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Date: Mon, 3 Dec 2001 21:04:42 +0100
From: Pavel Machek <pavel@suse.cz>
To: linux-kernel@vger.kernel.org
Subject: Re: Journaling pointless with today's hard disks?
Message-ID: <20011203210442.A248@elf.ucw.cz>
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Hi!

> > > Drives should never reassign blocks on read operations, because they'd
> > > take away the chance to try to read that block for say four hours.
> > 
> > Why not? If drive gets ECC-correctable read error, it seems to me like
> > good time to reassign.
> 
> Because you don't know if it's just some slipped bits, a shutdown during
> write, or an actual fault. When that happens on a verify after write,
> that's indeed reasonable. Otherwise the drive should just mark that
> block as "watch closely on next write".

Or better "write back and verify". You do not want even *ECC
correctable* errors to be on your platters.
								Pavel
-- 
"I do not steal MS software. It is not worth it."
                                -- Pavel Kankovsky
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