* Re: TRIM + RAID Support?
@ 2010-05-04 16:12 Justin
2010-05-05 13:22 ` David Woodhouse
0 siblings, 1 reply; 4+ messages in thread
From: Justin @ 2010-05-04 16:12 UTC (permalink / raw)
To: josef; +Cc: linux-btrfs
Awesome.
Has there been a lot of testing with RAID + TRIM setups?
---------- Original Message ----------
From: Josef Bacik <josef@redhat.com>
To: Justin <yoosty69@netzero.com>
Cc: linux-btrfs@vger.kernel.org
Subject: Re: TRIM + RAID Support?
Date: Tue, 4 May 2010 11:58:35 -0400
On Tue, May 04, 2010 at 03:53:17PM +0000, Justin wrote:
> As I understand it, hardware RAID controllers do not pass the TRIM command to it's disks; btrfs deals with the disk directly, supports TRIM, and supports RAID. I have seen no explicit mention of being able to combine RAID and TRIM support using btrfs with independent disks so I'm asking: When btrfs is in RAID mode, does it still pass the TRIM commands to the SSD?
>
If TRIM is enabled then yes it should. Thanks,
Josef
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: TRIM + RAID Support?
2010-05-04 16:12 TRIM + RAID Support? Justin
@ 2010-05-05 13:22 ` David Woodhouse
0 siblings, 0 replies; 4+ messages in thread
From: David Woodhouse @ 2010-05-05 13:22 UTC (permalink / raw)
To: Justin; +Cc: josef, linux-btrfs
On Tue, 2010-05-04 at 16:12 +0000, Justin wrote:
> Awesome.
Which is more than we can say for your use of email. Please don't
top-post, and please don't use broken mail clients which omit the
correct References: and In-Reply-To: threading headers from replies,
thus disassociating your response from the thread it was supposed to be
part of.
> Has there been a lot of testing with RAID + TRIM setups?
Not so much that anyone else has shown any interest in these patches, or
even independently noticed and reported the bugs they fix:
http://git.infradead.org/users/dwmw2/btrfs-raid56.git/commitdiff/3885963f
http://git.infradead.org/users/dwmw2/btrfs-raid56.git/commitdiff/3de9680a
--
David Woodhouse Open Source Technology Centre
David.Woodhouse@intel.com Intel Corporation
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: TRIM + RAID Support?
2010-05-04 15:53 Justin
@ 2010-05-04 15:58 ` Josef Bacik
0 siblings, 0 replies; 4+ messages in thread
From: Josef Bacik @ 2010-05-04 15:58 UTC (permalink / raw)
To: Justin; +Cc: linux-btrfs
On Tue, May 04, 2010 at 03:53:17PM +0000, Justin wrote:
> As I understand it, hardware RAID controllers do not pass the TRIM command to it's disks; btrfs deals with the disk directly, supports TRIM, and supports RAID. I have seen no explicit mention of being able to combine RAID and TRIM support using btrfs with independent disks so I'm asking: When btrfs is in RAID mode, does it still pass the TRIM commands to the SSD?
>
If TRIM is enabled then yes it should. Thanks,
Josef
^ permalink raw reply [flat|nested] 4+ messages in thread
* TRIM + RAID Support?
@ 2010-05-04 15:53 Justin
2010-05-04 15:58 ` Josef Bacik
0 siblings, 1 reply; 4+ messages in thread
From: Justin @ 2010-05-04 15:53 UTC (permalink / raw)
To: linux-btrfs
As I understand it, hardware RAID controllers do not pass the TRIM command to it's disks; btrfs deals with the disk directly, supports TRIM, and supports RAID. I have seen no explicit mention of being able to combine RAID and TRIM support using btrfs with independent disks so I'm asking: When btrfs is in RAID mode, does it still pass the TRIM commands to the SSD?
Justin
____________________________________________________________
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^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2010-05-05 13:22 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2010-05-04 16:12 TRIM + RAID Support? Justin
2010-05-05 13:22 ` David Woodhouse
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2010-05-04 15:53 Justin
2010-05-04 15:58 ` Josef Bacik
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