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    Multiple copy track stage recovery in a data storage system
    1.
    发明申请
    Multiple copy track stage recovery in a data storage system 失效

    公开(公告)号：US20060155718A1

    公开(公告)日：2006-07-13

    申请号：US11031170

    申请日：2005-01-07

    申请人： Suguang Li ,  David Mannenbach ,  Karl Nielsen ,  Richard Stelmach

    发明人： Suguang Li ,  David Mannenbach ,  Karl Nielsen ,  Richard Stelmach

    IPC分类号： G06F7/00

    CPC分类号： G11B20/1803 ,  G11B20/1816 ,  G11B2220/412 ,  Y10S707/99953

    摘要： A bad track in a disk device in a data storage system is recovered by determining which cluster in the system the bad track belongs to. If the track belongs to the cluster that discovered that the track was bad, that cluster recovers the track by locating a good copy of the track, staging the good copy of the track to cache, and destaging the good copy of the track storage unit from the cache to all copies of the track, whether good or bad, in the data storage system. If the track belongs to another cluster, the cluster that discovered that the track was bad sends a message to the other cluster to inform it of the bad track, and the other cluster recovers the bad track. In another aspect, all tracks are owned by one server or server cluster, which performs the staging and destaging.