In case you hadn't heard, OMEGAMON Storage V5.20 became available on September 14th. OMEGAMON Storage V5.20 adds a few goodies to the feature/function mix including:
New monitoring capabilities for VSAM Record Level Sharing (RLS)
Monitoring of CA1 Tape Library
Support for newer EMC storage hardware features
visibility into storage control unit metrics
Exploitation of zIIP processors to reduce cost of monitoring
If you are serious about monitoring and managing your DASD farm, OMEGAMON Storage has a lot of good information, and enables you to monitor and manage in a real time manner.
Here's a link for more information on OMEGAMON and other storage solutions: