Questionable Status
Robin Laing
Robin.Laing at drdc-rddc.gc.ca
Fri Oct 2 17:12:30 UTC 2009
Tony Nelson wrote:
> On 09-10-01 09:09:40, Robin Laing wrote:
>> Tony Nelson wrote:
>>> On 09-09-23 09:29:56, Gene Poole wrote:
>>>> I've very recently upgraded 2 of my machines. One machine was
>>>
>> Will the `smartctl -o on /dev/sdx` (for > each sdx), fix the nonzero
>> Reallocated_Event_Count issue on RAID arrays in a non-desctructive
>> way?
>
> No. Nor for non-RAID either. It doesn't "fix" Reallocated_Event_Count
> -- rather, its purpose is to make Reallocated_Event_Count go up faster,
> in that as soon as a sector starts to go bad it will be reallocated if
> readable, and the sooner the more likely it is possible. A non-zero
> Reallocated_Event_Count is not a problem. Whatever says it is a
> problem is the real problem. Fix that instead.
>
> Non-zero Current_Pending_Sector is a problem, but RAID should be fixing
> that already. I don't know, but I think that enabling Automatic
> Offline Testing should cause any uncorrectable sectors to be noticed
> and fixed sooner by RAID.
>
>> Do you have to use the /dev/sdx devices or the /dev/md devices?
> ...
>
> Automatic Offline Testing must be enabled on an actual ATA hard disk,
> so no fake disk such as dm or md. See `man smartctl`.
>
With the changes, I was shocked to see the error message when I tried a
live DVD on my laptop. It would be worthwhile to have a tool for
testing and possibly fixing the problem in a non-destructive way for
most users. I guess it is time for an RFE search.
--
Robin Laing
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