Method and apparatus for dynamic bad disk sector recovery
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United States of America Patent
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N/A
Issued Date -
Jul 1, 2004
app pub date -
Oct 6, 2003
filing date -
Nov 6, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An automatic process for recovering bad disk sectors by providing improved error handling and recovery of data, maintains disk data consistency, and relocates data structures from bad disk sectors. A bad-sector-mapping (BSM) table to correspond to a reserve sector space in the disk. In one embodiment, the BSM includes N entries for N reserved sectors in the bottom space of a disk. The content of each table entry contains two fields: a header and an address. There are three flag bits being defined in a head field, with each flag bit being used to specify status of how a bad sector occurred. The address field stores a disk offset for identifying the location of data stored in the disk. The last entry of the map table, or the last n+1 entry, is a checksum entry.
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