Samsung SSD TRIM [Was: Heads up]

[Andriy Gapon]

On 15/04/2016 07:19, Warner Losh wrote:
> Samsung 830 all firmware
> Samsung 840 all firmware
> Samsung 850 all firmware
> 
> All of these are at least 18 months old (if not older). There's some
> confusing in Linux lists on
> the full impact of the Samsung drives (there was a bug in the Linux
> implementation (that can't
> be present in the FreeBSD implementation) that may have been the root cause
> for the Samsung
> black listing). Out of an abundance of caution, I've kept them in the list.

For what it's worth, I have been using the following SSDs since September of 2015 :

ada2: <Samsung SSD 850 EVO 120GB EMT01B6Q> ACS-2 ATA SATA 3.x device
ada3: <Samsung SSD 850 EVO 120GB EMT01B6Q> ACS-2 ATA SATA 3.x device

with ZFS with TRIM enabled and I haven't seen any problems thus far:

$ sysctl kstat | fgrep trim
kstat.zfs.misc.zio_trim.failed: 0
kstat.zfs.misc.zio_trim.unsupported: 2268
kstat.zfs.misc.zio_trim.success: 36895209
kstat.zfs.misc.zio_trim.bytes: 976003989504

Those disks are partitioned and host a small ZFS root / system pool plus log and
cache vdevs for other HDD-based pool.
So, I think that if the SSDs had any problem with TRIM I would have noticed it
by now.

-- 
Andriy Gapon