Sun Oracle StorageTek SL150, System Assurance Manual, Page: 34 / 62

Partitioning—Feature
34 SL150 Systems Assurance July 2012
• Each partition designates tape drives solely to its partition, the other partition
cannot use these tape drives.
• Partition users must anticipate how much storage area is needed for their resident
tape volumes and the amount of free slots required. Once storage needs are
defined for the two partitions within the library, sufficient modules need to be
present within the library to accommodate this need. Purchase and install up to 9
expansion modules below the base module (Module 1). Each module contains 2
drive slots and 30 storage slots. There are 15 slots per magazine.
The SCSI element numbering within partitioned libraries is continuous for each
partition.
The customer has the choice of a non-partitioned library or a partitioned library with
2 partitions. When a partitioned library is desired, the library uses the following
simple method for dividing the resources in 2 partitions:
• Storage Slots
• Partition 1 owns all storage slots on the left side of the library.
• Partition 2 owns all storage slots on the right side of the library.
• Tape Drives
• Partition 1 owns the top tape drive in the base module and the top tape drive
in each additional expansion module.
• Partition 2 owns the bottom tape drive in the base module and the bottom
drive in additional expansion module.
• Mailslot Elements
• The mailslot elements are shared by both partitions.
Using FIGURE B-1 on page 35 as an example, partition one owns the left side of the
base and the expansion modules, SCSI element numbering begins at the first
available slot in the base module and continues through the expansion module slots.
The first drive in the top module will begin the element numbering for partition 1
and continue to each top drive slot in all expansion modules that are installed.
The library will discover the current number of modules at each boot up. If you shut
down the library and then boot up, the partitions will redefine to the current number
of modules.
After ENABLING partitioning, the library sets the bridged drive for each partition:
• The bridged drive for partition 1 is the top drive in the base module. Partition 1
owns all tape drives in the top slot of each module.
• The bridged drive for partition 2 is the bottom drive in the base module. Partition
2 owns all tape drives in the bottom slot of each module.