JPS60205741A - Hard disc controller - Google Patents

Abstract

PURPOSE:To control the access to a sector similarly to a normal sector by forming an exchange area in a part of a hard disc storage medium and providing a sectors which is substituted for the sector where an error occur, in the exchange area. CONSTITUTION:If a sector where an error occurs exists in a data storage part of a hard disc storage medium in a hard disc controller, this sector is registered as an error destination sector number in a management item area of a corresponding to management area. Data which should be stored in this sector is stored in one sector of an exchange area CA, and this sector where data is stored in designated by an exchange destination sector number, which is stored in the management item area similarly to the error destination sector number, and is accessed. Thus, data is read out from said sector in the same manner as read-out of data from normal sectors.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a hard disk control device using a relatively large capacity hard disk storage medium.

[Technical background of the invention and its problems] There are devices that use hard disks such as Winchester disks as storage media, but since such hard disks have a large storage capacity of several tens of megabytes, some of them are physically There is a problem that even if an error occurs, other memory parts become useless and cannot be easily replaced. However, if left as is, an error would occur every time the location with the physical error was accessed, posing a problem in use.

[Purpose of the Invention] This invention was made to solve such problems, and the hard disk record 1! If an error occurs by forming an exchange area on a part of the medium, a sector may be created in place of the raw sector for error 5 in a part of the master operation area (
Particularly, the purpose is to provide a hard disk drive system that has normal sectors as well as AVIS system tall or large sectors.

[Summary of the Invention 1 This invention (well, a hard disk/isk control device that provides one hard disk storage medium with a relatively large capacity and controls data access to that hard disk storage medium?++ In addition to forming a replacement area in the event of an error in a part of the hard disk storage medium, the hard disk KL 'lfl US! Forming a plurality of 13-phase buried areas by pairing the exchange uplink I that is acknowledged on behalf of the designated sector with the exchange destination and lid number that designates the lid,
Bar 1 When an error occurs while accessing data to the storage medium, compare the number of the sector in which the error occurred with the error destination sector number in the management area.
．． Data access is performed based on the exchange destination sector number that is paired with the error destination sector number that matches the error sector number.

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

In FIG. 1, 1 is a microprocessor, 2 is a hard disk device, 3 is a hard disk interface that controls data exchange between the microprocessor 1 and the hard disk device 2, and 4 is a RAM (Random Access Memory).
memory). The microprocessor 1 accesses the hard disk storage v1. of the hard disk device 2 via the hard disk interface 3. The book is accessed, and the extracted data is stored in the RAM 4. Further, the data stored in the hard disk storage medium of the hard disk device 2 is also stored in the RAM.
I am trying to read from 4.

The hard disk storage medium is, for example, as shown in FIG.
J:tsul:41RJノ/\ツFl-It)O, IDI
, HD2.

1-I D 3 'c' Akhis ↑l Fre0
From the shilling to 199 shillings (20 of Kawauchi's cylinders are Natsu C. One track is concatenated to 256 har C1 with 7/sec C'32 sectors. , I-IDI, l-102, t1
1 in the inner mouth of 200 shillings with 1 access in o3
Accepted with 0, 4 shillings from the end,? l straw 196=19
9 series]/da are formed in the intersection 1 area c A and C. ,
Target/\Tsudo l-I D The O cylinder that is activated by the OC is connected to the bone and the pull area IA, as shown in Figure 413, 32
T? Although it is standard, it has 18 tracks per track. This index 1 rear IA is provided with a section that zeroes out the exchange area CΔ, and is also called LINK~+AP, and stores information based on the fact that this disk performs special processing. In other words, LINKfvlAP is formed in the 0tl-lid, which is the first sector of IJ, and has the η configuration shown in FIG. 4. Note that when sector 0 is in an error state, sector 1, sector 2, and so on are used one by one in sequence.

In the LINKM'AP, a character code such as f' TE CL I N K M A P J is stored in 1 Gbyte 1- from the beginning, J3, and 8 from the 17th byte.
In the 0th byte, sector numbers of the management area are stored in item areas IM1 to Ifv11G each having a 4-byte configuration. As shown in FIG. 5, each item area lM1 to IM16 has the first two bytes as a cylinder number area, the first byte as a head number area, and the last byte as a record number area. Sixteen sectors are managed by each item area IM1 to IM1G. The item area I M 1 to I
M16 manages information regarding the head HDO in areas IMI to IM4, and areas Ifv15 to IM8 manage information regarding the head HDO.
Manage information related to DI and manage areas 1~19~IM12
manages the information sent to the head t (D2), and the area IM1
3 to Ifvl16 manage information regarding the head HD3. The part formed in the index area IA that manages the exchange area CA is called a management area, and this management area consists of a total of 31 sectors of 4 sectors for each head HDO to HD3.
16 sectors are allocated, and each sector has 8 bytes per item as shown in Figure 6 (32 management item areas IvllA1, MIA2, N-11A3, . . . MI
A32 is formed. Follow C each head 1 (D〇-1
- There will be 128111 management item areas for each ID3. As shown in FIG. 7, each of the management item areas has the upper four bytes (f1) to (f1) of the eight bytes as the replacement sector number area, and the lower four bytes (1-) to the error destination sector number area. The first two hits of the exchange destination 1^ information stored in the exchange destination sector number area are flags, and when this flag is [00-, it is exchanged and the lid is not used, and when it is "01", it is an error. The exchange sector at the "11" tosaha, which is linked to the lid, is 1 lar L/'U
Hikomi says that he is there.

The microphone 110 is configured to perform the reprogramming process shown in FIGS. 8 and 9. That is, negative 1
As shown in Figure 8, when the power is turned on, the O sector of the index area 1△ is read out. Then, it is checked whether the sector is in the 1 error state. If there is an error state, the sector number is counted up by '1' and then one sector of the index area IA is read out. 3 read out in this way
If both sectors are in an error state, they are treated as errors. However, if the read sector is normal, then it is checked whether the read sector has a character code of rTEcLINK to IAPJ.

If there is no character code, read the next sector.

Further, if there is a character code of rTEcLINK to IAPJ, a management area creation process is performed. This process refers to the sector numbers of each item area IM1 to IM1G and
-14, the information of each management item area of the management area is read and stored. When this process is completed, the routine moves to other various processes.

FIG. 9 shows data read processing, in which data is first read from the hard disk storage medium of the hard disk device 2. If no error occurs at this time, it is determined that there is a sufficient amount of memory, and the process ends. Also,
When an error occurs, the top pointer of the item area to be processed from the item area at that time is transferred to the RA.
jvl 4 Sera I-riru. Next, the sector number where the error actually occurred is 1r! [Mouth] - Compare the errors in the riff and the numbers. This comparison is carried out by changing management item 1j' until both become clear, and if 128
Compare C times, and if they do not match, it is determined that there is no sector in which the error occurred in the 128 pipe J A J n lower areas corresponding to L\rad, and the error is processed using VJi L.
Also, there is a match (Rushin or 8'r is that -rQ L, and the flag at the beginning 2L' of the first 2L's of the first cross is 101 in the -rQ L filled item area), but -C is there? If it is other than "01", this intersection is not for this purpose.
-U is c +'r'') ri ``T filled item 7 change (make the next comparison 1j. 3Ll flag becomes ``01'', then process item - [sj') RAIL=+ the exchange destination sector number from the seven destination sector number area
Read out to 4. Then, processing for extracting j data from the exchange area CA is performed from 1j to 1j based on the exchange destination name.

In the device according to the embodiment of the present invention configured as described above, even if an error occurs in the data storage section of the hard disk storage medium, the sector is registered as the error destination sector number in the constant item area of the corresponding processing area. If the error occurs, the data to be stored in the sector where the error occurred will be stored in any sector of the exchange area CA, and that sector will be stored in the exchange destination sector number that is also stored in the management item area where the error destination sector number is stored. Therefore, on the surface, data can be read without causing the same problem as when data is not read from a normal sector. Therefore, when Korg uses this hard disk, it can use it without being aware that there are sectors in which errors have occurred. Therefore, heart ice cream 21
The 1W body can be used effectively without waste. Also,
LINKMAR is designed so that even if the O sector, which is the first sector, has an error, it can be used later by 1t7 sectors, 2 sectors, etc., so the backup for the management area is sufficient and the hard disk storage medium is not wasted. It can be used effectively without any problems. Additionally, the 111x rear can be specified as a free sector in LINKNIAP, so avoid the 1:t large area.
-(IJ9 is good because it can be used and there is no need to worry about not being able to secure a space.)

In 15.11 and other records, all J-ria are 9256 ha (1. Pof
- If the part of the sector that stores data is 1024 bars per sector (14), then (-t) can be applied.
In this case, it is better to manage four sectors by using a 1t-lid and a 256-byte b3-coniliar. 1. In other words, if there are multiple formats i/systems on the hard disk storage medium (even if there are 139 formats), and A-matsu I- is a 256-byte integer 10, then 256 pies 1 to 7 are stored in the management area. This can be handled by registering the position i converted into a sector.

[Effects of the Invention] As described in detail above, according to the present invention, by forming a replacement area in a part of the hard disk storage medium, when there is an error-occurring sector, the replacement area is replaced with the error-occurring sector. 1 is created in the access control like a normal sector, and the hard disk record fi! Hard disk system that allows you to use the II body without wasting it
II device can be provided.

[Brief explanation of the drawing]

The figures show an actual example of the present invention, and FIG. The figure shows the memory configuration of LINKMAP, Figure 5 shows the memory configuration of LINKMAP item area, Figure 6 shows the memory II4 configuration of the management area, and Figure 7 shows the management area. A diagram showing the memory configuration of the management item area in the area, FIG.
FIG. 9 is a flowchart showing the program processing when the power is turned on, and FIG. 9 is a flowchart showing the program processing when the microprocessor reads data. 1... Ma, Iklob Outsuri, 2... Hard disk 11i! , IA...index area, CA...exchange area, 1M1~■~11G...LINKMAR item area, MIAI~N=IIA32...management area whistle 311! Jj' (eye area) Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 3

Claims (1)

[Claims] In a hard disk control device that is provided with a hard disk storage medium of relatively large capacity and controls access to C data to the hard disk storage medium, a part of the hard disk storage medium is formed with an exchange area in the event of an error, and the A hard disk record 'vAW', an error destination sector number indicating the sector in which an error has occurred in the hard disk drive, and an exchange destination number indicating the sector in the exchange area to be accessed in place of the sector indicated by the error destination sector number. as a pair (multiple storage J
If 15- occurs in the theta's Achis O'i for the hard disk storage medium, compare the no bar on the lid with the error number in the management area, and check the error. A hard disk control II characterized in that data is accessed based on a replacement destination sector number that is paired with an error destination sector number that matches the number of the sector that has failed.
Device.