linux-kernel - Re: [ANNOUNCE] Ramback: faster than a speeding bullet

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Message-ID: <20080312133001.1668f40d@the-village.bc.nu>
Date:	Wed, 12 Mar 2008 13:30:01 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Benny Amorsen <benny+usenet@...rsen.dk>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [ANNOUNCE] Ramback: faster than a speeding bullet


> Everyone who has write cache turned on for their hard drives is
> running in a mode similar to ramback anyway (except for when the file
> system is set to force writes to the platter, but that is rare).
> Admittedly, software crashes rarely cause the write cache to be lost,
> but hardware failures do, practically every time.

On the contrary - the hard disk cache is managed by the barrier logic in
the kernel, and the ordering even on failures is fairly predictable.

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