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The Sequential mode supports certain backup applications that do not manage
media. During backup, when one cartridge is read or written to the end of the
tape the autoloader, automatically returns that cartridge to its slot and loads
the cartridge from the next higher numbered slot to the tape drive to be read
or written to. This continues until the backup has sequentially accessed and
used all available cartridges. The autoloader does not move the media until the
host requests the tape drive to unload the tape through a SCSI unload
command.
Important
In Sequential mode, the medium changer
does not appear in the Device Manager.
The medium changer reappears in
Device Manager if you return the system
to Random mode. This is to allow for
operating systems that do not support
multiple LUNS.
In Seq Cycle mode, which is an option of the Sequential mode, the autoloader
automatically starts over with magazine slot 1 when the last cartridge is used
(slot 16 or the highest filled slot). If this change mode is not set, the autoloader
stops when the last cartridge available has been used. In Seq Cycle mode the
autoloader continues to cycle until you stop it.
To set the Change mode:
1 From the Main menu, click Configuration, then press ENTER. The
Configuration submenu opens.
2 Scroll to Change Mode, then press Enter. The mode options appear. A
check mark appears next to the currently enabled mode.
3 Do one of the following:
■ To leave the mode the same, press Esc.
■ To modify the change mode, scroll to the mode to you want, then
press Enter. “Reboot to enable new mode” appears on the LCD.
4 Press and hold the power button on the front panel until “System
Shutdown wait 60 sec” appears on the LCD, then release it. “Power Off”
then appears on the LCD and the autoloader shuts off.
5 Press the power button again to turn on the autoloader. The new change
mode is now in effect.
Sequential mode operations
If you enable Sequential mode, you must use the Sequential Ops submenu under
the Commands menu to operate the autoloader after you reboot.
■ The Start command lets you load the first cartridge.
■ The Resume command lets you continue from the next unused slot, if you
stopped the cycle.
■ The Stop command lets you stop the cycle.
To start Sequential mode operation:
1 From the Main menu, scroll to Commands, then press ENTER. The
Commands submenu opens.
2 Scroll to Sequential Ops, then press ENTER. The Sequential Ops submenu
opens.
3 Scroll to Start, then press ENTER. “Moving first tape to drive” appears on
the LCD.