公开(公告)号：JPH0935397A

公开(公告)日：1997-02-07

申请号：JP17710195

申请日：1995-07-13

Applicant: IBM

Inventor： SUZUKI HIROMASA ,  KIBASHI AKIRA ,  YAMAMOTO YOSHIO ,  ASANO HIDEO

IPC: G11B23/50 ,  G11B5/00 ,  G11B5/012 ,  G11B5/54 ,  G11B5/55 ,  G11B5/58 ,  G11B19/04 ,  G11B21/08 ,  G11B21/21 ,  G11B19/02

Abstract: PROBLEM TO BE SOLVED: To eliminate the elementary cause of a thermal asperity by repeatingly perform a one directional seeking operation and eliminating a projected matter while actively bringing the surface of the structural body of a head into contact with the projected matter. SOLUTION: A head slider 20 is inclined with respect to the rotational direction of a disk by the air pressure accompanied by the revolution of the disk. The head slider 20 is brought into contact with the projected matter 52 on the disk 18 at the point of an ABS surface 44 nearest to the disk. Besides, for example, the number of loopings is defined to be two, seeking operations are completed when the loopings are repeated two times and a retry, that is, a rereading operation is executed to confirm whether a normal reading operation is performed or not. When the projected matter is eliminated by these seeking operations, since a read signal becomes normal and errors are recovered, this device can move to an ordinary reading or writing operation.

公开(公告)号：JPH10134516A

公开(公告)日：1998-05-22

申请号：JP28386096

申请日：1996-10-25

Applicant: IBM

Inventor： SAITO TAKAHIRO ,  KIBASHI AKIRA ,  OKADA KENJI ,  OZEKI HIDENORI

IPC: G06F3/06 ,  G11B20/10 ,  G11B20/12 ,  G11B20/18

Abstract: PROBLEM TO BE SOLVED: To minimize the reduction in a data transfer rate by arranging a spare sector at a position in a spare region located in each zone and is away from the disk center from the position of data in which a hardware error has been generated at least by a specific angle or more from the position of hard error being generated. SOLUTION: A zone 0 on a disk includes at least one spare track arranged at a center part in advance and a data region is divided into a data region 1 and a data region 2 by a spare track. When the zone 0 has a defective sector D, a spare track where a spare sector S is located is sought, the data of the spare sector S are read, and a track located at the next sector of the defective sector D is sought, thus reallocating the data of the sector D at the spare sector S at nearly the opposite side for the disk center in the spare track.

公开(公告)号：JPH10134528A

公开(公告)日：1998-05-22

申请号：JP28383196

申请日：1996-10-25

Applicant: IBM

Inventor： OZEKI HIDENORI ,  KIBASHI AKIRA ,  NISHINOMIYA HIROMI ,  SAITO TAKAHIRO

IPC: G11B19/04 ,  G11B20/18

Abstract: PROBLEM TO BE SOLVED: To efficiently execute ERP that is executed to prevent an error when reading a signal on a disk by grouping steps registered in an error recovery procedure(ERP) and selecting and executing a specific step out of the groups according to an error type. SOLUTION: In an ERP and its execution order change system, a host I/F 401 communicates with a host system and reports to a task handler 402 when it receives a command from the host. The task handier 402 sends a read/write system command to a read/write system processing mechanism 405 according to the command type and sends other commands to an other command processing mechanism 403. When an error occurs during a series of processing, a read/write manager 421 notifies of the location where an error occurred to an ERP routine 423 to execute ERP.

公开(公告)号：JP2002190184A

公开(公告)日：2002-07-05

申请号：JP2001286214

申请日：2001-09-20

Applicant: IBM

Inventor： ASANO HIDEO ,  COLEGROVE DANIEL JAMES ,  KIBASHI AKIRA ,  SATO MASAHIKO

IPC: H04N5/93 ,  G01V7/00 ,  G11B19/00 ,  G11B20/10 ,  G11B21/00 ,  G11B27/00 ,  G11B27/10 ,  H04N21/432 ,  H04N21/433 ,  H04N21/443 ,  H04N21/472

Abstract: PROBLEM TO BE SOLVED: To provide a method for realizing a stream link in a voice/image disk medium and a device for the method. SOLUTION: A voice/image stream is set up in a disk drive device, and consecutive data are accessed with a read command and a write command. When a main stream which has been established exists, the stream link is established by sending to the disk drive device a request for the stream link provided with the number of the main stream. A new stream takes over the starting address and ending address of the main stream. When the pointer of a linked stream gets ahead of the pointer of the main stream, a pointer-overrun warning is set.

公开(公告)号：DE10027359A1

公开(公告)日：2001-01-18

申请号：DE10027359

申请日：2000-06-02

Applicant: IBM

Inventor： KIBASHI AKIRA ,  ASANO HIDEO ,  COLEGROVE DANIEL J

IPC: G06F1/32 ,  G06F3/06 ,  G11B19/00 ,  G11B19/02 ,  G11B19/20 ,  G11B20/10 ,  G06F13/12

Abstract: Forecasting or estimating in advance the re-start time of a hard-disc drive system while the latter is in a waiting mode, where it is necessary to return the hard-disc drive from a standby mode into an active or useable mode, requires instructing the host system during the period preceding the restart, so that the host can terminate a task being finished off during this period, before the restart of the drive so that termination can be optimised by all the tasks being carried out in the total system, thus allowing considerable speeding up of data processing.

公开(公告)号：DE10050171B4

公开(公告)日：2006-01-05

申请号：DE10050171

申请日：2000-10-11

Applicant: IBM

Inventor： KANAMARU ATSUSHI ,  ASANO HIDEO ,  KIBASHI AKIRA ,  SAITO TAKAHIRO ,  KOBAYASHI KEIJI

IPC: G06F3/06 ,  G06F12/08 ,  G06F12/12

Abstract: A system and method are provided that reduce the amount of data held commonly in both high-ranking and low-ranking cache memories, thereby having each of those cache memories hold data more efficiently. More particularly, a computer system is provided with an HDC card 21 connected to an expansion bus 20 and an HDD unit 22 connected to the HDC card 21. The HDC card 21 is provided with a disk cache (high-ranking cache memory) and the HDD unit 22 is provided with a disk cache 54 (low-ranking cache memory). The HDC card 21 and the HDD unit 22 exchange select information for selecting a swap mode of each cache memory when the system is started up, thereby selecting different swap modes according to the exchanged select information respectively.

公开(公告)号：DE10050171A1

公开(公告)日：2001-04-19

申请号：DE10050171

申请日：2000-10-11

Applicant: IBM

Inventor： KANAMARU ATSUSHI ,  ASANO HIDEO ,  KIBASHI AKIRA ,  SAITO TAKAHIRO ,  KOBAYASHI KEIJI

IPC: G06F3/06 ,  G06F12/08 ,  G06F12/12

Abstract: Involves operating high order cache-memory and the low order cache-memory in different data 'exchange' modes. When a system is accelerated or run up to speed, an exchange of selected data for selecting a data 'exchange' mode for each cache-memory between the cache-memory of the high order and the cache-memory of the low order, takes place. Avoidance of errors in data storage in cache-memories used in computer systems based on hard-disc drives (HDDs) and with high and low order cache-memories being used and operated in different data 'exchange' modes, such as the least recently used (LRU) and least frequently used (LFU) modes, when a cache-memory has no free data storage locations available, involves operating the high order cache-memory and the low order cache-memory in different data 'exchange' modes, and when a system is accelerated or run up to speed, an exchange of selected data for selecting a data 'exchange' mode for each cache-memory between the cache-memory of the high order and the cache-memory of the low order, takes place..

公开(公告)号：SG55374A1

公开(公告)日：1998-12-21

申请号：SG1997003416

申请日：1997-09-15

Applicant: IBM

Inventor： SAITOH TAKAHIRO ,  KIBASHI AKIRA ,  OKADA KENJI ,  OHZEKI HIDEKI

IPC: G06F3/06 ,  G11B20/10 ,  G11B20/12 ,  G11B20/18 ,  G11B27/10

Abstract: A disk device and a method are described for reassigning data areas (e.g. sectors) which minimize the reduction in the data transfer rate when alternate data areas are used to replace defective areas. The disk device uses a plurality of data zones with spare areas allocated in each data zone. An alternate area is allocated (a) in the spare area within the data zone where the error occurs and (b) at an angular position offset more than a predetermined angle from a position of the data in which the error occurs. The offset angle allows the device time to seek to the alternate area, read the alternate area and seek back to the area following the defective area within a single rotation of the disk.