Patent ID: 7340652
Filing Date: 2008-03-04
Classification: G06F,Y10S

Abstract:
1. A method for rebuilding metadata in a data storage system having a storage control unit coupled to a host device through a host interface, the metadata formatted into one or more metadata tracks each containing information on customer data stored in one or more corresponding customer data tracks, the method comprising: detecting an occurrence of an error in metadata comprising a mismatch between a metadata track and an associated customer data track by detecting a warmstart for each of a plurality of customer data tracks; identifying a range of customer tracks in which the error is likely to have occurred; issuing a command through the host interface to invalidate the metadata associated with the identified range of customer tracks; invalidating the metadata associated with the identified range of customer tracks while the storage control unit remains on-line with the host device; and rebuilding the invalidated metadata tracks.