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    SubjectRe: I/O problem with sustained writes
    Collectively Unconscious wrote:
    > We are having a problem with writes.
    > They start at 14 M/s for the first hour and then drop to 2.5 M/s and stay
    > that way. Reads do not seem effected and we've noticed this on the 2.2.16,
    > 2.2.17, 2.2.18 and now the 2.2.19pre11 kernels.
    > These are SMP P-IIIs from 450 to 800 MHz. Redhat 6.2

    I've seen something similar on Seagate ST313021A IDE drives.
    After a few minutes their read throughput falls from 20
    megs/sec to about 5. Issuing *any* drive-setting command
    brings the throughput back. Even a command which the disk
    doesn't support.

    So I have a cron job which runs `hdparm -A1' once per minute.

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