To determine more specifically how you want tapes loaded into the tape drive while in Sequential mode,
set the
Loop
and
Autoload
options.
◦ When
Autoload
mode is set, the device automatically loads the cartridge from the lowest-numbered
full slot into the tape drive. It then follows standard sequential operation. After configuring Autoload
mode, you must do one of the following for Autoload mode to take effect:
– Power cycle the device from the front panel.
– Reboot the device from the RMI Support > Reboot screen.
– Move the lowest-numbered cartridge to the drive before starting the backup application. If the
mailslot is enabled, the lowest cartridge location will be in the mailslot.
◦ When
Loop
mode is on, the original first cartridge in the sequence is reloaded after the device has
cycled through all available cartridges. If Loop mode is off and the last cartridge has been unloaded,
the device stops loading cartridges. The device waits until an operator loads another tape.
CAUTION:
Use caution when choosing Loop mode because it makes it possible to overwrite data on
previously written cartridges.
When the device is partitioned into logical libraries, each logical library operates as an independent library.
The device only loads tapes from the slots associated with one logical library into the tape drive associated
with that logical library. The library will not load tapes from slots associated with another logical library.
Only the lowest-numbered tape drive in a multidrive logical library will be used.
Automatic mode
: In Automatic mode, the device switches from Sequential mode into Random mode
when it receives certain SCSI commands. Automatic mode is the default setting.
• Reserved Slots — The number of slots in the logical library that are not available to the backup software.
You can store cleaning tapes in reserved slots, or leave reserved slots empty. The slots are reserved from
the highest slot number down. The default is to make the maximum number of slots active. Each logical
library must have at least two active slots.
• Enable Library Control Path Failover — This option provides a mechanism where a library control path
hosted by a Fibre Channel drive can be reassigned to an alternative drive retaining all worldwide names,
configuration settings, and with minimal interruption to current operation. The reassignment takes placed
when the primary master drive is powered off for service. Reassignment can allow a backup to complete
when the master drive suffers a problem and must be removed for service.
The Alternate Drive for Library Control Path will be displayed as N.A until these requirements are met:
◦ The library must have two or more LTO-5 or LTO-6 Fibre Channel drives of the same type (for example,
LTO-generation and form factor).
◦ If the library is partitioned into multiple logical libraries, each logical library must contain at least two
LTO-5 or LTO-6 Fibre Channel drives.
◦ A host connection through a SAN switch with NPIV is enabled for associated ports.
◦ All drive ports are configured as Fabric.
78
Operating the library
