Re: kernel errors and unknown SMART properties

Y. wrote:
> Hi!
> My issue is a bit complex. Please bear with me.
> I wrote a lenghty article on the subject a year ago:
> http://yalis.fr/cms/index.php/post/2013/12/14/“If-it-ain’t-broken,-don’t-fix-it”…-or-should-you

This article contains sample output from 3+ years old smartctl 5.41. The 
output suggests that garbage data is returned in the SMART data block.

Please update smartmontools if possible.


> At the time, I decided to just let things be, since I had no clue to a
> solution.
> Today, I decided to try some new tests. I ran smartctl with -d marvell,
> ata, scsi, sat, sat,12, sat,16, with -i, -a, -x, diff'ed the results…
> all the time while running tail -f /var/log/syslog | grep kernel.
>
> First, I could see that probably ALL of my kernel errors stem from Smart
> actions.
>
> But all these tests produced loads of Unknown_Attribute. _Until I ran_:
> diff <(smartctl -d sat,12 -x /dev/sda) <(smartctl -d sat,16 -x /dev/sda)
>
> And there, for the first time in a very long time, I could see:
>>    1 Raw_Read_Error_Rate     POSR-K   200   200   ---    -    0
>> ...
>> 198 Offline_Uncorrectable   ----CK   200   200   ---    -    0
>> 199 UDMA_CRC_Error_Count    -O--CK   200   001   ---    -    819
> So I thought: Oh!, so sat,16 is the right value, and I forgot to specify
> ",16" before! Well, except that this is the default value, and sure
> enough, a subsequent run of smartctl -d sat,16 -x /dev/sda just gave me
> Unknown_Attribute. Bummer.

'-d sat' and '-d sat,16' should not make any difference.

Please provide sample output of:

   smartctl -r ioctl,2 -i -A -d sat,12 /dev/sdX
   smartctl -r ioctl,2 -i -A -d sat,16 /dev/sdX

as attachments(!). Add '-q noserial' option if desired. Never discard 
the first output line as it tells us smartmontools version and platform.

Thanks,
Christian


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