From: Max Waterman <davidmaxwaterman+gmane@fastmail.co.uk>
Cc: linux-raid@vger.kernel.org
Subject: Re: md faster than h/w?
Date: Mon, 16 Jan 2006 13:33:39 +0800 [thread overview]
Message-ID: <43CB3033.8070803@fastmail.co.uk> (raw)
In-Reply-To: <43CB2314.5000203@fastmail.co.uk>
Max Waterman wrote:
>
> Then I unmount /dev/sdb and it's back up to 155MB/s !?!?!
>
> It's not making any sense to me :(
>
OK, the 'hdparm -t' numbers are always low for a device that is mounted.
i.e. an unmounted device gets 3-4 times the bandwidth of a mounted device.
Of course, bonnie++ only works on mounted devices, but gives me
reasonable (but not great) numbers (130MB/s) which don't seem to vary
too much with the kernel version.
Max.
next prev parent reply other threads:[~2006-01-16 5:33 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-13 7:06 md faster than h/w? Max Waterman
2006-01-13 14:46 ` Ross Vandegrift
2006-01-13 21:08 ` Lajber Zoltan
2006-01-14 1:19 ` Max Waterman
2006-01-14 2:05 ` Ross Vandegrift
2006-01-14 8:26 ` Max Waterman
2006-01-14 10:42 ` Michael Tokarev
2006-01-14 11:48 ` Max Waterman
2006-01-14 18:14 ` Mark Hahn
2006-01-14 1:22 ` Max Waterman
2006-01-14 6:40 ` Mark Hahn
2006-01-14 8:54 ` Max Waterman
2006-01-14 21:23 ` Ross Vandegrift
2006-01-16 4:37 ` Max Waterman
2006-01-16 5:33 ` Max Waterman [this message]
2006-01-16 14:12 ` Andargor
2006-01-17 9:18 ` Max Waterman
2006-01-17 17:09 ` Andargor
2006-01-18 4:43 ` Max Waterman
2006-01-16 6:31 ` Max Waterman
2006-01-16 13:30 ` Ric Wheeler
2006-01-16 14:08 ` Mark Hahn
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