==> On Wed, 9 Nov 2005 16:38:47 -0500, "Prather, Wanda" <Wanda.Prather AT 
JHUAPL DOT EDU> said:

> I've talked with people from Tivoli and from Microsoft and from SHARE;
> there is NO instrumentation in Windows that will let you monitor what is
> going on over a non-disk I/O bus.  You hook tape to a Windows host, and
> it's a mystery what happens.   When I'm doing tape-to-tape operations, I
> can't tell WHERE the bottleneck is.  I don't have a really good notion
> of how much data you can push through a Windows box, given you have
> multiple HBA's/SCSI connections, but there is only 1 or 2 internal
> buses.  I can't tell how much memory is being used for the TAPE I/O
> buffers, or if that is an issue.


Wanda, could I elicit a short summary of how you like to monitor tape
bandwidth?  What tools do you like, &c?

- Allen S. Rout