Setting The Autoloader Operating Mode; Random Mode; Sequential Mode - HP StorageWorks vs80 User Manual

Setting the Autoloader Operating Mode

42 Autoloader Administration
The autoloader operating mode is determined by whether or not you are using
backup software that can control the autoloader robotics. If you are using such
software, then the autoloader operates in Random mode. If you are not, then
the autoloader operates in Sequential mode.

Random Mode

If you are using software that can control the autoloader's robotics, the
autoloader will detect this and switch to Random mode. In Random mode, the
autoloader will not automatically load tapes into the drive; instead it will wait
for commands from the software.
Note Your backup software must support the autoloader's robotics,
which may require the additional installation of an autoloader
software module. For more information, refer to your backup
software documentation.

Sequential Mode

The autoloader initially assumes that you are not using a backup software
package to control cartridge or drive activity, and consequently operates in
Sequential mode. With sequential mode, when the first tape is full or unloaded
for any reason, the autoloader automatically removes the tape from the drive,
puts it in its original slot, and then loads the next available higher numbered
slot.
Operating in Sequential mode also allows you to determine the behavior for
how tapes are loaded into the autoloader's tape drive. This is done from the
autoloader front panel by setting:
Circular Mode options (see
Autoload Mode options (see
Circular Mode on page 43)
Autoload Mode on page 44)
Chapter 3