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The tape drive has a mini-SAS connector. The connector is keyed in location 4, which is the standard
location for end devices. If you use a cable other than the one recommended for use with the product,
verify that it is keyed in location 4.
CAUTION:
Mini SAS connectors are keyed. Do not force a SAS cable mini-SAS connector into the tape drive
mini-SAS port because it might be keyed differently.
World Wide identifiers
A unique identifier called a World Wide Name (WWN) or World Wide Identifier (WWID) identifies a SAS
tape drive. The library assigns the World Wide identifier to the drive bay. When a tape drive is replaced,
the World Wide identifier is reassigned to the new tape drive.
The operating system tracks the World Wide identifier for the drive on each HBA channel. Each of the
drive connectors on a fanout cable is associated with an HBA channel. Once a drive has been connected,
keep it on the same channel to retain the association between the HBA channel and World Wide
identifier.
Library partition guidelines
Partition constraints
The library has a flexible partitioning scheme with the following constraints:
•
Each partition must have at least one tape drive. One tape drive in each partition hosts the library LUN
for the partition.
•
The maximum number of partitions is 21.
•
Magazine slots are allocated to partitions in four- or five-slot groups, depending on whether the
magazine slots are located in the bottom module or not.
•
Mailslots must be enabled for a module before they can be allocated to a partition.
A partition does not need to have a mailslot. If a partition does not have a mailslot, the magazine must
be accessed to import or export cartridges. Opening a magazine takes the library off line.
Although the mailslot magazine is shared between partitions, the mailslot elements are assigned
individually to partitions.
Partition wizards
Wizards guide you through the partition configuration process. The wizards are only accessible from the
RMI.
•
Basic Partition Wizard – You specify the number of partitions. The wizard removes the current
partition configuration and assigns the drives and storage slots as evenly as possible to the partitions.
Any extra drives or slots are assigned to the first partition.
Use the Basic Partition Wizard to configure partitions that will have similar resources. For a library with
a single partition, use the Basic Partition wizard to configure the number of barcode characters to
report to the host application and whether to report them from the left or right end of the label.
•
Expert Partition Wizard – You add or remove partitions from the current partition configuration and
then edit each partition configuration to add or remove library resources.
Library partition guidelines
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