From: David Sterba <dsterba@suse.cz>
To: Brendan Hide <brendan@swiftspirit.co.za>
Cc: Gene Czarcinski <gene@czarc.net>,
linux-btrfs@vger.kernel.org, Josef Bacik <jbacik@fusionio.com>
Subject: Re: [PATCH 6/6] Btrfs-progs: detect if the disk we are formatting is a ssd
Date: Mon, 21 Jan 2013 14:01:22 +0100 [thread overview]
Message-ID: <20130121130122.GH19967@twin.jikos.cz> (raw)
In-Reply-To: <50FB0CA1.4070204@swiftspirit.co.za>
On Sat, Jan 19, 2013 at 11:14:09PM +0200, Brendan Hide wrote:
> On 2013/01/19 08:06 PM, Gene Czarcinski wrote:
> >Signed-off-by: Josef Bacik <jbacik@fusionio.com>
> >Signed-off-by: Gene Czarcinski <gene@czarc.net>
> >---
> >-values are raid0, raid1, raid10 or single.
> >+values are raid0, raid1, raid10, single or dup. Single device will have dup
> >+set by default except in the case of SSDs which will default to single. This is
> >+because SSDs can remap blocks internally so duplicate blocks could end up in the
> >+same erase block which negates the benefits of doing metadata duplication.
> Can't help but suggest that a "NO_DEDUP" command could be added to the SATA
> Transport Protocol/SCSI Command set. Not sure where to submit that idea ...
> :-/
You might get your answer from lkml, fsdevel or linux-scsi.
david
next prev parent reply other threads:[~2013-01-21 13:01 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-19 18:06 [PATCH 0/6] patches from Fedora 18 (resubmitted) Gene Czarcinski
2013-01-19 18:06 ` [PATCH 1/6] Fedora 18 - btrfs-init-dev-list.patch Gene Czarcinski
2013-01-22 21:56 ` Gene Czarcinski
2013-01-19 18:06 ` [PATCH 2/6] Fedora 18 - build-fixes.patch Gene Czarcinski
2013-01-22 21:25 ` Gene Czarcinski
2013-01-23 18:12 ` David Sterba
2013-01-19 18:06 ` [PATCH 3/6] Fedora 18 - fix-labels.patch Gene Czarcinski
2013-01-22 21:45 ` Gene Czarcinski
2013-01-19 18:06 ` [PATCH 4/6] Fedora 18 - modified valgrind.patch Gene Czarcinski
2013-01-22 21:53 ` Gene Czarcinski
2013-01-23 19:40 ` Eric Sandeen
2013-01-19 18:06 ` [PATCH 5/6] Btrfs-progs: add btrfs device ready command Gene Czarcinski
2013-01-19 18:06 ` [PATCH 6/6] Btrfs-progs: detect if the disk we are formatting is a ssd Gene Czarcinski
2013-01-19 21:14 ` Brendan Hide
2013-01-21 13:01 ` David Sterba [this message]
2013-01-23 2:35 ` Chris Samuel
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