From: Robert L Mathews <lists@tigertech.com>
To: linux-raid@vger.kernel.org
Subject: Re: Reassembling RAID1 after good drive was offline [newbie]
Date: Mon, 05 Jan 2015 09:25:55 -0800 [thread overview]
Message-ID: <54AAC923.1070501@tigertech.com> (raw)
In-Reply-To: <54A9B472.9090905@youngman.org.uk>
On 1/4/15 1:45 PM, Wols Lists wrote:
> It's only the other raids that have any error correction ability,
> because they use parity etc to be able to tell which set of data is correct.
In theory, yes, but in practice, they don't -- or do they? I thought
that even if you use RAID 6, md doesn't check all members on each read
request, calculate parities, and mask silent platter-level corruption by
ignoring a member spewing bad bits. It just uses parities to fill in
missing data if a member fails.
Or does it actually do error detection, and I'm confused?
--
Robert L Mathews, Tiger Technologies, http://www.tigertech.net/
next prev parent reply other threads:[~2015-01-05 17:25 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-01 17:40 Reassembling RAID1 after good drive was offline [newbie] Aryeh Leib Taurog
2015-01-01 20:54 ` Robert L Mathews
2015-01-02 11:01 ` Anthonys Lists
2015-01-02 14:02 ` Aryeh Leib Taurog
2015-01-02 13:01 ` Aryeh Leib Taurog
2015-01-02 18:38 ` Robert L Mathews
2015-01-04 10:20 ` Aryeh Leib Taurog
2015-01-04 11:10 ` Peter Grandi
2015-01-04 21:07 ` Aryeh Leib Taurog
2015-01-04 21:45 ` Wols Lists
2015-01-05 17:25 ` Robert L Mathews [this message]
2015-01-05 18:54 ` NeilBrown
2015-01-07 8:30 ` Aryeh Leib Taurog
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=54AAC923.1070501@tigertech.com \
--to=lists@tigertech.com \
--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.