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    SubjectRe: [PATCH] 64 bit scsi read/write
    Date
    On Saturday 14 July 2001 16:50, Chris Wedgwood wrote:
    > On Sat, Jul 14, 2001 at 09:45:44AM +0100, Alan Cox wrote:
    >
    > As far as I can tell none of them at least in the IDE world
    >
    > SCSI disk must, or at least some... if not, how to peopel like NetApp
    > get these cool HA certifications?

    Atomic commit. The superblock, which references the updated version
    of the filesystem, carries a sequence number and a checksum. It is
    written to one of two alternating locations. On restart, both
    locations are read and the highest numbered superblock with a correct
    checksum is chosen as the new filesystem root.

    --
    Daniel
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