From: Asdo <asdo@shiftmail.org>
To: rj <ratnadeep@gmail.com>
Cc: linux-raid@vger.kernel.org
Subject: Re: Does MD solve write hole issue for RAID5/RAID6?
Date: Wed, 03 Mar 2010 14:40:53 +0100 [thread overview]
Message-ID: <4B8E66E5.9050606@shiftmail.org> (raw)
In-Reply-To: <d19eda751003030417o3a7ec761ua54e93875002410a@mail.gmail.com>
rj wrote:
> Hi,
> I wanted to know if md solves write hole issue for RAID5/RAID6?
>
No but the filesystem can do that, ext3/4 and XFS in particular, if well
aligned on the RAID, if you are creating new files and not updating old
files (i.e. doesn't work for databases).
For full write hole avoidance you need to wait for Btrfs (and I don't
know the state of raid-5/6 on btrfs), or use ZFS on Solaris or Freebsd.
> Also, does md support RAID 50 level ?
>
Not directly, but you can create that manually by overlaying a raid 0
over 1+ raid5's.
next prev parent reply other threads:[~2010-03-03 13:40 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-03 12:17 Does MD solve write hole issue for RAID5/RAID6? rj
2010-03-03 13:40 ` Asdo [this message]
2010-03-05 19:32 ` Goswin von Brederlow
2010-03-09 3:14 ` rj
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=4B8E66E5.9050606@shiftmail.org \
--to=asdo@shiftmail.org \
--cc=linux-raid@vger.kernel.org \
--cc=ratnadeep@gmail.com \
/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.