公开(公告)号：JPH10161818A

公开(公告)日：1998-06-19

申请号：JP30774396

申请日：1996-11-19

Applicant: IBM

Inventor： SUZUKI HIROMASA ,  ASANO HIDEO ,  TOBARI ATSUSHI ,  NISHINO SATOSHI ,  YAMADA HIDEJI ,  ANDO HARUO ,  KOWA TSUGUAKI

IPC: G06F3/06 ,  G06F11/00 ,  G11B19/00 ,  G11B19/04 ,  G11B20/00 ,  G11B20/10 ,  G11B20/18

Abstract: PROBLEM TO BE SOLVED: To provide a method/device which can assure execution of an ERP (error recovery procedure) up to its last step regardless of the time needed up to the time-out of an instruction and can more surely recover an error. SOLUTION: A disk device carries out an ERP up to its last step or until an error is recovered with no interruption when a reset instruction is received during execution of the ERP. In another mode, the disk device stops execution of the ERP and also holds the number K of the step whose execution is over right before reception of a reset instruction when this instruction is received during execution of the ERP. Then the disk device successively carries out the ERP from the (K+1)th error recovery step when a retry instruction is received.

公开(公告)号：JP2000123492A

公开(公告)日：2000-04-28

申请号：JP29095798

申请日：1998-10-13

Applicant: IBM

Inventor： OSAWA TOYOZO ,  KOBAYASHI KEIJI ,  KOWA TSUGUAKI ,  HASHIMOTO SATOSHI

IPC: G11B20/12 ,  G11B5/012 ,  G11B5/09 ,  G11B19/02

Abstract: PROBLEM TO BE SOLVED: To provide a disk type recording medium, a disk drive device, and the like that yield can be improved, complexness of control can be reduced, and reduction of performance can be suppressed. SOLUTION: Recording line density of a recording plane (e.g. 1c) of which a software error rate(SER) is bad is reduced, and recording line density of recording planes (e.g. 1a, 1b, 1d, 1e, 1f) of which SER is not so bad is increased. A control section 4e or a control section 5a changes a table in accordance with recording line density of each recording plane 1a-1f at the time of recording and reproducing, and changes recording and reproducing characteristics.

公开(公告)号：SG74027A1

公开(公告)日：2000-07-18

申请号：SG1997003791

申请日：1997-10-18

Applicant: IBM

Inventor： SUZUKI HIROAKI ,  ASANO HIDEO ,  TOBARI ATSUSHI ,  NISHINO SATOSHI ,  YAMADA SHUJI ,  ANDOH HARUP ,  KOWA TSUGUAKI

IPC: G06F3/06 ,  G06F11/00 ,  G11B19/00 ,  G11B19/04 ,  G11B20/00 ,  G11B20/10 ,  G11B20/18

Abstract: An error recovery procedure (ERP) in a storage device such as a rotating magnetic hard disk drive is executed to the last step regardless of the established time-out period for an instruction, thereby more reliably recovering from errors. In accordance with one embodiment of the invention, when a disk drive receives a reset instruction from a host during the execution of an ERP, it executes the ERP until the error is recovered, or to the last step without interrupting the ERP. Further, in accordance with another embodiment of the invention, when a disk drive receives a reset instruction during the execution of an ERP, it stops execution of the ERP and holds the number K of the step which was completed immediately before stopping, and when receiving a retry instruction after that, sequentially executes the ERP from the K+1-th error recovery step.