StorageTek 6 manual Appendix D. Logging ACS Robotics Motion, Information Being Logged, Overview

Appendix D. Logging ACS Robotics Motion

Overview

StorageTek provides a way to monitor the reliability of ACS robotics motion. This appendix describes what information is logged and how that information is logged.

Information Being Logged

StorageTek logs robotic motion statistics in three categories:

•robotic Motion Start Counts

•temporary Motion Error Counts

•permanent Motion Errors.

Each category is described in the following paragraphs.

Note: Robotic motion start counts and temporary motion errors will only be recorded if OPTION LOGGING is set to EXTENDED.

Robotics Motion Start Counts

Each time an LSM robotics motion request is accepted by the LMU, the count of Robotics Motion Starts is incremented by one. This count represents the number of times the robot attempts to pick up a cartridge at one location, move it, and place it at another location.

When the Catalog or VIew commands are used, the count is the number of times the robot hand is moved to a target location. The Robotics Motion Start Count is incremented at the start of each robotics motion. The motion itself may be successful, have a temporary error or have a permanent failure.

With the exception of LMU busy retries, motions retried by the HSC are counted as additional subsequent motions, since each attempted motion request could result in a hardware failure (hard fail) or temporary error.

Temporary Motion Error Counts

For each motion which is successful, but which had a temporary error, the count of Temporary Motion Errors is incremented by one. A temporary error is counted against any motion that contains a retry at some level which either impacts performance or may indicate that hardware is degraded. Temporary errors are currently counted at the LSM level against any motion requiring a panel ID recalibration to complete. Temporary errors are counted at the LMU level if a motion must be retried.

Appendix D. Logging ACS Robotics Motion 603

1st ed., 6/30/04 - 312579601