Sun Microsystems SL500 User Manual

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

For a discussion of orphaned cartridges in partitioned libraries, see 

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. 

As last module

FullCEM

84

With any module underneath

FullCEM

94

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.