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SubjectRe: [2.6.21.1] SATA freeze
Fred Moyer wrote:

>> Sounds like SMART is likely disabled on that drive. You can try doing
>> "smartctl -s on /dev/sda" and see if that will turn it on.
>>
>
> Sorry - that last post of mine was brain dead. Here's the one with
> (hopefully) useful data.
>
> app2 ~ # smartctl -d ata -a /dev/sda
> smartctl version 5.36 [x86_64-pc-linux-gnu] Copyright (C) 2002-6 Bruce Allen
>

(...)

> -- -- -- -- -- -- --
> 84 51 00 b5 c9 73 e0 Error: ICRC, ABRT at LBA = 0x0073c9b5 = 7588277
>
> Commands leading to the command that caused the error were:
> CR FR SC SN CL CH DH DC Powered_Up_Time Command/Feature_Name
> -- -- -- -- -- -- -- -- ---------------- --------------------
> 25 00 20 96 c9 73 e0 00 01:25:42.886 READ DMA EXT
> b0 d0 01 00 4f c2 00 02 01:25:42.868 SMART READ DATA
> 35 00 08 ae b6 42 e0 00 01:25:42.456 WRITE DMA EXT
> b0 da 00 00 4f c2 00 00 01:25:42.430 SMART RETURN STATUS
> 35 00 08 60 81 04 e0 00 01:25:42.376 WRITE DMA EXT

I was getting very similar SMART results, and kernel errors, when used
PATA drive and SATA_VIA (no freezes or hangs though):


SCSI device sda: 390721968 512-byte hdwr sectors (200050 MB)
sda: Write Protect is off
sda: Mode Sense: 00 3a 00 00
ata3.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
ata3.00: cmd b0/da:00:00:4f:c2/00:00:00:00:00/00 tag 0 cdb 0x0 data 0
res 51/04:00:0b:ff:bf/00:00:00:00:00/00 Emask 0x1 (device error)
ata3.00: configured for UDMA/100
ata3: EH complete
SCSI device sda: write cache: enabled, read cache: enabled, doesn't
support DPO or FUA
ata3.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
ata3.00: cmd b0/d0:01:00:4f:c2/00:00:00:00:00/00 tag 0 cdb 0x0 data 512 in
res 51/04:01:00:4f:c2/00:00:00:00:00/00 Emask 0x1 (device error)
ata3.00: configured for UDMA/100
ata3: EH complete



The problem was that I started smartd with wrong parameters:

DEVICESCAN -a -o on -S on -s (S/../.././10|L/../../6/11)

It was solved when I added "-d sat" to smartd parameters:

DEVICESCAN -d sat -a -o on -S on -s (S/../.././10|L/../../6/11)

From that time on, smartctl -a /dev/sda gives "normal" output, and no
more strange kernel errors.

Hopefully, it'll get fixed in smartmontools soon (or is fixed already,
but not yet mainline).


--
Tomasz Chmielewski
http://wpkg.org


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