HP-UX tape drive device file requirements for NetBackup
The following table describes the requirements for tape drive device files.
Table: Tape drive device file requirements
Requirement | Description |
|---|---|
Berkeley-style close | NetBackup requires Berkeley-style close for tape drive device files. The letter b in the file name indicates Berkeley-style close device files. In Berkeley-style close, the tape position remains unchanged by a device close operation. (Conversely, in AT&T-style close, the drive advances the tape to immediately after the next end-of-file (EOF) marker.) To establish the correct position for the next tape operation, applications must assume the tape's position after a close. NetBackup assumes Berkeley-style close on HP-UX systems. |
Fast-tape positioning (locate-block) | HP-UX supports locate-block for most drive types for Fast Wide GSC SCSI adapters. For a list of drive types that NetBackup supports, see the Veritas Hardware Compatibility List: http://www.netbackup.com/compatibility NetBackup uses the locate-block command by default if a pass-through path is configured. To disable locate-block positioning, execute the following command: touch /usr/openv/volmgr/database/NO_LOCATEBLOCK When locate-block positioning is disabled, NetBackup uses the forward-space-file/record method. |
No rewind on close | NetBackup requires no rewind on close for tape devices. The letter n in the file name indicates no rewind device files. |