Sun Microsystems SL500 Cell Assignment Rules, Orphaned Cartridges in Non-Partitioned Libraries

Capacity on Demand Features and Restrictions

		Module
		Licensed	Library
Module	License Value	Capacity *	Total Count
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.

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.

140 SL500 User’s Guide • July 2008 Revision: KA • 96116