From: "Bryn M. Reeves" <breeves@redhat.com>
To: LVM general discussion and development <linux-lvm@redhat.com>
Subject: Re: [linux-lvm] LVM on SATA/PATA disks
Date: Mon, 14 May 2007 09:30:42 +0100 [thread overview]
Message-ID: <46481E32.4060808@redhat.com> (raw)
In-Reply-To: <464672A6.3000408@davidb.org>
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David Brown wrote:
> Of course, any of the re-ordering (SCSI TCQ, or SATA NCQ) requires
> filesystem and driver support of write barriers for reliability.
> Write barriers are not implement in DM, hence LVM, so there is a
Only the dm-mpath and dm-snap targets treat barrier bios specially (they
return EOPNOTSUPP). Other dm targets pass the barriers on to the
underlying devices unchanged.
Regards,
Bryn.
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next prev parent reply other threads:[~2007-05-14 8:36 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-12 21:42 [linux-lvm] LVM on SATA/PATA disks Bertrand Renuart
2007-05-13 1:12 ` Stuart D. Gathman
2007-05-13 1:23 ` Brian J. Murrell
2007-05-13 1:34 ` Stuart D. Gathman
2007-05-13 2:06 ` David Brown
2007-05-13 16:46 ` Les Mikesell
2007-05-13 17:24 ` Stuart D. Gathman
2007-05-14 8:38 ` Bryn M. Reeves
2007-05-14 8:30 ` Bryn M. Reeves [this message]
2007-05-14 15:24 ` David Brown
2007-05-15 14:35 ` Bryn M. Reeves
2007-05-13 20:25 ` Bertrand Renuart
2007-05-14 14:53 ` Stuart D. Gathman
2007-05-14 14:59 ` Daniel Davidson
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