From: Mike Fedyk <mfedyk@matchmail.com>
To: Mark Cooke <mpc@star.sr.bham.ac.uk>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Raid5 resync slow with one linear array
Date: Tue, 2 Apr 2002 16:52:44 -0800 [thread overview]
Message-ID: <20020403005244.GE952@matchmail.com> (raw)
In-Reply-To: <20020402022822.GA961@matchmail.com> <Pine.LNX.4.44.0204020630140.1152-100000@pc24.sr.bham.ac.uk>
On Tue, Apr 02, 2002 at 06:35:29AM +0100, Mark Cooke wrote:
> Hi Mike,
>
> Have you checked individual transfer rates to the drives / md devices ?
Each drive transfers 18-20MB/sec, and all have been tested with badblocks -w.
>
> I saw (non-reproducible unfortunately) a bad-transfer rate between one
> of my drives in an ide raid setup, where the drive was only pushing ~
> 2MB/sec, even after being explictly zapped with hdparm. A power cycle
> fixed it, and it hasn't happenned since.
>
Hmm, I don't think I'm dealing with bad hardware. All are SCA SCSI and tested.
> Did you try building it with different chunk sizes ?
>
No, my root filesystem is on this array. I think 32k chunks are ok.
Mike
next prev parent reply other threads:[~2002-04-03 0:51 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-04-02 2:28 Raid5 resync slow with one linear array Mike Fedyk
[not found] ` <Pine.LNX.4.44.0204020630140.1152-100000@pc24.sr.bham.ac.uk>
2002-04-03 0:52 ` Mike Fedyk [this message]
[not found] ` <Pine.LNX.4.44.0204042255040.8182-100000@pc24.sr.bham.ac.uk>
2002-04-04 22:04 ` Mike Fedyk
2002-04-04 4:03 ` Neil Brown
2002-04-04 22:56 ` Mike Fedyk
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