From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Cc: "'Oliver S.'" <Follow.Me@gmx.net>
Subject: RE: questions regarding Journalling-FSes and w-cache reordering
Date: 09 Apr 2003 21:12:16 +0100 [thread overview]
Message-ID: <1049919134.10871.5.camel@dhcp22.swansea.linux.org.uk> (raw)
In-Reply-To: <785F348679A4D5119A0C009027DE33C102E0D0B1@mcoexc04.mlm.maxtor.com>
On Mer, 2003-04-09 at 20:52, Mudama, Eric wrote:
> ATA hard drives are allowed to reorder/merge/etc their write caches if write
> cache is enabled. With write caching enabled, there is no guarantee that
> dirty data will be flushed in any specific order, nor does the ATA protocol
> support any such ordering beyond the global flush cache command.
To cheer people up further by the way, not all ATA drives support cache
flush, some drives dont support write cache disable and others implement
write/verify as write.
So basically you can't do it.
next prev parent reply other threads:[~2003-04-09 20:58 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-04-09 19:52 Mudama, Eric
2003-04-09 20:12 ` Alan Cox [this message]
2003-04-09 21:35 ` Torrey Hoffman
2003-04-10 17:39 ` Alan Cox
-- strict thread matches above, loose matches on Subject: below --
2003-04-09 19:33 Oliver S.
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