Capacity on Demand Features and Restrictions
140 SL500 User’s Guide • July 2008 Revision: KA • 96116
Cell Assignment Rules
The library controller uses the following rules when filling licensed storage cells with
cartridges:
■ All cells in column 1 are filled first, then the cells in column 2, then 3, and so on.
■ Cells within each column are filled from top to bottom, starting with the first row
after any reserved cells. For example, if the top three cells in a column are reserved,
cell assignment within the column starts with row 4.
■ Once all cells within a module are filled, cell assignment moves to the next module,
using the same top-to-bottom, column by column approach.
In partitioned libraries, the library controller applies these rules separately to each
partition.
Orphaned Cartridges in Non-Partitioned Libraries
Note – For a discussion of orphaned cartridges in partitioned libraries, see “Orphaned
Cartridges in Partitioned Libraries” on page 152.
In non-partitioned libraries, an orphaned cartridge is a cartridge located in an
unlicensed storage cell. Orphaned cartridges are inaccessible to all hosts.
A cartridge can become orphaned for a variety of reasons. Following are some possible
causes:
■ Licensed storage capacity has been reduced.
■ The cartridge has been moved to an unlicensed or inaccessible cell through manual
intervention.
Cartridge Expansion Module (CEM) after Base Module or DEM
As last module FullCEM 84
With any module underneath FullCEM 94
Cartridge Expansion Module (CEM) after CEM
As last module FullCEM 90
With any module underneath FullCEM 100
* All capacities assume no reserved cells and all CAPs are configured for enter and eject op-
erations.
Module License Value
Module
Licensed
Capacity *
Library
Total Count
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