Re: Slow disks.

From: David Rees
Date: Wed Dec 22 2010 - 18:13:36 EST


On Wed, Dec 22, 2010 at 2:46 PM, Rogier Wolff <R.E.Wolff@xxxxxxxxxxxx> wrote:
> On Wed, Dec 22, 2010 at 12:52:08PM -0800, David Rees wrote:
>> On Mon, Dec 20, 2010 at 6:15 AM, Rogier Wolff <R.E.Wolff@xxxxxxxxxxxx> wrote:
>> > A friend of mine has a server in a datacenter somewhere. His machine
>> > is not working properly: most of his disks take 10-100 times longer
>> > to process each IO request than normal.
>>
>> I've seen noticeable slowdowns before when the disks were running long
>> SMART tests.  It doesn't seem to affect all drives the same.  The
>> smartctl data you posted didn't say whether or not the disks were
>> currently running a SMART test, but it's worth double checking.
>
> No, the machine has trouble 24/7, I seriously doubt that it would be
> running smart tests 24/7.

It can not hurt to check the status of the disk to be sure...

-Dave
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