Recording medium and method of write protection

 

The invention relates to recording and playback of digital data on an optical disc. Its use allows to obtain a technical result in the form of protection from unwanted records stored in the body. Recordable and/or rewritable recording medium for recording data includes the initial area, the destination area and the data area of the user. The technical result is achieved due to the fact that the recording medium stores information of write protection, able to protect the data recorded on the recording medium from unwanted blending recording or Erasure and write protection is kept in reserve in multiple locations starting area. In another embodiment, the initial region additionally has an ID of the disk. In yet another embodiment, the technical result is achieved due to the fact that the security information from the records kept in reserve in multiple locations starting area, and a recording medium is recordable/reproducible recording media that meets the specifications multipurpose digital disk (WDC). 3 C. and 10 C. p. F.-ly, 2 tab., 19 Il.

The present image is svedeniya data from it and more specifically the way the write-protect to protect the recorded user data on the media, write-once or rewrite from unwanted blending recording or erasing and recording media for storing information from the write-protection.

The prior art Standard SMZD (recordable multi-purpose digital drives) and standard SMS (write once, read once, read many) are standards for disk write-once, and standard MCPD (multipurpose digital disk memory, random access) and standard PMCD (rewritable multi-purpose digital disk) are standards for rewritable disc.

In accordance with the standard MCPD, published in July 1997, entitled "Specifications WDC for rewritable disc, part 1: Physical specifications version 1.0", MCPD contains a cartridge containing a disk, and the disks from the cassette type 2 and type 3 can be used after removal of the cassette in the form of a planar disk.

For disk MCPD identified the following three types of cassettes. In the cartridge 1 is installed one-way drive or double-sided disk, and installed the disk can not be removed from the chassis. In the cassette type 2 establish a one-way drive, and installed the disk can be removed from the chassis. However, when the disk is removed from the body once the hole sensing element capable of sensing the removal of the disk is constantly changing in an open state so that the hole coustical the corps or not. In the cassette type 3 hole sensor is also able to determine out whether the drive from the chassis or not, opens early, so the disk can be removed from the enclosure and install it without restriction.

In addition, the cartridge has a hole barring entry (alternatively called "recognition switch for write protection") and in accordance with the standard on page RN-69 record on page possible, when opening a ban of the account is closed, and it is impossible, when the aperture is ban the account open. That is, when the user intends to protect recorded data from unwanted blending write or erase, the corresponding hole of the ban accounts that are in the closed state, it changes to an open state, so that the recording device cannot record on the disc corresponding cassettes.

However, in the case using a cassette type 2 or type 3 open-frame drive can be used without a housing, as described above. This is because the disk can be used in thin-recorder-playback, for example in a compact portable computer, in which you cannot install the cartridge. However vicepresidencia to the housing of the cassette.

For example, when the user after removing disk that is installed in the housing, which protects write-sets in a thin disk recorder-playing, in which you cannot install the cartridge write protection through the holes of the write protection is no longer in effect.

In addition, there are many specifications associated with WDC, such as specification MCDPS (specification WDC for permanent storage device), specification SMZD (specification WDC for recordable disc). In addition, you can consider many specifications for rewritable WDC, which is not yet determined, for example specification WDC for recordable and readable disc, which is very similar specs SMCD and specifications for WDC ROM with increased density. This series of specifications with the prefix WDC called "family WDC".

Working from the computer system also includes various attributes, such as write protection and read-only, which is able to prevent arbitrary changes recorded data using the file attributes on which the recorded data. However, when the drive control is carried out on a lower level than the file system for elastic, when you initialize the disk where there is no link to the entire file system, or when the attributes of each file can not be taken into account, this method is not a reliable method of protection. Therefore, the data protection method without MCPD from unwanted blending write or erase is not yet widely spread.

If NCDPD, the disk can be used in open condition, as well as in the housing. However, in the case SMCD or PMCD you cannot use the drive in the enclosure, so that the need to protect open-frame drive from unwanted blending recording or erasing is increased. However, when using removed from the housing without the disc you can't use the hole prohibition write, so write protection must be provided at the disk.

In the specification SMCD, specifications, 3.95 GB (Version 1.0) specifications 4.7 GB (final plan, version 1.9) does not mention the method of write protection for open-frame drive. Meanwhile, specifications PMCD prepared on the basis of specifications SMCD, in particular. Version 1.9 defines the use of open-frame drive without the enclosure. However, if additional specification defines the use of a disk is the first disk, because this is a normal way of write protection, which applies to MCPD, using the hole that write access is denied.

If the specification PMCD allows you to use the case, then the recording can be prevented by using a hole that write access is denied, as in MDPD. However, if the user forgot to translate the opening status of the prohibition of recording the position of the prohibition of entry, it can happen unexpected Erasure or overlay data records.

Summary of the INVENTION the present invention is to provide a recording medium on which is stored information of write protection on the disk contained in the body.

Another objective of the present invention is to provide a recording medium on which information of write protection, able to protect planar disk from unwanted blending write or erase stored on disk when the planar disk is removed from the case.

Another objective of the present invention is to provide a method of write protection device for recording and / or playback, able to protect the information recorded on the recordable and (or) rewritable media, spam overlay recording or erasing.

To achieve the first and the WTO, is teradise in the case of tapes or die state in which the recording medium stores information of write protection, able to protect the data recorded on the recording medium from unwanted blending write or erase.

To achieve the third objective of the present invention, is provided a method of write protection for the optical recording and / or reproduction on the disk, on which data is recorded on a recordable or reproducible recording medium, which includes the initial area, the destination area and the data area of the user are protected from unwanted blending recording or erasing, the method comprises the steps of (a) verify the information write-protect stored on the recording medium, and (C) the prohibition of recording data on the recording medium in accordance with the information of write protection.

A BRIEF description of the DRAWINGS the Above objectives and advantages of the present invention will become more clear from the detailed description of a preferred its embodiments with reference to the accompanying drawings, in which: Fig. 1 is a depiction in perspective of the cartridge for MCPD (multipurpose digital disk memory, random access), having a hole ziprealty defects (OAD) normal MCPD; Fig. 4A and 4B illustrate examples of data structures OAD drive MDPD to memorize information write protection in accordance with the present invention; Fig.5A and 5B illustrate additional examples of data structures OAD drive MDPD to memorize information write protection in accordance with the present invention; Fig. 6 is a graphical chart of the program, illustrating the corresponding preferred variant implementation of the present invention a method of write protection;
Fig. 7 is a graphical chart of the program, illustrating the corresponding present invention a method of correcting information of write protection;
Fig. 8 illustrates the structure of the ID disc for storing information of write protection in accordance with the present invention;
Fig. 9 illustrates the data structure of the information write-protect the memory shown in Fig.8 zone identification disk;
Fig.10 illustrates a structure of a drive that meets the General specifications SMCD and PSMD;
Fig.11 illustrates the structure shown in Fig.10 initial region;
Fig. 12 illustrates the structure shown in Fig.11 zone control data;
Fig. 13 illustrates Soderstrom and PSMD;
Fig. 14 illustrates the contents shown in Fig.13 normal 0 field DUZ;
Fig.15 illustrates the contents of the 0 field DUZ to memorize information write protection in accordance with the present invention, and
Fig. 16 is a graphical diagram of a program illustrating corresponding to another variant implementation of the present invention a method of write protection.

DESCRIPTION of the PREFERRED embodiments of the INVENTION
In Fig. 1 shows the opening of the prohibition of tape corresponding specifications MCPD. Note that the reference position 1 shows the opening of the prohibition of entry, and the reference position 2 shows the hole sensing element used to determine out whether the drive from the case.

In Fig. 1 closed hole 1 prohibit entry indicates that the entry is allowed and the open hole 1 prohibit entry indicates that the entry is forbidden.

Thus, when you open the hole 1 of the prohibition of entry in the respective device record-playback MCPD, writing data to disk is prohibited, even if the outer side, you enter the write command, so that the information recorded on the disk can be protected from unwanted imposing record.

the initial region, the user data area and the destination area in the aspect of function. In addition, the disk can be divided into a rewritable area and a write once area. In particular, the initial area contains the area to read-only in the innermost part, which represents the area of a write once relief data, containing indentations, and an area of a rewritable data zone after only reading, in which you can carry out and record and playback. Meanwhile, the destination area and the data area contains only an area of a rewritable data. Area to read-only initial field contains information about the physical characteristics of the disk. Area of a rewritable data start field and end field contains four management defects OD, OD, OD and OD, which contains the information about the defects of the disk, the test area of the disk for use by the manufacturer of the disk when checking the disc status, zone test drive for testing operations of the recording and reproduction device of the recording-playback, the protective zone of the track and the area identification disk.

In the version 1.0 specification MCPD purpose use the ID of the disk and the court), in particular, as described on page PH-155-PH-158 specifications MCPD, and especially they show the structure of the characteristic data certification data and sign the certification group, respectively, in the field of structure determination disc (SOD).

All four management defects OD, OD, OD and OD are in the initial region and the end region, in which OUT and OUT are in the initial region, and OD and OD are in the target area, and each area is stored the same information concerning defects of the disk and the disk is initialized. Record this identical information in different areas, i.e. in two areas OUT and OUT primary area and two areas OUT and OUT end region, carried out to prevent the problem of unavailability of data for use due to defects of the disk.

As shown in Fig.3A, in the 3rd byte position, that is, BPG structure definition disc (SOD), there is a sign certification of the disk, and sign the certification of the disk contains the information "in the process" that shows the status of the disk initialization, the sign "certification" user indicating whether the disk by the user, and sign the "certification of the manufacturer of the disk, showing whether sootnosyatsya about the whole disk.

In addition, in the byte positions 16-39, i.e. BP-BP, each byte has mark certification group, as shown in Fig.3B, in an identical configuration. Byte position BP-BP have information initialization approximately 24 recordable areas, which is a group defined in the Version 1.0 specification MCPD. That is, each sign of the group certification has information "in the process, showing the initialization status of the corresponding group, and sign the "certification" user indicating whether the user disk. Here the group indicates a special recordable area of the disk.

In Fig. 4A and 4B show examples of data structures characteristic of certification drive and sign the certification group area structure definition disc (SOD) management defects (OAD), in which the recorded information of write protection in accordance with the present invention. In the data structure shown in Fig. 4A sign certification of disk information "write-protect the disk stored in binary bits B4 and B3 of the reserve sign certification of disk "Backup", in contrast to the data structure shown in Fig.3A sign the certification of the disk, and is defined as follows:
Protect the t performed on the entire disk, except for the field testing of the drive and area OAD.

11V - Disk write-protected. - Will not be recorded on the entire disk. These binary bits will not be changed to other values.

Others Back.

In the same way shown in Fig.4B, the structure of the characteristic data certification group stores information "write protection group" in binary bits B4 and B3 of the reserve sign certification group "Backup" in contrast to the structure of the characteristic data certification group shown in Fig. 3B, and is defined as follows:
Write-protecting group
B4, B3=00 a.m. - Group is not write-protected.

10V - Group write-protected. This unit will not store user data.

Others Back.

In table. 1 shows the state of the binary bits B4 and B3 of the sign certification of the disk and the binary state of bits 4 and B3 sign the certification group.

In table. 1 flexible write protection means that the write protection can be released (unlocked), i.e. the state of write protection can be changed on a rewritable state by setting the appropriate bit B4 to "0". Hard write protection also means that sasalita to recover in a rewritable state.

When the hard write protection for the group doing the hard part is write-protected disk, does not provide benefits for the user in use, and not in the technical aspect, and in particular there is a problem processing in the corresponding group, when re-initiate the entire disk. Thus, adversely install the hard write protection for the group.

As shown in the data structure of Fig.4A and 4B, information write-protect the disk is recorded in the structure definition disc (SOD) management defects (OAD), and identical information "write protection" is recorded four times on the same disk, so the disk increases the reliability of the information of write protection.

When the planar disk is write-protected, insert for use in the housing, the opening of a ban record of which is in a rewritable state, or if the unpackaged drive is not write protected, is inserted into the housing hole of a ban record of which is in the state of write protection, stored on the disk information of the prohibition of entry may not match the state of the holes of the prohibition of recording the chassis.

In this case, if either the disk or case write-protected, before the of the motor is prefer to the content data, and in this case was tested without imposing record, and not to damage important data due to overlapping entries.

In Fig.5A and 5B presents additional examples of data structures characteristic of certification drive and sign the certification group, respectively, the field structure definition disc (SOD) management defects (OAD), which stores information of write protection in accordance with the present invention.

In the case when the information of write protection is shown in Fig.5A sign the certification drive, you can use only one binary bit B4, regardless, is whether the write protection for the hard write protection or for flexible write protection, which is defined as follows:
Write protected disk
B4=0V - Disk is not write protected.

1B - you Cannot write to the entire disk, except for the field testing of the drive and area OAD.

It is shown in Fig.5B is a sign of the test group can store the information of write protection, using only one binary bit B4, which is defined as follows:
Write-protecting group
B4=0V - Group is not write protected.

1B - Group C is but use binary bit B4 sign the certification of the disk and the binary bit B4 sign the certification group. However, instead of using the bit B4 of the sign certification drive or sign the certification of a group, you can use any "Backup" binary digit.

In addition, you can use binary bit B4 characteristic certification group, that is a sign of "write protect group". This effectively in the disk, in which only a specific group is not write protected, and in this case, the binary bit B4 sign the certification of the group is "Backup", as in the usual certifications.

The present invention can be applied to the body without holes ban the account, and information on the disc can effectively protect in this case, using saved on the disk write protection.

In Fig.6 presents a graphical diagram of a program illustrating a method of protection against the entry corresponding to the preferred variant implementation of the present invention. First check to see if the drive in the enclosure (step S101), and if the drive is installed in the housing, then check the status holes ban record of the case (step S102). That is, when the aperture of the ban is closed, this means that the cartridge is not write protected. When opening a ban of the account is open, it means that the cartridge protection S102 status holes ban account, check (step S103) sign write-protect the disk. That is, check the signs of write protection in the indication of the certification drive and sign the certification group.

At step S104 determines is consistent whether the write protection status holes prohibition of tape. That is, when the information of write protection recorded on the disc and the hole of the prohibition of recording the chassis is open, determine whether the sign of the write protection feature of the certification of the drive state to "write-protect" (step S105). Otherwise, the user is informed that the information write-protect the disk is not consistent with the state openings of the prohibition of recording the chassis (step S106).

If the characteristic of the write protection feature of the certification of the disk is set at step S105 in the state of write protection, or if either the drive or the enclosure indicates the status of the write protection, even if both conditions are sewn from the disc and case are not consistent at step S106, perform the inspection (step S107), set the drive state to "hard write protection". If the drive is set to "hard write protection" prohibit (step S108) recording data on the entire disk, including the initial area and the destination area, but no region Yes is blasti test drive and management defects (OAD).

If at step S105 determines that the sign of the write-protect indication certification no drive is set to "write protect", then check to see if the sign of the write protection characteristic the group certification status to "write-protect" (step S110). If the sign of the certification group is set to "write protect", then the write data in the corresponding group is prohibited (step S111). Otherwise, allow the entry of data in a rewritable area (step S112 ().

It is shown in Fig. 6 the way of the write-protect corresponds to the case of using sign the certification of the drive that contains the sign of the hard write protection, shown in Fig.4A, and sign the certification group shown in Fig.4B. When use is shown in Fig.5A is a sign certification of the disk shown in Fig.5B is a sign certification group shown in Fig.6 steps S107 and S108 are not doing. When at step S105 sign the certification of the disk is set to "write protect", the write data in the data area of the user at step S109 prohibit.

Fig. 7 is a graphical chart of the program, illustrating the method of installing a rewritable disc in the state of write protection, or state changes samity write with reference to the shown in Fig.7 is a graphical chart of the program.

As shown in Fig.7, when the disk or cassette in the recorder-playback, make check (step S201) information of write protection. Then determine (step S202), whether the user information of write protection, and after the introduction of user information write protection determined (step S203), whether the user had selected information for write protection. If the user information is information of write protection, then the corresponding characteristic of the write-protect a disk mounted on the status of the write protection (step S204).

If the information set by the user at step S203 is not the information of write protection, then determine (step S205), is the information set by the user, information release write protection. If the user information is information you release the write protection, then determine (step S206), is whether the current drive in the hard write protection. If the current drive is the hard write protection, then the user is informed (step S207) that the write protection cannot be released. If at step S206 determines that the disk is not in a state of rigid sisiter>

In addition, when the installation is complete write protection or release the write protection of the disc, i.e. at the completion of step S204, S207 or S208 and install the drive in the enclosure, is determined at the step S209, how does opening status of the prohibition of recording the chassis with the security information from records stored on disk. If the status holes ban account housing is not consistent with the condition of the disc, the user is informed about this difference (step S210) and then complete the procedure.

It is shown in Fig.7 the method of correcting information of write protection can be accomplished by the insertion of planar disc or a disc is inserted into the housing, and can be performed after the write-protect using the information of write protection, as described with reference to Fig.6.

In a preferred embodiment of the present invention the security information from the disc record management defects of the disk. However, instead of managing defects of a disk can be used is shown in Fig.2 zone identification disk. Area identify the drive there in the start field and end field like management defects of the disk. Thus, the record is identical to the information of two or more shall be reliability to the same extent, as in the management of defects of the disk.

Because the area identify the drive is not currently used for a particular purpose, advantage is that the area identify the drive does not contradict the information recorded in the management area, the defect of the disk. In particular, information information about defects applies only MCPD, so it is difficult to maintain compatibility between discs for optical record-playback. Meanwhile, since the area identify the drive is not limited to a special disk, an ID of the disk can be maintained consistent with another disk that meets the same specifications.

An example of storing information of write protection, using an ID of the disk, will be described with reference to Fig.8 and 9.

As shown in Fig. 8, in the structure of the ID of the disk that stores information of write protection for open-frame drive, in the area of identification of the disk simultaneously recorded four characteristic for write protection and read two or more normal characteristic of the four signs. If the content of the signs read consistent with each other, it is considered that the write-protected disk is installed.

Such is the drive 1 block size (equal to 1 byte), write down four times in four blocks from the beginning of the ID disc initial region, and all the first bytes of the identification information of the disk contain the characteristic of the write protection. Identification information of the disk 1, a block size, summarize, as shown in the table. 2.

Sign write protection (ZZ) information identifying the disk corresponds to the oldest binary digit (SDR) of the first byte, as shown in Fig. 9. When the characteristic value (indicated by "ZZ") is 1V (binary), this means that the entire area of the disk is write-protected, except for the ID of the disk and zone test drive. In addition, when the characteristic value is 0, this means that the entire area of the disc is rewritable. That is, the "ZZ" in Fig.9 is defined as follows:
ZZ= 1 in the Entire area of the disk is write-protected, with the exception of the test drive and the ID of the disk.

=0V Entire area of the disk is not forbidden to write.

The reason for reading only two of the normal characteristics of the four recorded signs of write protection is as follows. In that case, if recorded only one characteristic of the write-protect error can be created in the area in which is recorded the corresponding characteristic, so that the area cannot be used. Also, if Pets only the backgrounds constantly on the disk due to an erroneous reading of the respective characteristic.

Meanwhile, when recording information of write protection in a large number of locations, the problem is that it increases the time required to read the relevant information. That is, can increase the time required for a number of processes, ranging from the insertion of the disk, including the reading of a variety of information from the disk and recognition of information required to control the disk drive microprocessor.

However, if the correction information of write protection, it only executes the operation correction. That is, due to the fact that information is not read, the recording time in units of several hundred milliseconds can hardly be taken into account. Thus, the record in four places perform because of the reliability of the information, and take into account the possibility of correcting errors during reading. That is, unless you create two errors, or read usually adjusted signs, and two of them coincide with each other, the state is sewn from disc set without reading the other signs, thereby increasing the operation speed.

The above proposed method of write protection is not limited MCPD, and it can be applied to the disk, keyseater will be described.

In Fig.10 shows the structure of a disk corresponding to the common specifications drive SMCD and PMCD. Drive roughly divided into two parts in respect to functionality, including region 3 (recording) information and region information. Area 3-information is divided into the OKM (calibration power calibration power and znz (control record), showing General information concerning the account, i.e. information about the recording mode of the disc, recording status, management optimal power and area of the frame, and the information area is divided into the initial region of the write data, in which the user can write data, and the destination area, which is not yet defined in the specifications SMCD and PMCD.

As shown in Fig. 11, the initial area contains the starting area (content: 00h), for which a specific purpose is not defined, the zone reference code (binary channel code ST-6T-7T), used to control the correlator RF signal to drive the first and second buffer zones (content: 00h) and the area management data includes the contents shown in Fig.12.

In Fig.12 information about the physical format of the control data zone is and what ostoronne/bilateral), areal density and distribution of the data area, and information about the manufacturer of the disk is not associated with compatibility.

In Fig.13 shows the contents of the field DUZ (data management) record management record (OAS), the corresponding specifications SMCD and PMCD. Znz contains the initial area of the OAS, including system backup field (content: 00h) and the unique identification and field DUHS. As shown in Fig.13, one field SCHOOL consists of 16 sectors in which the first sector is assigned as the area of loss of communication, basic information disc is memorized in the 0 field STATION, information associated with a running optimum power (MSD), is stored in 1 box DOUZ, special user data (content: 00h) memorized in the 2 field STATION, and information about the zone border is memorized in the 3 field of DOUZ. In addition, in the case of disk SMCD corresponding to the specifications of version 1.9, whenever you record to 4-12 fields DUZ memorized information 3-zone (zone records), including the elements of the record, and 13-14 field DUZ reserved.

In the case of a rewritable or erasable disk PMCD, the specification of which is yet to be determined, information 3 zone. stored in 4 field STATION, and 5 field DOUZ and 12 field On the account used reliability, certification before using the drive and control defects. 13 field of DOUZ and 14 field DUZ also reserved.

In Fig.14 shows the content of the usual disk, stored in the 0 field DUZ Fig. 13. In Fig.14 byte position BPO and BP store information about the format of DOUZ (recorded only 0001h), byte position BP stores information about the status of the disk, and the byte position BPG reserved. Byte position BP-BP store information about the unique identifier of the disk, which stores the date and time of recording data in the form of the code ASCP (American standard code for information interchange). In the byte positions BP-BP copied information pre-grooves, and the remaining byte positions BP-BP reserved. Here on disk SMCD information about the state of the disk, stored in byte position BP, is defined as follows:
(BP) - State disk.

00am - Indicates that the drive is empty.

V - Indicates that the disk is in the mode of simultaneous recording.

V - Indicates that the disk is in incremental mode entry.

V - Indicates that the disk is completed, when using incremental entry.

Others Back.

In Fig.15 shows an example of a table that shows what and PSMD, relevant to the present invention, using basic information disc, stored in the 0 field DUZ Fig.13.

That is, by determining the subsequent use of the reserve byte position BPG 0 field DUZ on the drive can transmit information indicating that the current disk is write protected.

(BPG) is a Sign of protection from the recording disk.

00am - Indicates that the disk is not write-protected.

V - Indicates that the disc is protected (hard) from the recording.

V - Indicates that the disc is protected (flexible) from the record. The recording will not be performed on an entire disk, with the exception of the ACM, and so forth.

In the corresponding present invention information write protection 00am indicates that the disk is not write-protected, V shows that the entire disk is write-protected (the hard write protection), and V shows that the entire disk, with the exception of part of the disk (e.g., ACM), write-protected (flexible write protection). In the present embodiment, the security information from the record indicates that the entire disk is write protected or not write-protected. However, in the field of DOUZ Fig.13 provides information associated with the previous data whenever new data is written, so that the write protection can be set only stock position BPG 0 field DUZ, in addition to the region of DOUZ, you can record information of write protection on the planar disk, using the initial area and the target area shown in Fig.10. In addition, the byte position BP ON field DUZ stores information about the status of the disk, so that the security information from the record can be stored in a byte position BP DUHS.

Because information write protection cannot be correct in SMCD after recording, given the consistency with the family drives WDC, information write protection can be shown by the finalizer, which means an entry for a particular initial region and the destination region. That is, that the finalization is completed, shows that SMCD write-protected. Otherwise, it means that the write protection is missing.

Furthermore, since the management of defects OD, OJ and OD disk MCPD is written to one and the same content many times to correct errors, it guaranteed reliability. In SMCD and PSMD this reliability is guaranteed by grouping data DOUZ region OAS and ensure data DUZ belonging to the same group with the same content.

The disk must include information about the format whenever current is shown in Fig.15, format DUZ can be defined using the byte position of RPU and BP field DUZ as follows:
(Bio, 1) - Format DUZ
0001h - write
0002h To overwrite
0003h - mode, compatible with recording and overwrite
Fig. 16 is a graphical diagram of a program illustrating a method of protection against the entry corresponding to another variant implementation of the present invention, given the proliferation of applications on PSMD contained in the body.

First, determine (phase spider S301 demonstration), installed the drive in the enclosure. If the drive is installed in the housing, the check (step W302) opening status of the prohibition of recording the chassis. That is, if the hole of the prohibition of recording the chassis is closed, it means that the cartridge is not write protected, and if the hole is ban the account is open, it means that the cartridge is write-protected.

If the drive phase spider S301 demonstration is not installed in the case, or when checking on the stage W302 status holes ban records check (step S303), the sign of a write-protect the disk. That is, check the sign of the write-protect 0 field DUHS.

Then determine whether the information corresponds to the write protection state of the holes of the prohibition of recording the chassis (step S304). That is, when the security information from tapecity write-able "write protection". Otherwise, the user is informed about what information to write-protect the disk does not match the condition, the holes write protection corps (step S306).

If at step S305 or after step S306 sign write-protect the disk is set to "write protect", i.e., if either the drive or the enclosure is in the "write protection", even if the write-protect a disk is not consistent with the state openings of the prohibition of recording the chassis, determine (step S307), set the drive state to "hard write protection". If the drive is hard to write-protect the entire disk, including in the area of user data, protect it from the record (step S308). Otherwise protects write-only data area of the user (step S309). In addition, if at the step S305, the sign of write protection is not able to "write protect", the disk is not write-protect (step S310).

At the appropriate present invention recordable and (or) re-writable media, such as on a disk that meets the specifications of the IDC, for example, MCPD, SMCD and PSMD, open-frame data disk, which is not the case, can be effectively protected. In addition, when either the housing or diet state disk or cassette. The result is that data recorded to the disc can be effectively protected from unwanted blending recording or erasing.


Claims

1. Recordable and/or rewritable recording medium for recording data, comprising the initial region, the end region and a user data area, wherein the recording medium stores information of write protection, able to protect the data recorded on the recording medium from unwanted blending recording or Erasure and write protection is kept in reserve in multiple locations starting area.

2. Recordable and/or rewritable recording medium under item 1, characterized in that the recording medium is a planar disk that is not contained in the housing of the cassette.

3. The recording medium under item 1, wherein the security information from the records kept in reserve for four times.

4. The recording medium on p. 3, characterized in that the four stored in the provision information protection records are stored in four separate blocks.

5. The recording medium under item 1, characterized in that the length information of write protection equal to at least one byte.

6. Recordable and/or the user data area, wherein the recording medium stores information of write protection, able to protect the data recorded on the recording medium from unwanted blending recording or erasing, and the initial region has an area identification disk, and the information of write protection is kept in reserve in multiple locations starting area.

7. The recording medium on p. 6, characterized in that the information of write protection is stored in four locations the ID of the disk.

8. The recording medium under item 7, characterized in that, when information of write protection, read from one of the four locations, the ID of the disk is write protect, read from another of the four locations in the same zone identification disk, the disk is set in the status of the write protection.

9. The recording medium on p. 6, characterized in that the recording medium is a planar disk that is not contained in the housing of the cassette.

10. The recording medium on p. 6, characterized in that the length information of write protection equal to at least one byte.

11. The recording medium under item 7, characterized in that each of the four locations is a separate block.

and the user data area, wherein the recording medium stores information of write protection, able to protect the data recorded on the recording medium from unwanted blending recording or erasing, and security information from records kept in reserve in multiple locations starting area, and a recording medium is recordable/reproducible recording media that meets the specifications multipurpose digital disk (WDC).

13. The recording media according to p. 12, characterized in that the recording medium is a planar disk that is not contained in the housing of the cassette.

Priorities for items:
15.06.1998 on PP. 1-3, 5-7, 9-10, and 12-13;
24.06.1998 on PP. 4, 8 and 11.

 

Same patents:
The invention relates to devices used in electronic devices as storage devices

The invention relates to optical instruments, namely, devices for automatic focus when printing, photolithography and fabrication of photomasks by scanning laser writing

The invention relates to optical systems and, in particular, to search using the optical head in the optical system

The invention relates to optical systems and, in particular, to search using the optical head in the optical system

The invention relates to the field of optical information recording

The invention relates to apparatus and method of playing an optical disc

FIELD: optical discs.

SUBSTANCE: sector header on optical disc has first and second headers, recorded in a way to deflect from track middle in opposite directions, and have address areas, wherein address signals are recorded and synchronous signals areas for detecting address signals. Playback signal generator includes photo-detector, having radial couples of detecting elements. Playback signal includes total signals V1 or V2 of radial couples of detecting elements, total signal RF_sum of detecting elements, counter-phase signal RF_pp of detecting elements, from optical signal reflected from disc. Header area detector generates header area signal, containing header area from playback signal received from playback signal generator. Level detectors for first and second synchronous signals receive playback signal from playback signal generator and perform detection of value of first synchronous signal in first header and value of second synchronous signal in second header. Balance calculator calculates balance value of first and second synchronous signals. Determining of error of slant is performed in accordance to balance value.

EFFECT: higher efficiency.

2 cl, 15 dwg

FIELD: optical record/play devices.

SUBSTANCE: data area on disc is divided into sectors. Each sector header has first header and second header, recorded in a way to deflect from track middle in opposite directions. Said first and second headers have address areas, wherein sectors address signals and synchronous signals areas are recorded, wherein synchronous signals for detecting address signals are recorded. First value of synchronous clock signal is detected from first header and is a Lvfo1. second value of synchronous clock signal is detected from second header and is a Lvfo3. relation of first value Lvfo1 to second value Lvfo3 is a previously set limited value.

EFFECT: higher precision of error detection.

7 cl, 15 dwg

FIELD: optical data carriers.

SUBSTANCE: optical data carrier has at least two layers, each of which is a substrate with recording film, on which optically discernible code relief is formed with information elements readable via laser radiation, which contain elements with optical limiting property. Method for manufacture of optical multilayer data carrier includes manufacture of at least two layers, each of which has optically discernible code relief with laser radiation readable information elements, which are formed of substance, having property of optical limiting. Method for multilayer optical recording of data, in which information is recorded by forming and moving pulses of laser radiation flow along surface of recording film in formed tracks, filled with substance, having optical limiting property, or components for synthesis of substance, having property of optical limiting. Method for reading from optical multilayer data carrier, including forming of laser radiation flow, its focusing at read layer with optically discernible code relief with information elements, containing substance, having property of optical limiting, modulation of light signal reflected from code relief by frequency and amplitude.

EFFECT: higher efficiency.

4 cl, 3 dwg

FIELD: optical data carriers.

SUBSTANCE: optical data carrier has at least two layers, each of which is a substrate with recording film, on which optically discernible code relief is formed with information elements readable via laser radiation, which contain elements with optical limiting property. Method for manufacture of optical multilayer data carrier includes manufacture of at least two layers, each of which has optically discernible code relief with laser radiation readable information elements, which are formed of substance, having property of optical limiting. Method for multilayer optical recording of data, in which information is recorded by forming and moving pulses of laser radiation flow along surface of recording film in formed tracks, filled with substance, having optical limiting property, or components for synthesis of substance, having property of optical limiting. Method for reading from optical multilayer data carrier, including forming of laser radiation flow, its focusing at read layer with optically discernible code relief with information elements, containing substance, having property of optical limiting, modulation of light signal reflected from code relief by frequency and amplitude.

EFFECT: higher efficiency.

4 cl, 3 dwg

FIELD: optical data carriers.

SUBSTANCE: optical data carrier has at least two layers, each of which is a substrate with recording film, on which optically discernible code relief is formed with information elements readable via laser radiation, which contain elements with optical limiting property. Method for manufacture of optical multilayer data carrier includes manufacture of at least two layers, each of which has optically discernible code relief with laser radiation readable information elements, which are formed of substance, having property of optical limiting. Method for multilayer optical recording of data, in which information is recorded by forming and moving pulses of laser radiation flow along surface of recording film in formed tracks, filled with substance, having optical limiting property, or components for synthesis of substance, having property of optical limiting. Method for reading from optical multilayer data carrier, including forming of laser radiation flow, its focusing at read layer with optically discernible code relief with information elements, containing substance, having property of optical limiting, modulation of light signal reflected from code relief by frequency and amplitude.

EFFECT: higher efficiency.

4 cl, 3 dwg

FIELD: data carriers.

SUBSTANCE: method includes forming a mark and space with use of signal, containing record template, erasing template, having multiple pulses, and cooling pulse, connecting templates of recording and erasing.

EFFECT: higher efficiency.

3 cl, 21 dwg

FIELD: data carriers.

SUBSTANCE: method includes forming a mark and space with use of signal, containing record template, erasing template, having multiple pulses, and cooling pulse, connecting templates of recording and erasing.

EFFECT: higher efficiency.

3 cl, 21 dwg

FIELD: data carriers.

SUBSTANCE: in optical data carrier, including track, including multiple recesses, formed on basis of first data being subject to recording, and platforms, formed between adjacent recesses, these recesses are recorded with deformation on basis of second data. First and second data are synthesized and played for realization of sound playback with broad frequency range. Also, first data are recorded with possible playback by means of common disc player. Playback of first data is controlled by second data for protection of recorded data.

EFFECT: higher efficiency.

6 cl, 44 dwg

FIELD: data carriers.

SUBSTANCE: in optical data carrier, including track, including multiple recesses, formed on basis of first data being subject to recording, and platforms, formed between adjacent recesses, these recesses are recorded with deformation on basis of second data. First and second data are synthesized and played for realization of sound playback with broad frequency range. Also, first data are recorded with possible playback by means of common disc player. Playback of first data is controlled by second data for protection of recorded data.

EFFECT: higher efficiency.

6 cl, 44 dwg

FIELD: data carriers.

SUBSTANCE: in optical data carrier, including track, including multiple recesses, formed on basis of first data being subject to recording, and platforms, formed between adjacent recesses, these recesses are recorded with deformation on basis of second data. First and second data are synthesized and played for realization of sound playback with broad frequency range. Also, first data are recorded with possible playback by means of common disc player. Playback of first data is controlled by second data for protection of recorded data.

EFFECT: higher efficiency.

6 cl, 44 dwg

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