From: Paul Clements <paul.clements@steeleye.com>
To: Mirko Benz <mirko.benz@web.de>
Cc: linux-raid@vger.kernel.org
Subject: Re: NVRAM support
Date: Fri, 10 Feb 2006 12:38:38 -0500 [thread overview]
Message-ID: <43ECCF9E.5050102@steeleye.com> (raw)
In-Reply-To: <43EC5655.1060504@web.de>
Mirko Benz wrote:
> Does a high speed NVRAM device makes sense for Linux SW RAID? E.g. a PCI
> card that exports battery backed memory.
Sure. There are a couple ways I can think of using such a thing:
1) put an md intent bitmap on the NVRAM device for faster resyncs
2) use the NVRAM as a write journal for md to make md raid4/5/6 reliable
(if the system crashes while an md raid5 is degraded, i.e., missing a
disk, there is a chance of silent data corruption). The md driver does
not currently do write journalling, so this would require some code changes.
--
Paul
prev parent reply other threads:[~2006-02-10 17:38 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-10 9:01 NVRAM support Mirko Benz
2006-02-10 12:42 ` Erik Mouw
2006-02-10 15:43 ` Bill Davidsen
2006-02-11 1:02 ` dean gaudet
2006-02-13 9:22 ` Erik Mouw
2006-02-13 11:54 ` Andy Smith
2006-02-13 13:35 ` Guy
2006-02-14 10:17 ` Erik Mouw
2006-02-15 8:24 ` Mirko Benz
2006-02-15 23:00 ` Neil Brown
2006-02-16 10:05 ` Mario 'BitKoenig' Holbe
2006-02-20 9:57 ` Mirko Benz
2006-02-20 23:16 ` Neil Brown
2006-02-10 17:38 ` Paul Clements [this message]
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=43ECCF9E.5050102@steeleye.com \
--to=paul.clements@steeleye.com \
--cc=linux-raid@vger.kernel.org \
--cc=mirko.benz@web.de \
/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.