Re: [PATCH 1/2] libata: Expose trim capability in sysfs

[Marc MERLIN <marc@merlins.org>]

On Sun, Apr 06, 2014 at 03:05:51PM +1000, Chris Samuel wrote:
> On Sat, 5 Apr 2014 09:03:12 PM you wrote:
> 
> > Ok, I'm going to sound stupid, but which sysfs property is this in?
> > Or more simply what file do I have to cat see this?
> 
> I found them with a simple:
> 
> find /sys -name trim
> 
> I looked at my dmesg info from boot to correlate with devices.

Ah, that helps, thanks.

So here's another
Tested-By: Chris Samuel <marc@merlins.org>

legolas [mc]# cat /sys/devices/pci0000:00/0000:00:1f.2/ata1/link1/dev1.0/ata_device/dev1.0/trim
unqueued

:(

So much for the Samsung 840 EVO then.
Then again, it does confirm why deleting a kernel tree takes 1.5
seconds.

legolas [mc]# smartctl -i /dev/sda
smartctl 6.2 2013-07-26 r3841 [x86_64-linux-3.14.0-amd64-i915-preempt-20140216] (local build)
Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Device Model:     Samsung SSD 840 EVO 1TB
Serial Number:    S1D9NEAD934600N
LU WWN Device Id: 5 002538 85009a8ff
Firmware Version: EXT0BB0Q
User Capacity:    1,000,204,886,016 bytes [1.00 TB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    Solid State Device
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   ACS-2, ATA8-ACS T13/1699-D revision 4c
SATA Version is:  SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Sat Apr  5 23:18:08 2014 PDT
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

Thanks for the new code.

Marc
-- 
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Microsoft is to operating systems ....
                                      .... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/                         | PGP 1024R/763BE901