On Sat, Mar 15, 2014 at 11:26:27AM +, Duncan wrote:
Chris Samuel posted on Sat, 15 Mar 2014 17:48:56 +1100 as excerpted:
$ sudo smartctl --identify /dev/sdb | fgrep 'Trim bit in DATA SET
MANAGEMENT'
169 0 1 Trim bit in DATA SET MANAGEMENT command
supported
$
On Mar 16, 2014, at 12:06 AM, Marc MERLIN m...@merlins.org wrote:
Mmmh, so now I'm confused.
See this:
=== START OF INFORMATION SECTION ===
Device Model: INTEL SSDSC2BW180A3L
Serial Number:CVCV215200XU180EGN
LU WWN Device Id: 5 001517 bb28c5317
Firmware Version: LE1i
User
On Sun, Mar 16, 2014 at 12:22:05PM -0400, Martin K. Petersen wrote:
queued trim, not even a prototype. I went out and bought a 840 EVO this
morning because the general lazyweb opinion seemed to indicate that this
drive supports queued trim. Well, it doesn't. At least not in the 120GB
version:
On Sat, 15 Mar 2014 04:25:05 PM Chris Samuel wrote:
I wonder if it would be possible to use that knowledge to extend the
smartctl's --identify functionality to report this?
After reading the SATA 3.1 spec I believe that smartctl *can* indicate if a
drive claims to support SATA 3.1 NCQ TRIM,
On Thu, 13 Mar 2014 09:39:02 PM Chris Murphy wrote:
smartctl -a or -x will tell you what SATA revision is in place. The queued
trim support is in SATA Rev 3.1. I'm not certain if this requires only the
drive to support that revision level, or both controller and drive.
Both I'd say as I
Hi Marc,
On Thu, 13 Mar 2014 10:17:50 PM Marc MERLIN wrote:
I'm not sure I'm seeing this, which field is that?
I *think* you want smartctl -i instead, and look for the field that says
something like:
ATA Version is: ATA8-ACS, ACS-2 T13/2015-D revision 3
So if my understanding is correct
Marc MERLIN posted on Thu, 13 Mar 2014 22:17:50 -0700 as excerpted:
On Thu, Mar 13, 2014 at 09:39:02PM -0600, Chris Murphy wrote:
On Mar 13, 2014, at 8:11 PM, Marc MERLIN m...@merlins.org wrote:
On Sun, Mar 09, 2014 at 11:33:50AM +, Hugo Mills wrote:
discard is, except on the very
On Fri, Mar 14, 2014 at 12:07:54PM +, Duncan wrote:
Marc MERLIN posted on Thu, 13 Mar 2014 22:17:50 -0700 as excerpted:
On Thu, Mar 13, 2014 at 09:39:02PM -0600, Chris Murphy wrote:
On Mar 13, 2014, at 8:11 PM, Marc MERLIN m...@merlins.org wrote:
On Sun, Mar 09, 2014 at
Marc == Marc MERLIN m...@merlins.org writes:
Marc,
Marc So I have Sata 3.1, that's great news, it means I can keep using
Marc discard without worrying about performance and hangs
The fact that the drive reports compliance with a certain version of
SATA does not in any way imply that it
On Fri, 14 Mar 2014 15:57:41 -0400, Martin K. Petersen wrote:
So right now I'm afraid we don't have a good way for a user to determine
whether a device supports queued trims or not.
Mount with discard, unpack kernel tree, sync, rm -rf tree.
If it takes several seconds, you have sync discard,
On Mar 13, 2014, at 11:17 PM, Marc MERLIN m...@merlins.org wrote:
On Thu, Mar 13, 2014 at 09:39:02PM -0600, Chris Murphy wrote:
On Mar 13, 2014, at 8:11 PM, Marc MERLIN m...@merlins.org wrote:
On Sun, Mar 09, 2014 at 11:33:50AM +, Hugo Mills wrote:
discard is, except on the very
On Fri, 14 Mar 2014 06:33:24 PM Chris Samuel wrote:
I *think* you want smartctl -i instead, and look for the field that says
something like:
ATA Version is: ATA8-ACS, ACS-2 T13/2015-D revision 3
Late night, cut and pasted the wrong line of output, mine says:
SATA Version is: SATA 3.0,
On Fri, Mar 14, 2014 at 08:46:09PM +, Holger Hoffstätte wrote:
On Fri, 14 Mar 2014 15:57:41 -0400, Martin K. Petersen wrote:
So right now I'm afraid we don't have a good way for a user to determine
whether a device supports queued trims or not.
Mount with discard, unpack kernel tree,
On Mar 13, 2014, at 8:11 PM, Marc MERLIN m...@merlins.org wrote:
On Sun, Mar 09, 2014 at 11:33:50AM +, Hugo Mills wrote:
discard is, except on the very latest hardware, a synchronous command
(it's a limitation of the SATA standard), and therefore results in
very very poor performance.
On Thu, Mar 13, 2014 at 09:39:02PM -0600, Chris Murphy wrote:
On Mar 13, 2014, at 8:11 PM, Marc MERLIN m...@merlins.org wrote:
On Sun, Mar 09, 2014 at 11:33:50AM +, Hugo Mills wrote:
discard is, except on the very latest hardware, a synchronous command
(it's a limitation of the SATA
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