[CentOS] Software RAID1 Disk I/O

Matt lm7812 at gmail.com
Wed Jan 6 01:24:06 UTC 2010

> That's working normally with the sync completed.  Mirrors should run at
> close to the speed of a single drive.  Maybe you are just expecting too
> much from SATA or you have something like an updatedb running.  An
> 'hdparm -tT' against the partitions and md devices should give you an
> idea of what the drives can do.  And top might show what's causing the
> load (but maybe not if it is mostly waiting on disk seeks).

There should currently be virtually NO disk I/O on this box right now.
 Its a bare install and I have not installed any apps yet.  Is there
an easy way to tell whats using all the I/O?  The drive activity light
never goes off.  I did a torch in my firewall router and there is no
network activity going to it.


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