From: Nat Makarevitch <Shelso@makarevitch.org>
To: linux-raid@vger.kernel.org
Subject: Determining which spindle is out of order
Date: Wed, 3 Nov 2010 14:13:25 +0000 (UTC) [thread overview]
Message-ID: <loom.20101103T115828-494@post.gmane.org> (raw)
Hi,
After a spindle (physical hard disk, a "drive") failure in a "md" RAID array,
how can we know which spindle must be replaced?
We want to avoid extracting a working spindle by mistakenly thinking it is the
faulty one...
To solve this problem we put on each spindle a physical label (a tag, not a
partition/disk label) showing its device name (sda, sdb...).
To do so: on an otherwise unused system and sane RAID array we ran "dd" for each
each spindle (individual device) in order to read on it, lighting up its LED.
Then we simulated a crash by physically removing two spindles. Upon reboot the
devices names changed (?!) and our labels weren't right anymore albeit we are
pretty sure they were.
Context: raid10, 10 spindles (8 active + 2 spare), layout : near=1, offset=3. On
the integrated controller + a LSI MPT on-board controller.
next reply other threads:[~2010-11-03 14:13 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-03 14:13 Nat Makarevitch [this message]
2010-11-03 14:38 ` Determining which spindle is out of order Roman Mamedov
2010-11-03 15:17 ` Graham Mitchell
2010-11-03 16:05 ` Roman Mamedov
2010-11-03 19:00 ` Jon Hardcastle
2010-11-03 14:43 ` John Robinson
2010-11-03 14:45 ` Tim Small
2010-11-03 15:59 ` Jon Hardcastle
2010-11-03 17:17 ` Bill Davidsen
2010-11-03 20:03 ` Tim Small
2010-11-03 15:29 ` Mikael Abrahamsson
2010-11-03 21:54 ` Phil Turmel
2010-11-03 22:26 ` Roman Mamedov
2010-11-04 9:29 ` Tom Carlson
2010-11-06 10:22 ` Leslie Rhorer
2010-11-06 15:12 ` Phil Turmel
[not found] ` <4CD57867.4010207@anonymous.org.uk>
2010-11-06 16:02 ` Phil Turmel
2010-11-06 16:11 ` Mathias Burén
2010-11-06 16:45 ` Jan Ceuleers
2010-11-06 19:39 ` Phil Turmel
2010-11-06 20:16 ` Leslie Rhorer
2010-11-06 20:23 ` Mr. James W. Laferriere
2010-11-07 7:51 ` Jan Ceuleers
2010-11-07 12:53 ` John Robinson
2010-11-07 13:21 ` Phil Turmel
2010-11-07 13:43 ` John Robinson
2010-11-07 14:43 ` Phil Turmel
2010-11-07 15:04 ` Mathias Burén
2010-11-07 15:19 ` John Robinson
2010-11-07 18:39 ` Phil Turmel
2010-11-07 20:46 ` Leslie Rhorer
2010-11-07 21:22 ` John Robinson
2010-11-08 18:59 ` John Robinson
2010-11-07 21:24 ` Andreas Dröscher
2010-11-08 21:05 ` Mr. James W. Laferriere
2010-11-07 20:52 ` Roman Mamedov
2010-11-09 14:40 ` Phil Turmel
2010-11-06 19:58 ` Leslie Rhorer
2010-11-06 21:17 ` John Robinson
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