IBM i series Handbook page 406

Externally Attached Automated Libraries
Features
• Model L32 (base frame)
The base library, the Model L32, has 141 to 281 cartridge slots. It supports up to twelve
IBM LTO Ultrium tape drives with an incremental reduction of storage slots for more than
four drives. Data capacity for the Model L32 is up to 14 TB native and up to 28 TB using
LTO Data Compression (LTO-DC) (2:1) compression.
Each Model L32 library has a standard 10-slot cartridge input/output station for importing
or exporting cartridges from the library without requiring a re-inventory. For bulk-loading
of IBM LTO Ultrium tape cartridges, the library door can be opened. Each time the library
door is closed, a barcode reader mounted on the auto changer scans the cartridge labels
enabling a re-inventory of the cartridges in the library frame in less than 60 seconds. A
door lock is included to restrict physical access to cartridges in the library. Customers can
expand the library capacity and number of drives to meet their changing needs.
• Model D32 (expansion frame)
Five expansion frames (Model D32) may be added to the base frame (Model L32) to add
storage or drive capacity. Each 3584 Model D32 frame supports up to 440 storage slots
and up to twelve drives, with incremental reduction of storage slots for each set of four
drives installed.
A fully configured 3584 with one Model L32 frame and five Model D32 frames supports up
to 72 drives.
• Multi-path support for heterogeneous server platforms with up to seventy-two
logical libraries
The heterogeneous sharing provided by the Multi-Path feature of the 3584 UltraScalable
Tape Library is a sharing of the library robotics. This is accomplished by partitioning the
library into multiple logical SCSI libraries, up to the number of drives installed. Each
logical library has its own separate and distinct drives, storage slots, and control paths.
I/O slots are shared on a first-come, first-served basis. This type of partitioning allows
heterogeneous applications to share the library robotics independent of each other. An
example of heterogeneous sharing is a Microsoft Windows NT application using the drive
and storage slots of one logical library, while a UNIX application uses the drive and slots
of another logical library.
Cartridges under library control are not shared between logical libraries, nor are they
allowed to be moved between logical libraries. Logical libraries can also be used for
scalable application performance.
The 3584 UltraScalable Tape Library can also be configured to support multiple SCSI
control paths to a common logical library, up to the number of drives installed. Multiple
control paths allow maximum flexibility in multi-server support and control path
redundancy.
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iSeries Handbook