Browse Prior Art Database

Error Log for Reassigned Entry

IP.com Disclosure Number: IPCOM000123046D
Original Publication Date: 1998-Apr-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 1 page(s) / 20K

Publishing Venue

IBM

Related People

Andoh, H: AUTHOR [+1]

Abstract

Disclosed is a method to log the Reassign history to analyze it later.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Error Log for Reassigned Entry

      Disclosed is a method to log the Reassign history to analyze it
later.

      512 bytes of memory is reserved for this Error Log.  And the
error information, for example,
  - Error LBA
  - Error Code
  - Error Status
  - Retry Count
  - Time Stamp
  are collected to the memory area and are saved to reserved area of
media before Reassign.  A pointer for this Error Log is also updated
for next Reassign.

      At every time that the pointer exceeds 512 bytes boundary, the
memory area is initialized.  And the destination LBA of reserved area
of media to save the Error Log is calculated as below.

    Assumption : Start LBA of reserved area of media is FE0000h
   Pointer   Destination LBA   Block
   -------   ---------------   -----
    0080h       FE0000h          1
    0310h       FE0001h          1
    8450h       FE0042h          1

      This method is not only for Reassign history but for anything
to be logged.