Library partitioning

Libraries that contain at least two drives can configure two logical libraries. It is possible to configure up to 21 logical libraries in the library (up to the number of drives installed).

Partitioning of libraries

With full-height or half-height physical drives, physical numbering is bottom up for all drives. For example, if you replace a half-height drive in Figure 1, the drives are still numbered 1-4. If you add a drive in any of the slots in between drives numbered 1 and 4, the physical numbering changes and is still numbered bottom up.
Important: A full-height drive can be installed in a module in the lower two slots only.

Configuration of a 1-logical library system

A one logical library system contains all drives present in any drive positions, and it contains all the slots.

Configuration of multiple logical libraries

A library with multiple logical libraries must have a drive for each logical library and at least five slots. Drives can be in any location in the library. It is best to have drives that are located near the slots that are assigned to the same logical library to minimize accessor movement and maximize performance.

SCSI element-addressing

A logical library assigns SCSI element addresses to drives, storage slots, I/O slots, and the accessor. For each element type (drive, storage, I/O), the SCSI element address can be viewed on the Management GUI.

While SCSI addressing follows the same method as physical location-numbering, this action depends on the Advanced Logical Library configuration.

Drive numbering is from bottom to top. Storage slot-numbering is from left magazine (front to back, bottom to top) to right magazine (back to front, bottom to top). IO slot-numbering is from bottom to top. Accessor is single number.

Note: When the number of drives in your library are reduced, update the logical library configuration. This action removes all event notifications that indicate a drive is missing.

Updating the logical library configuration might change the SCSI element addressing.