User logging automatically recovers from power failures occurring on
the I/O device where the logfile resides. If User Logging detects
that a power failure has occurred, it will automatically read
the logfile until the last good record is read. It will then rewrite
the data, from its buffer, starting at that block.
The Operator
may be prompted to reset the tape drive and place it back online.
If the power failure occurs at the beginning of the current tape,
the Operator will be requested to mount the previous tape and
then remount the current tape. The system console will display
messages that the User Logging Power Failure Recovery has completed.
