From: Erik Mouw <erik@harddisk-recovery.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Rogier Wolff <R.E.Wolff@harddisk-recovery.nl>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-ide@vger.kernel.org
Subject: Re: Driver retries disk errors.
Date: Tue, 31 Aug 2004 17:56:53 +0200 [thread overview]
Message-ID: <20040831155653.GD17261@harddisk-recovery.com> (raw)
In-Reply-To: <1093961570.597.2.camel@localhost.localdomain>
On Tue, Aug 31, 2004 at 03:12:52PM +0100, Alan Cox wrote:
> On Maw, 2004-08-31 at 14:54, Rogier Wolff wrote:
> > How about we set the num-retries to 1, and increase to 8 for
> > "weird devices" (floppy, MO), and older drives.
>
> Disagree. I want it robust. If you want to set low retry counts then
> the user should do so for special cases like forensics.
The SCSI disk driver has been doing a single retry for quite some time
and it hasn't really bitten people. Why would the IDE disk driver be
different? The only case I can imagine a retry would be OK, is when we
get an UDMA CRC error (caused by bad cables).
(OK, for SCSI drives you have a lot more control about how a drive
should treat errors, but the kernel will not retry a block when the
drive reported it's bad.)
Erik
--
+-- Erik Mouw -- www.harddisk-recovery.com -- +31 70 370 12 90 --
| Lab address: Delftechpark 26, 2628 XH, Delft, The Netherlands
next prev parent reply other threads:[~2004-08-31 15:56 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-30 16:39 Driver retries disk errors Rogier Wolff
2004-08-30 17:46 ` Theodore Ts'o
2004-08-30 18:26 ` James Courtier-Dutton
2004-08-30 22:25 ` Rogier Wolff
2004-08-31 11:38 ` Alan Cox
2004-09-02 16:23 ` Eric Mudama
2004-08-31 15:16 ` Bill Davidsen
2004-08-30 22:17 ` Rogier Wolff
2004-08-31 11:45 ` Alan Cox
2004-08-31 13:45 ` Andre Hedrick
2004-08-31 13:54 ` Rogier Wolff
2004-08-31 14:12 ` Alan Cox
2004-08-31 15:56 ` Erik Mouw [this message]
2004-08-31 15:13 ` Alan Cox
2004-08-31 17:00 ` Erik Mouw
2004-08-31 16:12 ` Alan Cox
2004-09-01 15:18 ` Bill Davidsen
2004-09-01 14:46 ` Alan Cox
2004-09-01 18:54 ` Bill Davidsen
2004-09-01 15:28 ` Romano Giannetti
2004-09-01 14:44 ` Alan Cox
2004-09-01 23:14 ` Rogier Wolff
2004-09-02 9:29 ` Alan Cox
2004-09-02 10:54 ` Rogier Wolff
2004-09-02 14:30 ` John Stoffel
2004-09-02 14:59 ` Alan Cox
2004-09-02 16:07 ` John Stoffel
2004-09-02 16:26 ` Eric Mudama
2004-08-31 22:55 ` Christer Weinigel
[not found] <fa.d48te6f.1ol6tbb@ifi.uio.no>
[not found] ` <fa.eti1vu1.2nqlj5@ifi.uio.no>
2004-08-31 0:17 ` Robert Hancock
2004-09-01 23:04 ` Rogier Wolff
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