atacontrol rebuild and iostat

From: Putinas Piliponis (pilkis_at_gmx.net)
Date: 02/03/04

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    To: <current@freebsd.org>
Date: Tue, 3 Feb 2004 03:23:12 +0200

    Hmm, another notice...
    I created array, right now it's rebuilding

    atacontrol status ar0
    ar0: ATA RAID1 subdisks: ad4 ad6 status: REBUILDING 3% completed

    to check is it really doing what I expect I run
    iostat ad4 ad6 1
    and I see 0 transfer to devices:
    pilkis@freebsd:/usr/src# iostat ad4 ad6 1
          tty ad4 ad6 cpu
     tin tout KB/t tps MB/s KB/t tps MB/s us ni sy in id
       1 1219 0.50 0 0.00 0.50 0 0.00 17 0 6 1 76
       0 180 0.00 0 0.00 0.00 0 0.00 0 0 2 3 96
       0 60 0.00 0 0.00 0.00 0 0.00 0 0 2 2 97
       0 60 0.00 0 0.00 0.00 0 0.00 0 0 2 2 95
       0 60 0.00 0 0.00 0.00 0 0.00 0 0 0 0 99
       0 60 0.00 0 0.00 0.00 0 0.00 1 0 1 2 96

    to be sure what I didn't miss something I also run
    iostat ar0
    also no transfers 0.00MB/s

    Why nothing ?

    ----- Original Message -----
    From: "Doug White" <dwhite@gumbysoft.com>
    To: "Putinas Piliponis" <putinas.piliponis@icnspot.net>
    Cc: <current@freebsd.org>
    Sent: Tuesday, February 03, 2004 00:36
    Subject: Re: atacontrol problems

    > On Mon, 2 Feb 2004, Putinas Piliponis wrote:
    >
    >> just playing with raids on 5.2.1-RC
    >> atacontrol create RAID1 ad6 ad6
    >> ar0 created
    >> atacontrol detach 3
    >> gives panic
    >
    > Feeding invalid configurations to ATA RAID is a good way to end up with a
    > bloody foot. It would be nice to sanity-check something like that,
    > though.
    >
    > ATARAID is known to not be wonderfully stable in the face of bizarre
    > setups and failure; its a known limitation. The future plan is to replace
    > the current framework with something more robust.
    >
    > --
    > Doug White | FreeBSD: The Power to Serve
    > dwhite@gumbysoft.com | www.FreeBSD.org
    > _______________________________________________
    > freebsd-current@freebsd.org mailing list
    > http://lists.freebsd.org/mailman/listinfo/freebsd-current
    > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org"
    >
    >

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