From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Joe Thornber <joe@fib011235813.fsnet.co.uk>
Cc: linux-lvm@sistina.com, Andrew Theurer <habanero@us.ibm.com>,
Kevin Corry <corryk@us.ibm.com>,
linux-kernel@vger.kernel.org
Subject: Re: [linux-lvm] Re: [Announce] device-mapper beta3 (fast snapshots)
Date: 17 Jul 2002 12:46:14 +0100 [thread overview]
Message-ID: <1026906374.5709.136.camel@irongate.swansea.linux.org.uk> (raw)
In-Reply-To: <20020717103112.GA595@fib011235813.fsnet.co.uk>
On Wed, 2002-07-17 at 11:31, Joe Thornber wrote:
> On Tue, Jul 16, 2002 at 01:27:24PM -0400, Chris Mason wrote:
> > Some IDE drives ignore commands to turn off the write back cache, or
> > turn it back on when load gets high.
>
> I'm amazed hardware manufacturers would dare to do such a thing - I
> guess I'm naive.
Its not explicitly against the spec. Some of them also like to make
"cache flush" a no-op too. The next generation of ATA is supposed to add
explicit "direct to media" write command facilities
prev parent reply other threads:[~2002-07-17 10:32 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-12 23:21 Andrew Theurer
2002-07-15 8:59 ` Joe Thornber
2002-07-15 14:39 ` Andrew Theurer
2002-07-15 12:40 ` Joe Thornber
2002-07-15 18:56 ` [linux-lvm] " Kevin Corry
2002-07-16 8:42 ` Joe Thornber
2002-07-16 16:05 ` Andrew Theurer
2002-07-16 16:31 ` Joe Thornber
2002-07-16 17:27 ` Chris Mason
2002-07-17 10:31 ` [linux-lvm] " Joe Thornber
2002-07-17 11:46 ` Alan Cox [this message]
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