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 ____________________________________________________________ Penny Stock Jumping 2000% Sign up to the #1 voted penny stock newsletter for free today! http://thirdpartyoffers.netzero.net/TGL3231/4be042fc378a34813fst01vuc -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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 ____________________________________________________________ Penny Stock Jumping 2000% Sign up to the #1 voted penny stock newsletter for free today! http://thirdpartyoffers.netzero.net/TGL3231/4be0477ea76d4349041st01vuc -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html