From: Douglas Gilbert <dougg@torque.net>
To: Matthew Jacob <lydianconcepts@gmail.com>
Cc: "bloch@verdurin.com" <bloch@verdurin.com>,
linux-scsi@vger.kernel.org, linux-precision@dell.com
Subject: Re: Very slow writes with mptsas
Date: Wed, 06 Jun 2007 20:06:24 +0200 [thread overview]
Message-ID: <4666F7A0.8080605@torque.net> (raw)
In-Reply-To: <7579f7fb0706052232x44db1f7he88a50646a3c57db@mail.gmail.com>
Matthew Jacob wrote:
> The FreeBSD problem was fixed by Scott Long a couple of days ago by
> doing some cut through SAS stuff that enabled Write Cache for SATA
> drives. Why LSI-Logic couldn't just blitheringly synthesize mode page
> 8 is beyond me, but okay.
>
> I dunno whether the issue here is the same one Scott tackled- probably
> given the messages. Eric- you listening in on this?
Matt,
Just in case Eric doesn't answer, I suspect if the
HBA firmware can be upgraded (from Dell or LSI?) then
WCE (write cache enable) in the caching mode page
will be supported. It is one of the few mode page
settings that is required to be implemented in SAT.
The other field that should be changeable is DRA
(disable read ahead). Both work on my LSI SAS HBA.
Doug Gilbert
next prev parent reply other threads:[~2007-06-06 18:06 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-05 16:16 Very slow writes with mptsas bloch
2007-06-06 5:32 ` Matthew Jacob
2007-06-06 18:06 ` Douglas Gilbert [this message]
2007-06-07 21:42 ` bloch
2007-06-07 22:23 ` Moore, Eric
2007-06-12 14:15 ` bloch
2007-06-20 17:30 ` Douglas Gilbert
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