Backup history information can be referenced using the swsthistdisp command.
Backup history information can be deleted using the swsthistdel command.
Point
Even when the history information created during backup operations with the suspend specification is deleted, an associated EC session is not released.
Deleting history information during ordinary synchronous high-speed backup releases the backup volume, and "Backup(free)" is displayed in the Device-Mode column by the swstdevdisp command.
Deleting history information during backup operations with the suspend specification does NOT release the backup volume after the information is deleted, and "Backup(used)" is displayed in the Device-Mode column by the swstdevdisp command.
The process of deleting ordinary backup history information and backup history information with the suspend specification is shown below.
Figure 4.8 Deleting Ordinary Backup History Information and Backup History Information with Suspend Specification
