About fast-tape positioning (locate-block) on AIX
Applies to AIT, DLT, Exabyte, and half-inch cartridge tape drives.
To position a tape to a specific block, NetBackup supports the SCSI locate-block command.
NetBackup uses the locate-block command by default.
Veritas recommends that you do not disable locate-block positioning. If you need to disable it, execute the following command:
touch /usr/openv/volmgr/database/NO_LOCATEBLOCK
With locate-block positioning disabled, NetBackup uses the forward-space-file/record method.