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From: Bob Bishop <rb@gid.co.uk>
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Date: Mon, 24 Sep 2012 17:07:08 +0100
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To: Steven Hartland <killing@multiplay.co.uk>
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Cc: freebsd-fs@freebsd.org, freebsd-current@freebsd.org
Subject: Re: ZFS TRIM support committed to HEAD.
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Hi,

On 24 Sep 2012, at 16:55, Steven Hartland wrote:

> ----- Original Message ----- From: "Bob Bishop" <rb@gid.co.uk>
> To: "Pawel Jakub Dawidek" <pjd@freebsd.org>
> Cc: <freebsd-current@freebsd.org>; <freebsd-fs@freebsd.org>; "Steven =
Hartland" <killing@multiplay.co.uk>
> Sent: Monday, September 24, 2012 3:17 PM
> Subject: Re: ZFS TRIM support committed to HEAD.
>=20
>=20
>> Hi,
>> On 23 Sep 2012, at 23:25, Pawel Jakub Dawidek wrote:
>>> I have a patch against stable/8, but not stable/9:
>>> http://people.freebsd.org/~pjd/patches/zfstrim8.patch
>> Running with that in an otherwise 8-STABLE GENERIC amd64 kernel, I'm =
getting:
>> kstat.zfs.misc.zio_trim.zio_trim_bytes: 0
>> kstat.zfs.misc.zio_trim.zio_trim_success: 0
>> kstat.zfs.misc.zio_trim.zio_trim_unsupported: 0
>> kstat.zfs.misc.zio_trim.zio_trim_failed: 2742
>> which doesn't look like it's working. The SSDs are:
>> ad4: 114473MB <ADATA SSD S510 120GB 3.3.2> at ata2-master UDMA100 =
SATA 3Gb/s
>> ad6: 114473MB <ADATA SSD S510 120GB 3.3.2> at ata3-master UDMA100 =
SATA 3Gb/s
>> Any suggestions? Thanks
>=20
> Don't think ad supports TRIM, switch to ada (ahci) and you should be =
good.
>=20
> Although I'm surprised your seeing that many reported failures as it =
should
> have disabled it on a pool level after the first few failures.
>=20
> Is it still increasing?

Yes

I'll try switching to ahci

--
Bob Bishop
rb@gid.co.uk