JPH0150032B2 - - Google Patents

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 optical disk drives that use an additional recording format that writes information on the disk in sequence, rewriting information that has already been written on the disk is destructive writing, so the previously written information is lost. It will be erased. For this reason, there are various problems when testing the write and read characteristics using maintenance media.

In magnetic disk devices and the like that constitute conventional EDP (Electronic Data Processing) systems, maintenance media for recording devices are used for replaceable disk devices. This maintenance medium has a special pattern written on its disk surface to set the alignment of the magnetic head, and the magnetic head is aligned using an oscilloscope. Also, when testing write and read characteristics,
Since magnetic disks are rewritable, the write and read characteristics of work disks can be freely tested.

Second, for fixed disk drives, head alignment, etc. are determined at the manufacturing stage, so maintenance media for alignment settings are not required, and users can also test read/write characteristics. A special CE track (maintenance track) is set up outside the area of use to test 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 data that has been written and writing again, but it is not possible to test the writing characteristics by searching for an area where data has already been written. In the case of optical disks having a huge storage capacity, this takes an extremely long time and does not meet the demand for maintenance in a short period of time.

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, it is necessary to limit the test items for write characteristics as much as possible, and to perform a read test as much as possible after writing to prevent abnormal situations such as runaway during writing. 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 the extent of this margin. However, in the past, even if requests were made for inline maintenance, maintenance using test programs using data processing equipment, or maintenance that had no impact on the operating system, etc., it was not possible to perform efficient and accurate testing. No possible maintenance media has been proposed.

[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, and a directory area that displays the location of the area where destructive writing has been performed, are provided in multiple locations, It is characterized by having a write area in which no data is recorded in order to perform a write test, and a read area which is distributed in a plurality of locations and in which a test pattern is recorded in advance in order to perform a read test.

[Embodiments 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 a central data processing unit;
is an input/output control device, 3 is an optical disk drive device, and 4 is an input/output control device.
is an optical disk automatic loading mechanism. Various devices are connected to these main systems for maintenance purposes. That is, a service processor having a maintenance function for the entire system and a disk device 7 storing an online maintenance program and an error editing program are connected to the central data processing device. Test programs can be run from the disk device etc. 7 storing these programs while the user's business is being executed, if necessary, and the logging data is sent to the error editing program of the disk device etc. 7. It is compiled into various statistical data and prepared to facilitate maintenance work. 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 input/output control device 2 . In the input/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 local 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. In addition, the remote maintenance adapter 9 is connected to the CPU of another system.
10 via a line, allowing remote diagnosis.

Next, an offline device maintenance device 11 is connected to the optical disk drive device 3, and this performs offline diagnosis of the system below the optical disk drive device 3, that is, the drive device 3 and the automatic disk loading mechanism 4.

Further, the optical disk automatic loading mechanism 4 has a built-in CE disk (maintenance disk) 5 of the present invention, and the format of this CE disk is
By forming it as shown in the figure, a new maintenance function can be provided. Note that the other disks are user disks 12. The optical disk automatic loading mechanism 4 automates the storage and ejection of optical disk disks, and for example, the optical disk automatic loading mechanism 4 automates the storage and ejection of optical disk disks.
The case where CE disk 5 is included is shown, but
The CE disk 5 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 this invention (i) this VOL
By displaying the fact that it is a maintenance medium on the label and declaring that the user-usable area has already been completely used, other Keep business running. Conversely, when performing maintenance, it is possible to accidentally permanently destroy user files by having the operating system confirm that the medium is for maintenance and then running a test program or inline program. We take care not to do so.

Next, in the maintenance medium of the present invention, (ii) a specific track has a directory section, and when the write area is subdivided and all the area has been written, the corresponding directory area (sector) is Write the written signal.

Just like the recording media of conventional disk devices,
If a write operation necessary for maintenance is performed without performing write area management, writing area management will no longer be possible since optical disks cannot be rewritten. However, in the present invention, the above directory
By setting up an area, management became possible. In other words, in the track/sector method, which divides the track into sectors and uses these as the minimum unit for reading and writing, by managing the write area,
The time required to search for an unwritten area where a write test can be performed can be reduced from one-tenth to one-hundredth, 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, for (iii) the read-only area, dedicated areas are provided at several locations on the disk from the inner circumference to the outer circumference, and from the inner circumference (high recording density) to the outer circumference (recording The readout characteristics of each part up to (low density) will be used in stages to test the readout characteristics of VFOs, etc. Note that it is also possible to write the worst pattern in terms of recording characteristics in advance and use it for testing the reading system. Furthermore, if information is recorded in the read-only area in the direction that causes track deviation, and it is possible to check whether it is possible to read out to an acceptable value even in this case, a margin test can also be performed.
Additionally, by arranging read-only areas at several locations, it is possible to perform mechanical tests such as chassis vibration due to seek operations.

FIG. 1 is a track format diagram and explanatory diagram of a maintenance recording medium (CH disk) showing one embodiment of the present invention, and FIG. 3 is an explanatory diagram of the data track format of FIG. 1.

As shown in FIG. 3a, in the case of an optical disc, there is a 0 track on the inner circumference and a 41299 track on the outer circumference. It has a spiral track format and has a storage capacity of several gigabytes.

Logical track number 0 of item number 21 is used as a system area. In addition, logical track number 1 of item number 22 is an area in which a VOL LABEL is written, and as shown in Figure 3b, the volume identification name is written on the front side so that the front and back sides of the optical disk can be distinguished. “CEWKA” on the back, “CEWRKB” on the back
is written. This allows maintenance disks to be clearly distinguished from user disks. Logical track number 2 in item number 23 is
This is an HDR (header) area, and as shown in FIG. 3b, the block length and extent (usage amount) are written after the identification name. The extent indicates that the size of the data written on the disk has already used up all of the user open area. Therefore, even if the operating system accesses it, it is determined that the user program cannot use it. However, the test program 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 of item number 24
is the directory area, and which tracks are used in the write test area shown in No. 26 and No. 30.
It is designed to write whether the area is used or not. 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 (1) and (2), but in order to test the variation in characteristics on the inner and outer circumferences, the same data is written in test areas (1) and (2). ). Therefore, the directory is managed by a pair of areas (1) and (2) in one sector. In other words, as shown in Figure 3c, from 15 tracks to 214 tracks are written in the write test area (1).
Even tracks are written, and there is also a writing test area.
(2) When tracks 26290 to 26489 are written, they are written to sector 0 of directory 3 track.
FF data is written, indicating that the area has already been written and is no longer used. Therefore, when testing, first refer to the directory and if there is a sector where FF is not written,
By seeking to the corresponding write test area and sequentially reading from the lowest address track, it is possible to easily detect an unwritten write test area and perform a write test.

Next, item numbers 25, 27, 29, and 31 are read test areas (1), (2), (3), and (4), which are distributed from the inner circumference to the outer circumference of the optical disk. 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. Furthermore, before using the CE disk for maintenance, data that can be used to determine margins, such as worst pattern track deviation data, is written in advance. In addition, read test area (1)
Since ~(4) is distributed, various seek operations are possible, and mechanical resonance characteristics can be measured.

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

First, attach the CE disk 5 to the optical disk drive device 3.
Load the program (step), run the online test program or offline test program, check for errors (step), perform error analysis on the program as much as possible (step), point out the problem, and repair it. Perform the 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). If there are no errors, maintenance is completed (step).

FIG. 6 is a common sequence flowchart for conducting online tests.

First, check logical track number 22 using the online test program under the operating system.
Reads the VOL LABEL already written on the disk, checks whether "CEWRKA" or "CEWRKB" has been written, checks whether it is a user disk, and checks the front and back sides of the CE disk (step).

Next, the HDR (header) area of logical track number 23 is read out, and it is checked whether there is an area on the disk that is open to general users.
This is an additional check to protect the user disk from data destruction due to read/seek/write tests, and a message indicating that there is no user free area on the CE disk is displayed (step).

Next, the direct area of 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). Then the normal command,
Test whether the diagnostic commands and each system function are normal, and then mainly check whether the optical disk drive device and automatic loading mechanism are operating normally and have various margins. Test (step). Finally, write F, F in the sector of the directory that corresponds to the area written in by this test and register it as used (this may be done before the write test) (step) .

FIG. 5 is a maintenance test flowchart (for online testing) using the CE disk according to the present invention.

Launch the operating system (OS),
The online maintenance program that operates under this is run (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).
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 unit 3 and below (including the automatic disk loading mechanism) are functioning normally. Test (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 section is positioned in the read test area (4) on the outer periphery of the disk (step). In this area, various patterns have already been written on the disk in order to measure various margins. In step ~, check whether reading is possible with normal PIT (hole drilled on optical disk with laser etc.), whether reading is possible with worst pattern PIT arrangement, hole diameter, shape, depth, etc. This test tests whether reading is possible by changing the shape of the PIT in various ways, and by shifting the PIT position in the circumferential direction. At that time, in order to measure the information margin, a margin check can be performed by varying the signal acquisition pulse width, making it possible to perform a more effective test.

Next, a margin test is performed to determine whether regular track following is possible by varying the depth of the group of track guide grooves created during disk manufacturing (step). Next, the off-track margin is measured when the PIT position is shifted in the radial direction from the normal track position (step). Now that the test of the read test area (4) has been completed, the head is next positioned in the read test area (3) (step). In this way, by sequentially moving the test operation from the outer circumference to the inner circumference of the CE disk, it is possible to investigate the influence of the radial position of the disk, and it is possible to identify parts where there is no margin. In the step, the read data is analyzed, and the problem points are pointed out in the step.

FIG. 8 is an operation flowchart of a seek test according to the present invention.

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

First, the head is positioned in the read test area (4) and a continuous following test is performed at a constant track position to check whether the head following servo is functioning normally (step). Next, a seek test is performed for each track (step). An effective method is to provide an appropriate delay during this time and test under the worst track following condition. Next, perform continuous repeated seek between certain tracks.
Perform a test (step). At this time, in the minimum seek (continuous seek for one track) test,
You can test whether the micro seek servo characteristics operate with a margin, or test the seek mode in which the seek speed reaches its maximum and then immediately decelerates to a certain track position.
In this test, a test mode that takes into account the characteristics of various servo mechanisms can be performed. 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). This completes the test for test area (4).
Next, the head is positioned in the read test area (3) (step). Again, 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 surface of the disk to test the overall seek operation (step). In this step, error analysis and failure points are pointed out.

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

It is desirable to perform this test last to prevent damage to the disk. First, a seek is made to an unwritten track in the write test area (2), the worst pattern is written, and an error check is performed (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 (2), and an error check is performed (step). Next, after changing the laser power and repeating the above procedure, an error analysis is performed and a defective location 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.

In addition, it is possible to protect the maintenance recording medium (CE disk) from the operating system, and conversely, by checking that test programs and inline programs are maintenance recording media during maintenance, user files can be protected. Since the user file can be protected, destruction of the user file 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 first reading the directory part, the area written by the additional recording type recording device can be determined, so that the area to be tested for writing can be quickly searched. Can also write test area,
By setting multiple readout test areas, you can test efficiently and accurately.
It becomes possible to significantly shorten maintenance time.

[Brief explanation of drawings]

FIG. 1 is a track format diagram of a maintenance recording medium showing one 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. Fig. 4 is a maintenance test macro flowchart according to the present invention, Fig. 5 is a maintenance test flowchart using a CE disk according to the present invention, and Fig. 6 is a common sequence for online test execution.
FIG. 7 is a flowchart of a read test according to the present invention, FIG. 8 is a flowchart of a seek test according to the present invention, and FIG. 9 is a 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 mechanism, 5: CE disk, 6: Service processor, 7: Program storage disk, 8:
Maintenance operation equipment.

Claims (1)

[Claims] 1 When data is written/read from a data processing device via a recording device and is accessed from the operating system in a maintenance recording medium using a destructive recording method that cannot be rewritten in the same location, the maintenance medium A display label area that identifies the area as being destructive, a directory area that displays the location of the area where destructive writing was performed, and a writing area that is distributed in multiple locations and does not contain data for writing tests. A maintenance recording medium characterized in that it comprises readout areas that are distributed at a plurality of locations and in which test patterns are recorded in advance for performing a readout test.