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Date: Fri, 02 Feb 2007 17:58:04 -0500
From: Mark Lord <liml@....ca>
To: Matt Mackall <mpm@...enic.com>
Cc: Alan <alan@...rguk.ukuu.org.uk>, Ric Wheeler <ric@....com>,
James Bottomley <James.Bottomley@...senPartnership.com>,
linux-kernel@...r.kernel.org,
IDE/ATA development list <linux-ide@...r.kernel.org>,
linux-scsi <linux-scsi@...r.kernel.org>
Subject: Re: [PATCH] scsi_lib.c: continue after MEDIUM_ERROR
Matt Mackall wrote:
> ..
> Also worth considering is that spending minutes trying to reread
> damaged sectors is likely to accelerate your death spiral. More data
> may be recoverable if you give up quickly in a first pass, then go
> back and manually retry damaged bits with smaller I/Os.
All good input. But what was being debated here is not so much
the retrying of known-bad sectors, but rather what to do about
the kiBs or MiBs of sectors remaining in a merged request after
hitting a single bad sector mid-way.
Currently, SCSI just abandons the entire remaining workload.
Cheers
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