# Re: AWFUL reshape speed with raid5.

- From: Bill Davidsen \<hidden\>
- Date: 2008-07-30 17:24:25 
- List: linux-raid
- Page: https://ratatoskr.run/linux-raid/2008/07/6603596
- Thread: https://ratatoskr.run/linux-raid/2008/07/6603571/t.md

```text
David Greaves wrote:
> Bill Davidsen wrote:
>   
>> vmstat doesn't tell you enough, you need a tool to show per-device and
>> per-partition io, which will give you what you need. I can't put a
>> finger on the one I wrote, but there are others.
>>     
>
> iostat?
>   

dstat seems to do what he wants, the one I wrote produced a file which could be used by gnuplot to generate neat graphical output to make problems glaringly obvious.

-- 
Bill Davidsen [ref]
 "Woe unto the statesman who makes war without a reason that will still
 be valid when the war is over..." Otto von Bismark


```