Technical information

9871 Tenth Edition 1-3
9360 Library Storage Module
The LMU sends instructions to the LCU attached to the LSM designated in the
move request. The LCU decodes the instructions into specific move commands,
and sends the commands to the LSM robot, where they are executed.
■ 9360 Library Storage Module
The LSM houses the cartridges and the robot. The 9360 LSM can be configured
for three different storage capacities–approximately 500, 750, or 1000 cartridges.
Storage capacity depends on the number of walls used to attach cartridge drives
or tape drives, pass-thru ports (PTPs), and cartridge access ports (CAPs)
installed.
Up to sixteen 9360 LSMs can be connected in a single ACS. If the cartridge
drives or tape drives are busy in one LSM, cartridges are automatically sent, by
way of a PTP, to the next LSM that has an available drive.
The access door on the 9360 LSM contains one or two CAPs and one priority
cartridge access port (PCAP).
Cartridge Access Port
The CAP is the storage area where you add cartridges to or remove cartridges
from an LSM without interrupting normal mounts and dismounts by the robot.
The CAP is on the LSM access door.
The standard CAP consists of two magazines, each containing 10 cartridge
storage cells. An optional CAP consists of three magazines, providing a total
capacity of 50 cartridges.
You can leave the magazines in the CAP and place single cartridges into the
magazine cells. You can also remove the magazines, load them with cartridges,
and place the magazines into the CAP.
In data processing environments where numerous enter and eject operations
are performed, you can maintain two sets of magazines. One set is in the CAP,
receiving cartridges in an eject operation; another set is outside the CAP,
preloaded with cartridges, ready to be placed in the CAP for an enter operation.
Priority Cartridge Access Port
The PCAP is the storage area where you add one cartridge to or remove one
cartridge from an LSM. A cartridge entered or ejected into the PCAP takes
priority over the movement of cartridges in the CAP. When the PCAP operation
is complete, the robot resumes its enter or eject operation through the CAP until
finished.