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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).