Long I/O pauses on same mass storage

[Adam Vande More]

On Wed, May 12, 2010 at 8:46 AM, A. Wright <andrew at qemg.org> wrote:

>
> I have recently upgraded my system to 8.0, and in the
> course of doing so, have migrated most filesystems
> onto a new drive.
>

Did you dd it across?  If so, that's kind of a no-no in some situtation as
the boundries won't be aligned resulting in slow disk.  You should use a
different tool like dump/restore.


>
> This seems to most commonly happen when both reading
> and writing tasks are active -- I am unsure whether reads writes must be in
> the same partition, or whether
> two partitions on the same drive are sufficient.
>

If this is one of them "eco" drives, you may wish to investigate things like
firmware updates etc.

You can also try using achi, it has quite a benefits including speed.  Make
sure to read up on it first.

-- 
Adam Vande More