From: Stan Hoeppner <stan@hardwarefreak.com>
To: linux-raid@vger.kernel.org
Subject: Re: /dev/md2 stopped after changing SAS controller
Date: Sat, 14 May 2011 10:03:44 -0500 [thread overview]
Message-ID: <4DCE99D0.1010900@hardwarefreak.com> (raw)
In-Reply-To: <20110513202900.GA1926@apartia.fr>
On 5/13/2011 3:29 PM, Louis-David Mitterrand wrote:
> I've been having very bad performance with an LSISAS2008 controller
> attached to 8 WD Caviar Black 1TB disks.
What is the nature of this 'very bad performance'? Did you recently
upgrade kernel/driver and run into a regression? If not, either the HBA
has developed a circuit defect, or the problem lies elsewhere, either a
backplane/cabling issue, or a drive going south.
Do you have any log entries showing problems with the LSI HBA? Drive
errors? What does smartctl tell you about each drive?
Usually when HBAs fail, they fail, period. They don't typically show
continuously degrading performance until totally failing.
I'll be interested to know if swapping the LSI for the Adaptec fixes the
'very bad performance' issue.
--
Stan
next prev parent reply other threads:[~2011-05-14 15:03 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-13 20:29 /dev/md2 stopped after changing SAS controller Louis-David Mitterrand
2011-05-13 21:33 ` NeilBrown
2011-05-14 8:21 ` Louis-David Mitterrand
2011-05-14 8:27 ` CoolCold
2011-05-14 8:36 ` Roman Mamedov
2011-05-14 8:41 ` CoolCold
2011-05-14 11:58 ` NeilBrown
2011-05-14 12:06 ` Roman Mamedov
2011-05-14 13:00 ` David Brown
2011-05-14 14:19 ` Louis-David Mitterrand
2011-05-14 15:03 ` Stan Hoeppner [this message]
2011-05-14 15:18 ` Louis-David Mitterrand
2011-05-14 18:19 ` Stan Hoeppner
2011-05-14 19:15 ` Louis-David Mitterrand
2011-05-14 23:40 ` Stan Hoeppner
2011-05-15 7:26 ` Mikael Abrahamsson
2011-05-15 14:29 ` Joe Landman
2011-05-15 14:37 ` Louis-David Mitterrand
2011-05-16 6:12 ` Stan Hoeppner
2011-05-16 9:27 ` Leslie Rhorer
2011-05-16 5:01 ` Stan Hoeppner
2011-05-16 4:43 ` Stan Hoeppner
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