Re: long hangs when deleting large directories (3.0-rc3)

Markus Trippelsdorf
2011-06-20T12:31:35Z

On 2011.06.20 at 13:45 +0200, Michael Monnerie wrote:
> On Montag, 20. Juni 2011 Markus Trippelsdorf wrote:
> > Here are two more examples. The time when the hang occurs is marked
>
> Could it be that some sectors on the disk are not easy to read for the
> drive, and that it simply retries several times until it works again?
> SATA disks can show that behaviour. You could try with "dd" with
> seek/skip parameters so you read 1gb at once, then skip 1gb and read 1gb
> again etc, and compare the throughput over all 1gb areas. If there's one
> slower, that might be the problem.
>
> Maybe a check with "smartctl" could help, too.

Thanks for the hint, Michael. I've just checked the SMART status on
both disks and the 4kb drive looks indeed suspicious:

197 Current_Pending_Sector 0x0012 100 100 000 Old_age Always - 8
198 Offline_Uncorrectable 0x0010 100 100 000 Old_age Offline - 8

The 512 byte drive appears to be fine. But I'm running the long
SMART self test on both of them right now and will report back
the result in a few hours.