From: NeilBrown <neilb@suse.de>
To: David Brown <david.brown@hesbynett.no>
Cc: linux-raid@vger.kernel.org
Subject: Re: md road-map: 2011
Date: Thu, 17 Feb 2011 11:55:12 +1100 [thread overview]
Message-ID: <20110217115512.010eefc0@notabene.brown> (raw)
In-Reply-To: <ijhq7p$pjv$1@dough.gmane.org>
On Thu, 17 Feb 2011 01:30:49 +0100 David Brown <david.brown@hesbynett.no>
wrote:
> Do filesystems re-try reads when there is a failure? Could you return
> fail on one read, then success on a re-read, which could be interpreted
> as "dying, but not yet dead" by the file system?
>
Not normally. The underlying device is assumed to perform all retrys that
are reasonable. Retrying again at the FS level would be pointless.
It certainly would be possibly to return some sort of "data not very safe"
indicator, which a disk drive could set if it needed to retry the read.
However you need to get buy-in from some FS developer before it is worth the
effort.
NeilBrown
next prev parent reply other threads:[~2011-02-17 0:55 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-16 10:27 md road-map: 2011 NeilBrown
2011-02-16 11:28 ` Giovanni Tessore
2011-02-16 13:40 ` Roberto Spadim
2011-02-16 14:00 ` Robin Hill
2011-02-16 14:09 ` Roberto Spadim
2011-02-16 14:21 ` Roberto Spadim
2011-02-16 21:55 ` NeilBrown
2011-02-17 1:30 ` Roberto Spadim
2011-02-16 14:13 ` Joe Landman
2011-02-16 21:24 ` NeilBrown
2011-02-16 21:44 ` Roman Mamedov
2011-02-16 21:59 ` NeilBrown
2011-02-17 0:48 ` Phil Turmel
2011-02-16 22:12 ` Joe Landman
2011-02-16 15:42 ` David Brown
2011-02-16 21:35 ` NeilBrown
2011-02-16 22:34 ` David Brown
2011-02-16 23:01 ` NeilBrown
2011-02-17 0:30 ` David Brown
2011-02-17 0:55 ` NeilBrown [this message]
2011-02-17 1:04 ` Keld Jørn Simonsen
2011-02-17 10:45 ` David Brown
2011-02-17 10:58 ` Keld Jørn Simonsen
2011-02-17 11:45 ` Giovanni Tessore
2011-02-17 15:44 ` Keld Jørn Simonsen
2011-02-17 16:22 ` Roberto Spadim
2011-02-18 0:13 ` Giovanni Tessore
2011-02-18 2:56 ` Keld Jørn Simonsen
2011-02-18 4:27 ` Roberto Spadim
2011-02-18 9:47 ` Giovanni Tessore
2011-02-18 18:43 ` Keld Jørn Simonsen
2011-02-18 19:00 ` Roberto Spadim
2011-02-18 19:18 ` Keld Jørn Simonsen
2011-02-18 19:22 ` Roberto Spadim
2011-02-16 17:20 ` Joe Landman
2011-02-16 21:36 ` NeilBrown
2011-02-16 19:37 ` Phil Turmel
2011-02-16 21:44 ` NeilBrown
2011-02-17 0:11 ` Phil Turmel
2011-02-16 20:29 ` Piergiorgio Sartor
2011-02-16 21:48 ` NeilBrown
2011-02-16 22:53 ` Piergiorgio Sartor
2011-02-17 0:24 ` Phil Turmel
2011-02-17 0:52 ` NeilBrown
2011-02-17 1:14 ` Phil Turmel
2011-02-17 3:10 ` NeilBrown
2011-02-17 18:46 ` Phil Turmel
2011-02-17 21:04 ` Mr. James W. Laferriere
2011-02-18 1:48 ` NeilBrown
2011-02-17 19:56 ` Piergiorgio Sartor
2011-02-16 22:50 ` Keld Jørn Simonsen
2011-02-23 5:06 ` Daniel Reurich
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