StorageTek 6 manual Backup, Restart

Backup

summary report and to the SLSBKUP data set. Refer to Figure 11 on page 222 to see a sample discrepancy report. An errant and in-transit destination report, followed by a block processing report, also is produced in this case. Figure 11 shows these reports.

Note: The VOLSERs and cell locations that are discrepant are sorted into an incremental stack to reduce the amount of robotic movement.

Up to 10,000 discrepancies can be recorded for the Scratch and Select discrepancy types; 96,000 discrepancies or one ACS can be recorded for the Audit discrepancy type. Once these limits have been reached, discrepancy saving is discontinued. Discrepancies saved prior to reaching the limits are retained and output.

If you specify this option, normally SLSCNTL represents the current primary data set; SLSCNTL2 specifies the current secondary data set. However, if you are recovering from a link down or multi-host switch situation, SLSCNTL should remain the current primary CDS on one side of the link while SLSCNTL2 should be specified as the current primary CDS on the other side of the link. If you are sure which two CDSs should be compared, do not specify

SLSSTBY.

Upon restore, the discrepancy blocks are used to generate UNSCratch,

UNSElect, and AUDIt statements to the SLSAUDIT data set.

Note: It is better to use OPTion(Copy) for regularly scheduled backups of the HSC CDS. OPTion(Analyze) is designed to backup the CDSs when there may be discrepancies between copies of the CDS.

(Restart)

specifies to bypass the initial copy of the control data sets to the SLSCOPY data sets. This option is used when a system outage or job failure has occurred after the control data sets have been copied to the SLSCOPY data sets. Analysis of the previous backup run-time report indicates the successful copies.

If you have journals, the report should be inspected to determine if the journals were successfully reset. If they have not been reset, a backup should be taken again to obtain the most current control data sets prior to doing the journal resets.

If the journals have been reset, OPTion(Restart) should be used to obtain the information from the SLSCOPY data sets.

216VM/HSC 6.0 System Programmer’s Guide

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