On 11/29/12 04:40, Steven Hartland wrote:
Do you have any other disks in the machine if so its likely these are
the source of the unsupported increments.
No, not yet.
Best regards
Johannes
----- Original Message ----- From: "Johannes Dieterich"
<dieterich....@gmail.com>
To: <freebsd-current@freebsd.org>
Sent: Monday, November 26, 2012 7:48 PM
Subject: Samsung 830 and ZFS TRIM
Hello,
(initially posted this to -questions@ a week ago, w/o reply)
I installed CURRENT on a new Thinkpad equipped with a Samsung 830 SSD:
ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
ada0: <SAMSUNG SSD 830 Series CXM03B1Q> ATA-9 SATA 3.x device
ada0: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes)
ada0: Command Queueing enabled
ada0: 122104MB (250069680 512 byte sectors: 1H 63S/T 16383C)
ada0: Previously was known as ad4
as the setup is ZFS+GELI based (on ada0), I enabled ZFS TRIM support
in loader.conf.
Interestingly, I encounter an IMHO strange behavior with the stats on
that:
kstat.zfs.misc.zio_trim.zio_trim_bytes: 755712
kstat.zfs.misc.zio_trim.zio_trim_success: 97
kstat.zfs.misc.zio_trim.zio_trim_unsupported: 7891
kstat.zfs.misc.zio_trim.zio_trim_failed: 0
It seems unintuitive to me why the unsupported counter first increases
(seems to stay constant after that each boot) and then slowly the
success counter increases as well.
Probably there is a trivial explanation (GELI?) and/or fix for this
that anyone is willing to share?
If you need further information, let me know.
Thanks a lot
Johannes
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