Re: Very slow writing to SATA disk

ray_at_redshift.com
Date: 10/28/05

  • Next message: Robert Watson: "Re: how to make the FreeBSD 6.0 run faster" 
    Date: Fri, 28 Oct 2005 02:55:32 -0700
To: Peter Jeremy <PeterJeremy@optushome.com.au>, "Mikhail T." <mi@aldan.algebra.com>

    At 07:48 PM 10/28/2005 +1000, Peter Jeremy wrote:
    | On Fri, 2005-Oct-28 01:18:03 -0400, Mikhail T. wrote:
    | >I've got a new Hitachi drive with 16Mb of cache:
    | >
    | > ad8: 476940MB <HDS725050KLA360 K2AOA11A> at ata4-master SATA150
    | >
    | >and am trying to use it to store backups online. Unfortunately, writing
    | >to the disk is painfully slow (by today's standards) -- it can barely
    | >keep 7Mb/second and my other (SCSI) disks run circles around it.
    |
    | If this drive doesn't support tagged-queueing, is the write cache
    | disabled? I get that sort of performance from a (PATA) disk with
    | the cache disabled (hw.ata.wc="0" in loader.conf)
    |
    | >According to smartctl, the drive runs at 56C during the copying. Its
    | >idle temperature seems to be 54C.
    |
    | I'd double-check that (eg with a finger). If the drive really is
    | running at 56°C, it won't last very long.
    |
    | --
    | Peter Jeremy

    I just checked the temp on my workstation for comparison. It's running two SATA
    drives (74GB Raptors) and the temp on those drives is 30C/86F. Like Peter says,
    at 133F, I don't think they would last very long, not to mention you'd probably
    smell something hot/burning.

    Ray

     

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  • Next message: Robert Watson: "Re: how to make the FreeBSD 6.0 run faster"

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