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    SubjectRe: safe file systems
    Actually, Apple got bitten by this one a little while ago... Because they
    actually turn off the whole system on a shutdown command, the
    internal hard drive loses power too. Some Quantum drives they shipped had
    write caching turned on, and the power would cut out before the cache was
    flushed on the drive!
    -Rob H.

    On Wed, 24 Sep 1997, David S. Miller wrote:

    > From: (Larry McVoy)
    > Date: Wed, 24 Sep 1997 12:22:23 -0700
    > The default on every SCSI & FC disk I've ever seen (and I've seen a
    > fair number including drives from HP, Seagate, Quantum, IBM,
    > Maxstor, and probably others I'm forgetting) is to /not/ do write
    > caching. If the drive says the write is done, it is done.
    > Sort of. I know there are drives which write cache, but only do so
    > such that the energy from the spindown from a power failure is 2 or 3
    > times more than would be needed to do the last minute flush of any
    > cached writes.
    > Later,
    > David "Sparc" Miller

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