From: Janek Kozicki <janek_listy@wp.pl>
To: linux-raid@vger.kernel.org
Subject: doesm mdadm try to use fastest HDD ?
Date: Fri, 2 Nov 2007 12:52:05 +0100 [thread overview]
Message-ID: <20071102125205.52c2d115@absurd> (raw)
Hello,
My three HHDs have following speeds:
hda - speed 70 MB/sec
hdc - speed 27 MB/sec
sda - speed 60 MB/sec
They create a raid1 /dev/md0 and raid5 /dev/md1 arrays. I wanted to
ask if mdadm is trying to pick the fastest HDD during operation?
Maybe I can "tell" which HDD is preferred?
This came to my mind when I saw this:
# mdadm --query --detail /dev/md1 | grep Prefer
Preferred Minor : 1
And also in the manual:
-W, --write-mostly [...] "can be useful if mirroring over a slow link."
many thanks for all your help!
--
Janek Kozicki |
next reply other threads:[~2007-11-02 11:52 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-02 11:52 Janek Kozicki [this message]
2007-11-02 13:10 ` doesm mdadm try to use fastest HDD ? Bill Davidsen
2007-11-07 9:10 ` Goswin von Brederlow
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=20071102125205.52c2d115@absurd \
--to=janek_listy@wp.pl \
--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.