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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=43CB3033.8070803@fastmail.co.uk \
--to=davidmaxwaterman+gmane@fastmail.co.uk \
--cc=linux-raid@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.