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    SubjectRe: sync: why disk cannot spin down


    Russell King wrote:

    > Xuan Baldauf writes:
    > > this problem is possibly unrelated to reiserfs but related to
    > > linux-kernel, but now I can prove it: regular sync()s do prevent the
    > > spindown of (IDE) disks. There will be a call to sync() after 32 or less
    > > seconds have elapsed since the last sync(). Not a problem itself, but
    > > every sync spins up the disk again.
    >
    > You may want to have a look at the atime/diratime mount options, or
    > even chattr -A to prevent certain files causing a write when they're
    > run/read.
    >
    > Note that just executing "sync" causes its atime to be marked for update,
    > which will cause a write back to disk a short while later.
    >
    > [...]

    Thank you for waking me! :o) I forgot the atime issue. I wonder why it still
    is the default...

    >
    > | | | | http://www.arm.linux.org.uk/~rmk/aboutme.html / / |

    Just FYI: 404 Not Found

    Thanx,
    Xuân. :o)



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