From: Max Waterman <davidmaxwaterman+kernel@fastmail.co.uk>
To: linux-kernel@vger.kernel.org
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Subject: Re: io performance...
Date: Fri, 20 Jan 2006 12:09:14 +0800 [thread overview]
Message-ID: <43D0626A.2090802@fastmail.co.uk> (raw)
In-Reply-To: <1137679698.8471.30.camel@localhost.localdomain>
Alan Cox wrote:
> On Iau, 2006-01-19 at 21:14 +0800, Max Waterman wrote:
>> So, if I have my raid controller set to use write-back, it *is* caching
>> the writes, and so this *is* a bad thing, right?
>
> Depends on your raid controller. If it is battery backed it may well all
> be fine.
Eh? Why?
I'm not sure what difference it makes if the controller is battery
backed or not; if the drives are gone, then the card has nothing to
write to...will it make the writes when the power comes back on?
Max.
next prev parent reply other threads:[~2006-01-20 4:09 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <5vx8f-1Al-21@gated-at.bofh.it>
[not found] ` <5wbRY-3cF-3@gated-at.bofh.it>
[not found] ` <5wdKh-5wF-15@gated-at.bofh.it>
2006-01-19 1:58 ` io performance Robert Hancock
2006-01-19 13:14 ` Max Waterman
2006-01-19 14:08 ` Alan Cox
2006-01-20 4:09 ` Max Waterman [this message]
2006-01-20 4:27 ` Alexander Samad
2006-01-20 12:52 ` Alan Cox
2006-01-19 11:39 Al Boldi
-- strict thread matches above, loose matches on Subject: below --
2006-01-16 7:35 Max Waterman
2006-01-16 7:32 ` Jeff V. Merkey
2006-01-17 13:57 ` Jens Axboe
2006-01-17 19:17 ` Jeff V. Merkey
2006-01-16 8:35 ` Pekka Enberg
2006-01-17 17:06 ` Phillip Susi
2006-01-18 7:24 ` Max Waterman
2006-01-18 15:19 ` Phillip Susi
2006-01-20 5:58 ` Max Waterman
2006-01-20 13:42 ` Ian Soboroff
2006-01-25 6:36 ` Max Waterman
2006-01-25 14:19 ` Ian Soboroff
2006-01-25 13:09 ` Bernd Eckenfels
2006-01-18 3:02 ` Max Waterman
2006-01-18 4:30 ` Jeff V. Merkey
2006-01-18 5:09 ` Max Waterman
2006-01-18 4:37 ` Jeff V. Merkey
2006-01-18 7:06 ` Max Waterman
2006-01-18 9:21 ` Alan Cox
2006-01-18 15:48 ` Phillip Susi
2006-01-18 16:25 ` Bartlomiej Zolnierkiewicz
2006-01-19 0:48 ` Adrian Bunk
2006-01-19 13:18 ` Max Waterman
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