This section provides notes on synchronous high-speed backup.
The processing of the backup
swstbackup (Backup execution command) cannot be executed until the transaction and backup volumes are in an equivalent state.
Backup policy settings
A backup policy can still be set up if the number of registered volumes is enough for snapshot type high-speed backup, even if the number is not enough for synchronous high-speed backup. In this case, synchronous high-speed backup cannot be performed.
Volume group operation under synchronous processing
If the backup volume is a volume group, do not execute the vgchange (1M) command under synchronous processing (EC/REC) execution. If this occurs and the backup volume is inactive then it cannot be re-activated. Additionally, it will not be possible to perform commands including those to stop synchronous processing, execute backup and cancel backup synchronous processing. If accidentally inactivated, use ETERNUSmgr/GRmgr or similar to forcibly stop synchronous processing, and then activate the backup volume.
