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    SubjectRe: Corruption Stats (fwd)
    Is that why my work NT system pauses during shutdown, and the pause is
    much longer then OS/2 used to? john alvord

    On Thu, 30 Jul 1998, Rob Hagopian wrote:

    > It's not true though, Apple had a BIG problem with this at one point -
    > they started shipping computers with the write cache enabled on the
    > internal drives (and it was about time). Of course, the Macs all have
    > software power-off (<ob Macs rule> ;-) and the file system would get
    > corrupted. IIRC, the solution was simply to delay long enough for the
    > caches to flush automaticly.
    > -Rob H.
    >
    > On Wed, 29 Jul 1998, Linus Torvalds wrote:
    >
    > > On Thu, 30 Jul 1998, Stefan Traby wrote:
    > > >
    > > > BTW: A drive following the SCSI-specs may cause disk-corruption
    > > > under Linux (WCE=1). Data may still be in write-cache after
    > > > shutdown and power-off. (I miss "synchronize cache").
    > > > This is for shure a theoretical problem, but a practical bug.
    > > > Or did I miss something ?
    > >
    > > No, you didn't miss anything.
    > >
    > > The thing has been discussed occasionally (very occasionally), and I don't
    > > know what the proper response is. According to some people the better
    > > drives make sure that they have enough rotational energy that they can
    > > make sure they get their data written out even after powerdown, but
    > > personally that sounds like science fiction to me (oh, I wouldn't be
    > > surprised if there are some drives that do it, but I'd be surprised if
    > > it's universal).
    > >
    > > Of course, Linux itself won't ever shut off the power, so it's more a
    > > matter of "when can you safely say 'System halted.'" than anything else.
    > > The kernel does support some shutdown features, but the disk is not on
    > > that list.
    > >
    > > Linus
    >
    >
    > -
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