RXXFIX (Recover End-Of-File) › RXXFIX › RESTART Processing of a Tape Without End-of-File

RESTART Processing of a Tape Without End-of-File

If the tape has no End-of-File or trailer records, the RESTART process detects the condition and reports the incomplete cycle number. The RESTART process then changes the cycle and the log blocks being spilled from the status of "being spilled" to a status of "needing to be spilled." A later spill can then copy these blocks in their entirety.

Two problem situations exist at this point:

• Because no trailer records exist on the active recovery tape, recovery processing with this tape is a problem. Backward recovery cannot function at all because the trailer records cannot be found. Forward recovery can function, but the recovery receives an I/O error.
• The second problem is that when executing forward recovery, the next Recovery File after the one with no End-of-File, detects errors because of the duplicated log records which require review.

The RXXFIX function eliminates these problems. By specifying a cycle number from the RESTART process, the utility copies all the good data to a new tape before any possible I/O error, stops reading the suspect tape, and closes the new complete, non-redundant tape, if a spill was ongoing at the time of the failure.