Re: 2.6.24.3: regular sata drive resets - worrisome?

[Tejun Heo <htejun@gmail.com>]

Hello, Hans.

Andrew Morton wrote:
>> since I upgraded to 2.6.24.3 on one of my production systems, I see 
>> regular device resets like these:
>>
>> Mar 20 14:33:03 lisa5 kernel: ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
>> Mar 20 14:33:03 lisa5 kernel: ata2.00: cmd ea/00:00:00:00:00/00:00:00:00:00/a0 tag 0
>> Mar 20 14:33:03 lisa5 kernel:          res 40/00:00:01:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)

Ouch, timeout on FLUSH_EXT.  Are all errors on cmd ea?

>> Should I be worried? smartd doesn't show anything suspicious on those.

Can you please post the result of "smartctl -a /dev/sdX"?

>> It's been 4 samsung drives at all hanging on a sata sil 3124:

FLUSH_EXT timing out usually indicates that the drive is having problem 
writing out what it has in its cache to the media.  There was one case 
where FLUSH_EXT timeout was caused by the driver failing to switch 
controller back from NCQ mode before issuing FLUSH_EXT but that was on 
sata_nv.  There hasn't been any similar problem on sata_sil24.

Thanks.

-- 
tejun