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Date:      Sat, 06 Dec 2014 16:13:18 +0900
From:      Stephane LAPIE <stephane.lapie@darkbsd.org>
To:        =?UTF-8?B?T2xpdmllciBDb2NoYXJkLUxhYmLDqQ==?= <olivier@cochard.me>,  Kai Gallasch <k@free.de>
Cc:        "freebsd-stable@freebsd.org Stable" <freebsd-stable@freebsd.org>
Subject:   Re: 10.1 RC4 r273903 - zpool scrub on ssd mirror - ahci command timeout
Message-ID:  <5482AC8E.4050408@darkbsd.org>
In-Reply-To: <CA%2Bq%2BTcrKBe0mwGHpjdvRRTUnAceQKvsjCsmQyLTnULcVP0dfpA@mail.gmail.com>
References:  <20141106003240.344dedf6@orwell> <CA%2Bq%2BTcrKBe0mwGHpjdvRRTUnAceQKvsjCsmQyLTnULcVP0dfpA@mail.gmail.com>

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On 11/24/2014 02:56 AM, Olivier Cochard-Labb=C3=A9 wrote:
> On Thu, Nov 6, 2014 at 12:32 AM, Kai Gallasch <k@free.de> wrote:
>
>> Hi.
>>
>> Not sure if this is 10.1 related or more a problem of the ssd
>> model and/or ahci controller..
>>
>>
>> I find the following kernel message in the output of 'dmesg': (after
>> running zpool scrub two times)
>>
>>
>> ahcich2: Timeout on slot 15 port 0
>> ahcich2: is 00000000 cs 000f0000 ss 000f8000 rs 000f8000 tfd 40 serr
>> 00000000 cmd 0024cf17 (ada2:ahcich2:0:0:0): READ_FPDMA_QUEUED. ACB: 60=

>> 8b a6 1d 56 40 0d 00 00 00 00 00 (ada2:ahcich2:0:0:0): CAM status:
>> Command timeout (ada2:ahcich2:0:0:0): Retrying command
>> ahcich2: Timeout on slot 23 port 0
>> ahcich2: is 00000000 cs 0f000000 ss 0f800000 rs 0f800000 tfd 40 serr
>> 00000000 cmd 0024d817 (ada2:ahcich2:0:0:0): READ_FPDMA_QUEUED. ACB: 60=

>> 1b 23 81 bc 40 06 00 00 00 00 00 (ada2:ahcich2:0:0:0): CAM status:
>> Command timeout (ada2:ahcich2:0:0:0): Retrying command
>> ahcich2: Timeout on slot 3 port 0
>> ahcich2: is 00000000 cs 00000030 ss 00000038 rs 00000038 tfd 40 serr
>> 00000000 cmd 0024c317 (ada2:ahcich2:0:0:0): READ_FPDMA_QUEUED. ACB: 60=

>> 26 bd 18 8e 40 12 00 00 00 00 00 (ada2:ahcich2:0:0:0): CAM status:
>> Command timeout (ada2:ahcich2:0:0:0): Retrying command
>>
>>
> Hi,
>
> I meet the same "CAM status: Command timeout" problem since my upgrade =
from
> 10.0 to 10.1 on a HP ProLiant MicroServer (AMD SB7x0/SB8x0/SB9x0 SATA
> Controller). A "zpool scrub" is a way for generating this error message=
 but
> writting big files (few GB) is another way too.
> _______________________________________________
> freebsd-stable@freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-stable
> To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.or=
g"
Hi,

I'm encountering something along those lines too,
with Transcend SSDs on AHCI controllers.
(Although the controllers are set and identified as ATA,
because of option ROM clash on that system,
which I should eventually get down to fixing...)

I have two ZFS pools :
- 15 disks on a LSI controller
- 2 SSDs on the aformentioned Intel AHCI controller

Ever since upgrading to 10.1-RELEASE,
eventually, I will get a warning in dmesg on either of the two SSDs :
ata0: already running!
ata1: already running!

Source code for ATA indicates that it is just reprocessing the same query=
,
and gstat indicates that operations are stuck in the I/O queue without
ever being purged.
Once it comes to that, the only way to (temporarily) recover is to reboot=
=2E

Cheers,

--=20
Stephane LAPIE, EPITA SRS, Promo 2005
"Even when they have digital readouts, I can't understand them."
--MegaTokyo



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