From: Stan Hoeppner <stan@hardwarefreak.com>
To: Michael Monnerie <michael.monnerie@is.it-management.at>
Cc: xfs@oss.sgi.com
Subject: Re: XFS hangs and freezes with LSI 9265-8i controller on high i/o
Date: Wed, 13 Jun 2012 11:12:15 -0500 [thread overview]
Message-ID: <4FD8BBDF.8060503@hardwarefreak.com> (raw)
In-Reply-To: <6637532.ZKYiNbq2uo@saturn>
On 6/13/2012 7:13 AM, Michael Monnerie wrote:
> Write Cache DISABLED if Bad BBU
This is the LSI/3ware firmware default policy Michael, so every user is
safe out-of-the-box. If the BBU/FBU is not present (never installed),
or the control logic determines it is not functioning properly, the
firmware disables writeback caching.
In absence of paying attention to logs/alerts, one will know pretty
quickly when the BBU has failed, as write performance with many/most
workloads will fall off a cliff.
--
Stan
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next prev parent reply other threads:[~2012-06-13 16:12 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-11 21:37 XFS hangs and freezes with LSI 9265-8i controller on high i/o Matthew Whittaker-Williams
2012-06-12 1:18 ` Dave Chinner
2012-06-12 15:56 ` Matthew Whittaker-Williams
2012-06-12 17:40 ` Matthew Whittaker-Williams
2012-06-13 0:12 ` Stan Hoeppner
2012-06-13 1:19 ` Dave Chinner
2012-06-13 3:56 ` Stan Hoeppner
2012-06-13 8:54 ` Matthew Whittaker-Williams
2012-06-13 11:59 ` Andre Noll
2012-06-13 12:13 ` Michael Monnerie
2012-06-13 16:12 ` Stan Hoeppner [this message]
2012-06-14 7:31 ` Michael Monnerie
2012-06-14 0:04 ` Dave Chinner
2012-06-14 14:31 ` Matthew Whittaker-Williams
2012-06-15 0:16 ` Dave Chinner
2012-06-15 9:52 ` Michael Monnerie
2012-06-15 12:29 ` Dave Chinner
2012-06-15 11:25 ` Bernd Schubert
2012-06-15 12:30 ` Dave Chinner
2012-06-15 14:22 ` Bernd Schubert
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