JPS6139987A - Maintenance recording media - Google Patents

Abstract

PURPOSE:To shorten a maintenance time by installing a display label area identifying that it is a media for maintenance when access is executed, a directory area indicating a destructive write, a write and read test exclusive-use area and a write characteristic test area. CONSTITUTION:At an optical disk as a maintenance recording media, data can be written and read from a data processing device through a recording device and a destructive recording which cannot be re-written to the same position is executed. A spiral format transferred from an inner circumference track to an outer circumference track shown as an item No. 21 is obtained, and the item No. 21 is used as a system area. VOL LABEL is written in an item No. 22 and a disk for maintenance can be identified. In item No. 23 block length and used quantity are written. Used areas are written at a directory area for an item No. 24 and at a written test area shown in item Nos. 26 and 30. Item Nos. 25, 27, 29 and 31 are distributed from inner circumference to outer circumference at a read test area and data which can measure write-in characteristics are written. For this reason, an efficient test can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a maintenance recording medium, and particularly to a maintenance recording medium that allows maintenance and adjustment of an optical disk to be performed in a short time.

[Background of the invention]

In an optical disk device that uses an additional recording format in which information is sequentially written onto the disk, rewriting information that has already been written on the disk is destructive, so Information is erased and lost. For this reason, there are various problems when testing the write and read characteristics using maintenance media.

Conventional BDP (Ers, atronic Dat
2. Description of the Related Art In magnetic disk devices and the like that constitute a processing system, maintenance media for recording devices are used for replaceable disk devices. In order to set the alignment of the magnetic head on this maintenance medium, a special pattern is written on the disk surface, and the magnetic head is aligned using an oscilloscope.

Furthermore, when testing the write and read characteristics, since magnetic disks are rewritable, the write and read characteristics can be freely tested if the disk is a work disk.

Next, for fixed disk drives, head alignment etc. are determined at the manufacturing stage, so there is no need for maintenance media for alignment settings, and when testing write/read characteristics, the user A special CE rack (maintenance truck) is installed outside the area of use to test the read/write characteristics. In this case as well, since rewriting is possible, the area can be used freely.

On the other hand, in the case of an optical disk device with an additional recording format, it is possible to test the writing characteristics by avoiding the location of the data that has been written and writing again, but it is possible to test the writing characteristics by avoiding the location of the data that has already been written. This means that optical discs with huge storage capacities require extremely long periods of time.
It does not meet the requirement for short-term maintenance at all.

In addition, when performing maintenance, it is often necessary to test the device in which an abnormal situation has occurred, but in the case of a recording device that uses an additional recording method, abnormal data is written in an abnormal state, so maintenance Even if a medium is used, it is thought that the condition will become so abnormal that it cannot be used again. For this reason, test items for write characteristics are limited as much as possible to prevent abnormal situations such as runaway during writing. ! After that, it is necessary to test as much as possible using a read test. Furthermore, when testing read characteristics, it is necessary to create a data pattern that is close to the limit so that characteristics with insufficient margin can also be captured. Furthermore, in the case of a disk device, there is a large difference in writing density between the inner and outer circumferences of the disk disk, so it is also necessary to be able to determine which culm the margin is. However, in the past, even if requests were made for inline maintenance, maintenance using test programs using data processing equipment, or maintenance that did not affect the operating system, etc., it was not possible to efficiently and accurately respond to such requests. We have not proposed any maintenance media that can be tested.

[Purpose of the invention]

In order to satisfy such requirements, the object of the present invention is to provide a maintenance recording medium for an additional recording type recording device that can quickly search for a writing test area, accurately perform a writing/reading test, and shorten maintenance time. It is about providing.

[Summary of the invention]

In order to achieve the above object, the maintenance recording medium of the present invention is a maintenance recording medium of a destructive recording type in which data is written/read from a data processing device via a recording device and cannot be rewritten in the same location. A display label area that identifies the medium as a maintenance medium when accessed from the operating system, a directory area that displays the location of the area where destructive writing has been performed, and write tests and read tests distributed at multiple locations It is characterized by having a dedicated area for ``, and an area for write characteristic functions and margin testing.

[Practical side of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a configuration diagram of an information processing system to which the present invention is applied.

In FIG. 2, 1 is a central data processing unit, 2 is an input/output control device, 3 is an optical disk drive device, and 3 is an optical disk automatic loading mechanism. Various devices are connected to these main systems for maintenance purposes. That is,
Connected to the central data processing unit are a service processor having a maintenance function for the entire system, and a disk device 7 that stores online maintenance programs and error editing programs. Test programs can be run from the disk device etc. 7 that stores these programs while user tasks are being executed, if necessary, and the logging data is sent to the error editing program of the disk device etc. 7. Edited into various statistical data by
Prepared to ensure that maintenance work is carried out smoothly. Note that as the disk device etc. 7, a magnetic disk device, a magnetic tape device, etc. are used.

Next, a maintenance operation device 8 and a remote maintenance adapter 9 are connected to the human output control device 2 . In the human output control device 2, an offline test program is stored in a built-in flexible disk or the like, and offline maintenance is performed on the system below the control device 2 in a four-cal mode as necessary. The maintenance operation device 8 is a device dedicated to maintenance that operates the offline test program in the input/output control device 2 or performs simple operations. Further, the remote maintenance adapter 9 is connected to the CPU10 of another system through a line, and can perform quick diagnosis.

Next, the optical disk drive [! Off-line device maintenance equipment W, 11 is connected to 3, which performs off-line diagnosis of the system below the optical disc drive it3, that is, the drive unit 3 and the automatic disc loading mechanism 4.

Also, a CE disk (maintenance disk) 5 of the present invention is built in next to the automatic optical disk loading machine.
By formatting the E disk as shown in FIG. 1, new maintenance functions can be provided. Note that the other disks are user disks 12. The automatic optical disk loading mechanism completely automates the storing and ejecting of optical disk disks, and as an example, a case is shown in which a CE disk 6 according to the present invention is included in the user disk 12. However, the CE disk δ may be stored anywhere without being limited thereto.

The area where the operating system first accesses and reads the file is the VOL label section, but in the maintenance medium of the present invention, (1) the VOL label section indicates that it is a maintenance medium, and the area is not used by the user. To allow an operating system to continue executing other tasks without performing unnecessary services by declaring that the available area has already been completely used. Conversely, when performing maintenance, you can have the operating system confirm that the medium is for maintenance, and then run a test program or inline program to prevent the 21 program file from being accidentally deleted. Care is taken not to permanently destroy the

Next, in the maintenance medium of the present invention, (I) a specific track has a directory section, and when the write area is subdivided and all the areas have been written, the corresponding directory area (sector) is You can also write already written signals.

As with the recording media of conventional disk devices, if writing operations necessary for maintenance are performed without writing area management, writing area management will no longer be possible because optical disks cannot be rewritten. In the present invention, since the above-mentioned directory area is provided, management becomes possible. In other words, in the track-sector method, which divides the track into sectors and uses these sectors as the smallest unit for reading and writing, by managing the writing area, the time required to search for an unwritten area that can be tested is reduced to several tenths.
The IK can be reduced by several hundred minutes, and maintenance time can be significantly reduced. Furthermore, there is no risk of rewriting into an area that has already been written.

Next, in the maintenance medium of the present invention, (b) dedicated areas are provided at several locations on the disk from the inner circumference to the outer circumference for the read-only area, and from the inner circumference (high recording density) to the outer circumference ( 0
Note that it is also possible to write the worst pattern in terms of recording characteristics in advance and use it for reading test. Furthermore, if information is recorded in the read-only area in a direction that causes track deviation, and it is possible to check whether or not it is possible to read out to an acceptable value even in this case, a margin test can also be performed. Furthermore, by arranging read-only areas at several locations, it is possible to perform mechanical tests such as casing vibration due to theta operation.

FIG. 1 shows a maintenance recording medium (CB) showing an embodiment of the present invention.
Figure 3 is an explanatory diagram of the data track format of Figure 1.

As shown in FIG. 3 (1), in the case of an optical disc, there is an O track on the inner periphery and a 41299) rack on the outer periphery. and has a spiral track format,
It has a storage capacity of several gigabytes.

Logical track number 0 of item number 21 is used as a system area. Also, the logical track number l of item number 22 is V
This is the area where OL LABEL is written, and as shown in Figure 3(b), CEW is written on the surface so that the volume identifier can distinguish between the front and back of the optical disc.
RKA" and "CEWRKB" are written on the back side. This allows maintenance disks to be clearly distinguished from user disks. Logical track number 2 in item number 23 is the HDR (header) area. As shown in Figure 3 (63), the block length and extent (usage amount) are written after the identifier.The extent indicates the size of the data written on the disk. It is displayed that all user open areas have been used up.Therefore, even if there is an access from the operating system, the user program determines that the area cannot be used.

However, the test blog and inline program recognize this display and determine that it is a maintenance disk, so this disk can be used for testing. Next, logical track numbers 3 to 4 in item number 24 are directory areas, and it is also possible to write which track areas are used in the write test area shown in item number 26 and item number 30. .

In the case of the track-sector method, since the write/read unit is the sector unit, the minimum unit of the directory is also the sector unit, and the minimum unit of the write test is divided into 200 tracks each, for a total of 75 cases. In this case, there are two write test areas (G) and C), but in order to test the variation in characteristics on the inner and outer circumferences, the same data is written in the write test areas (1) and (1).
Writing to a is also considered. Therefore, the directory is managed by one pair of areas (1) (1) in one sector. In other words, as shown in FIG. 3(,), when tracks 214 are written from rack 15 in the write test area, and tracks 26489 are written from rack 26290 in the write test area 1, 13 tracks in the directory are written. FF data is written in sector 0 of the area, and that area is written to indicate that it has become used. Therefore, when testing, first refer to the directory, and if there is a sector in which no FF has been written, seek to the write test area corresponding to it, and read it sequentially from the low address track. It is possible to easily detect a write test area that has not been written and perform a write test.

Next, item numbers 25.27 and 29.31 are read test areas (1), (2), (3), and (4), which are distributed from the inner circumference to the outer circumference of the optical disc. As mentioned above, this arrangement is made taking into account various conditions that affect the margin, such as the difference in writing density between the inner and outer peripheries, the runout of the disk, and so on. Also, before using the CE disk for maintenance, the worst
Data that can measure margins, such as patterns and track deviation data, are written. Furthermore, the read test area ω~ (because lead is dispersed, various seek operations are possible, and mechanical resonance characteristics can be measured, etc.).

FIG. 4 is a maintenance test flowchart according to the present invention.

First, load the CE disk 6 into the optical disk drive 3 (Step ■), run the online test program or offline test program, check for errors (Step ■0), and perform error analysis. (Step ■), and after pointing out the defective part, carry out repair work (Step ■). In order to check whether the repair has been completed completely, run the test program again (step ■) and confirm that no errors are detected (step 0). If there are no errors, complete the maintenance (step ■).

FIG. 6 is a common sequence flowchart for conducting an online test.

First, the online
The test program reads >vot LhBgL already written in logical track number 22, and CEW
Check whether RKA "1" or "CEWRKB" is written, and check whether it is a user disk or not, and whether C
Check the front and back sides of the E-disk (step ■).

Next, the HDR (header) area of logical track number 23 is read, and it is checked whether there is an area open to the general public on the disk.

This is an additional check to protect the user disk from data destruction due to read/seek/write tests, and it is displayed that there is no user free area on the CB disk (step 0).

Next, the directory area with logical track number 24 is read out, and it is checked which track in the write test area shown in FIG. 3 can be used for the write test (step 2). After that, we test whether the normal commands, diagnostic commands, and system functions are normal 7, and then check whether the optical disk drive and automatic loading mechanism are operating normally and the system with various margins. (Step ■). Finally, write F to the sector of the directory that corresponds to the area written by this test.
, F, and register it as used (this may be done before the writing test) (step ■).

FIG. 5 is a maintenance test procedure (in the case of an online test) using the CB disk according to the present invention.

Start up the operating system (O8) and run the online maintenance programs running under it (
Step ■■). After checking whether the disk loaded in the optical disk drive device 3 is a CE disk, it is tested whether the control device 2 is functioning normally using normal commands, diagnostic commands, etc. Step 0■).

After confirming that these are normal, a combination of normal commands, diagnostic commands, and CE disks is used to check whether the devices connected to optical disk drive 3 and below (including the automatic disk loading mechanism) are functioning normally. Test by (step ■).

FIG. 7 is a flowchart of a read test according to the present invention.

A reading test is performed prior to the write test and seek test. First, the head is positioned in read test area #&(4) on the outer periphery of the disk (step ■). Various patterns have already been written on the disk in order to measure various margins in this area. In steps ■ to ■, check whether reading is possible with a normal PIT (hole drilled on the optical disk with a laser, etc.), whether reading is possible with the worst-performed PIT arrangement, and the hole diameter. This test tests whether reading is possible by changing the shape of the PIT in various ways, such as shape, depth, etc., and whether reading is possible by shifting the PIT position in the circumferential direction.

At that time, in order to measure the margin of information, a margin check can be performed by varying the signal acquisition pulse width, making it possible to perform a more effective test.

Next, the depth of the group, which is the track guide groove created during the manufacturing of the disc, is changed to determine whether or not regular track following is possible.

Perform the test (step ■). Next, measure the off-track margin when the PIT position is shifted in the radial direction from the normal track position (Step ■)
. Since the test of the kneading readout test area (4) has been completed, the head is next positioned in the readout test area 0 (step 2). In this way, by sequentially moving the test operation from the outer circumference to the inner circumference of the CE disk, the influence of the radial position of the disk can be investigated, and parts with no margin can be identified. . In step 0, the read data is analyzed, and in step [phase], faults are pointed out.

FIG. 8 is an operation 70-chart of a seek test according to the present invention.

In order to separate the functional units of the device under test, increase pointing accuracy, and prevent damage to the disk, it is desirable to perform the seek test after the read test and before the write test.

First, position the head outside the read test area,
A continuous following test at a fixed track position is performed to check whether the head following servo is functioning normally (step ■■). Next, seek/test F is performed for each %l track (step ■). An effective method is to provide an appropriate delay during this time and test under the condition where the track 7 ower is at its worst.

Next, a continuous repeated seek test F between certain tractors is performed (step ①). At this time, the minimum theta (continuous theta between one track) test tests whether the servo characteristics of Miku 4 seek operate with a margin,
Next, we conducted a seek test in an operating mode in which the seek speed reaches its maximum and then immediately decelerates to a certain tractor position.This test takes into consideration the characteristics of various servo mechanisms.・You can perform the mode. Next, the seek track width is gradually increased to test whether there is any abnormality in the upper servo system and mechanical resonance characteristics (step 0).

Knead and test the test area (4), then position the read test area (33k head (step ■). Here, perform the same test as before (step ■
). After performing the random seek test sequentially from the outer circumference to the inner circumference of the CE disk in this manner, a random seek test is carried out over the entire disk surface to test the overall seek operation (step @). In step @, error analysis and failure points are pointed out.

FIG. 9 is an operational flowchart F of a write test according to the present invention.

It is desirable to perform this test last to prevent damage to the disk. First, write test area■
Theta is written on the unwritten track, and the worst
Write the pattern and perform error checking (step ■■■). Next, the same pattern is written to the track in the write test area (1) corresponding to the track written in the write test area (1), and an error check is performed (step ■■). Next, after repeating the above steps by changing the laser power, the error is analyzed and the defect is pointed out (step ■■■).

If maintenance is performed using a CE disk having such a pattern, it is possible to quickly search for an area for a write test, and it is also possible to perform a write/read test with high accuracy.

You can also download the maintenance recording medium (
CE disk), and conversely, by checking that test programs and inline programs are maintenance recording media during maintenance, user files can be protected. Destruction, etc. of the equipment can be prevented.

By performing write/read tests more efficiently and accurately, the overall maintenance time can be reduced from several tenths to several hundredths of that of the conventional technology.

〔Effect of the invention〕

As explained above, according to the maintenance recording medium of the present invention,
By reading the directory section first, the area written by the additional recording type recording device can be determined, so the area to be tested for writing can be quickly searched, and multiple write test areas and read test areas can be set. This makes it possible to test efficiently and accurately, and to significantly reduce overall maintenance time.

[Brief explanation of drawings]

FIG. 1 is a diagram of a tochituta format of a maintenance recording medium showing an embodiment of the present invention, FIG. 2 is a configuration diagram of an information processing system to which the present invention is applied, and FIG. 3 is a data track format diagram of FIG. 1. 4 is a maintenance test macro '7υ-diagram according to the present invention, and FIG. 6 is a maintenance test flowchart using a CE disk according to the present invention.
Figure 6 shows the common sequence for conducting online tests.
FIG. 7 is a flowchart of a read test according to the present invention, FIG. 8 is an operational flowchart of a seek test according to the present invention, and FIG. 9 is an operational flowchart of a write test according to the present invention. 1: Central data processing unit, 2: Input/output control unit, 3 = Optical disk drive unit, 4: Automatic disk loading 4M structure, 5:
CB disk, 6: Service processor, 7: Program storage disk, 8: Maintenance operation device. Figure 1 (a) (b) Figure 2 Figure 3 (c) Figure 4 Figure 5 Figure 6 Figure 7 Figure 7 ■ Old

Claims (1)

[Claims] (1) When data is written to/read from a data processing device via a recording device and is accessed by the operating system on a maintenance recording medium that uses a destructive recording method that cannot be rewritten to the same location, the maintenance A display label area that identifies the medium, a directory area that displays the location of the area where destructive writing has been performed,
A maintenance recording medium characterized by having dedicated areas for write tests and read tests distributed at multiple locations, and areas for write characteristic functions and margin tests.