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System and method for reducing unrecoverable media errors in a disk subsystem

  • US 7,447,938 B1
  • Filed: 05/03/2007
  • Issued: 11/04/2008
  • Est. Priority Date: 04/24/2003
  • Status: Expired due to Term
First Claim
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1. A system for reassigning a sector encountering a recoverable error comprising:

  • a reassignment utility for recognizing a recoverable error on a storage device in response to an I/O operation and providing a reassignment status indicator to a storage layer included in a storage operating system; and

    in the storage layer, a mechanism that determines whether the storage device is in a degraded state and adapted to reassign a sector encountering the recoverable error to a spare sector if the storage device is not in a degraded state and to store the I/O operation in a log to reassign to the spare sector at a future time if the disk is in a degraded state.

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