>> On Mon, 10 Nov 2008 13:22:32 -0800, "Clark, Robert A" <Robert.Clark AT 
>> providence DOT org> said:

> What is the source and destination for the data? Is it coming from
> disk or tape? Is it going to disk or tape?

All, or vast majority, tape-to-tape.

> Idle percentage doesn't tell much, especially if the systems are doing a
> lot of I/O wait.

Very little IO wait.  Not all the time, of course.  But the slow
traffic persists across multiple minute periods of maybe 5% IOwait.




- Allen S. Rout