Sequential mode — In Sequential mode, the device automatically loads and unloads tapes
from the drive. Sequential mode is used when the backup software is NOT robotics-aware
or was designed for standalone drives only.
In Sequential mode, the logical library will only use the lowest-numbered tape drive in the
The operator begins the sequence by loading the desired tape into the tape drive. When a
tape is unloaded for any reason, the device automatically removes the tape from the drive,
returns it to its original slot, then loads the tape from the next available higher numbered
To further determine how you want tapes loaded into the tape drive while in Sequential
mode, you can 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
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 until you load another
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. Thus, the device only loads tapes from the slots associated with one
logical library into the tape drive associated with that logical library; it will not load tapes from
slots associated with another logical library. Only the lowest-numbered tape drive in a
multi-drive 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
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 that is hosted by a Fibre Channel drive can be reassigned to an alternate 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. This can be helpful to allow a backup to complete when the master drive suffers a
problem and it is necessary to remove the drive for service.
The Alternate Drive for Library Control Path will be displayed as N.A until these requirements
Using the RMI