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Chapter 6. Performance Considerations 413
1st ed., 6/30/04 - 312579601
This utility provides the library administrator with the information necessary to balance
mount/dismount activity across ACSs and LSMs within a library. The information is
based on statistics contained in SMF records that are tallied for each cartridge movement.
Total Mount and Dismount activity is categorized to show a percentage for:
• scratch mount/total mounts and average time per mount
• nonscratch mounts/total mounts, and average time per mount
• scratch mounts in a different LSM/total mounts, average time per mount, and
average number of pass-thrus
• nonscratch mounts in a different LSM/total mounts, average time per mount, and
average number of cartridge exchanges.
Refer to Chapter 4, “Utility Functions” on page 169 for detailed information on the
Activities Report utility.
Using the Performance Measurement and Predictive Maintenance System (PM2)
The Performance Measurement and Predictive Maintenance System generates
performance and error reports on various StorageTek equipment, including the library.
There are two categories of reports that provide information about library operation:
• ACS Daily Report
• Tape Volume Report.
ACS Daily Report
The ACS Daily Report contains the following information:
• Library Subsystem Error Report
• LMU Response Summary
• Problem Volume Serial List
• ACS Deblocking Error Report
• ACS Door Open Summary
• ACS LMU Degraded Summary
• ACS Database Journaling Entry
• ACS Primary/Shadow Switch Record
• ACS Audit Required Summary
• ACS Host Recovery Summary.
Tape Volume Report
The Tape Volume Report contains the following information:
• Tape Volume Select
• Tape Volume Analysis.
Refer to the PM2 Report Description & Analysis Manual - Install User’s Manual for
detailed information about PM2 and the reports that can be helpful to you in monitoring
library performance.