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    SubjectRe: document ext3 requirements
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    >>>>> "Pavel" == Pavel Machek <pavel@suse.cz> writes:

    Pavel> Does this sound like a fair summary?

    Pavel> Sector writes are atomic (ATOMIC-SECTORS)
    Pavel> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    I'd just like to point out that the all-or-nothing hardware sector
    atomity thing is -- to a large extent -- a myth.

    It is mostly true on SCSI class devices because various UNIX, RAID array
    and database vendors have spent many years leaning very hard on the
    drive manufacturers to make it so.

    But it's not a hard guarantee, you can't get it in writing, and it's not
    in any of the standards. Hybrid drives with flash had potential to
    close that particular loophole but those appear to be dead in the water.

    --
    Martin K. Petersen Oracle Linux Engineering



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