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54 StreamLine™ SL8500 Modular Library System User's Guide • March 2007

Revision K • 96154

How CAP Reservations Work in a Partitioned Library

In a partitioned library, CAPs are shared by all partitions. When entering or ejecting 

cartridges, a partition reserves the CAP for its exclusive use. Before the CAP can be 

made available to other partitions, the host must complete the enter or eject operation 

and leave the CAP empty and in an unreserved state. 

In normal operations, the CAP reservation is released in the following ways:

■

Enter operations—After all cartridges have been successfully entered into the library, 

the requestor must explicitly terminate the enter command. The library releases the 

CAP after verifying that the CAP is closed and empty. 

■

Eject operations—After all cartridges have been successfully ejected, the ACSLS or 

HSC host automatically terminates the eject operation. The library releases the CAP 

after verifying that the CAP is closed and empty. 

If for some reason a CAP reservation is not released as described above, the CAP will 

be unavailable to other all partitions, and cartridges belonging to the first partition may 

remain in the CAP. In this case, it is recommended that you identify the partition 

holding the CAP reservation and then terminate the enter or eject from that host. This 

ensures a normal release of the CAP reservation. 

See the ACSLS or HSC documentation for details about terminating enters and 

ejects. 

In some cases, however, you may not be able to access the host holding the reservation 

and therefore cannot perform a normal release of the CAP. This may be because the 

host has terminated or because you lack physical access or security authorization to 

issue commands to the host. In these cases, you can use the SLConsole to override the 

CAP reservation (unreserve). See 

 for the 

detailed procedure. 

Use extreme care when using the SLConsole to override a CAP reservation. If 

you do not complete the procedure, the CAP could be left unavailable to all partitions, 

and/or cartridges assigned to one partition could be entered into another partition.

You can use the SLConsole to override a CAP reservation only in a partitioned 

library. If a library is not partitioned, CAP reservations must always be released 

through ACSLS or HSC. 

Overriding a CAP Reservation

This topic applies to partitioned libraries only. If a library is not partitioned, 

CAP reservations must always be released through ACSLS or HSC. See the ACSLS and 

HSC documentation for details.

Use this procedure when a partition has reserved a CAP, but the reservation cannot be 

released through the ACSLS or HSC host.