StorageTek 6 manual Mount/Dismount Functions, Mount Processing for Specific Volumes

Mount/Dismount Functions

Mount and dismount functions consist of the following processing:

•mounting specific volumes

•mounting scratch volumes

•dismounting library volumes

•handling abnormal mounts and dismounts

•virtual thumbwheel (VTW)

•automated tape transport cleaning.

The mount/dismount component receives the request sent by the tape management interface component and makes the mount/dismount of cartridges occur.

Each mount/dismount function is described in this section.

Several options exist to allow users to specify how they want mount/dismount to react in various situations. Refer to the ‘‘MNTD (Mount/Dismount Options) Command and Control Statement’’ in the HSC Operator’s Guide for a description of these options.

Mount Processing for Specific Volumes

The HSC determines when a library volume is to be mounted on a library-controlled transport. It maintains a record of the library location for each cartridge and instructs the LMU to mount the requested cartridge on the selected transport.

Mount processing occurs as a result of:

•the tape management system (TMS) interpreting a request for library transports

•issuance of the HSC operator Mount command

•change of the HSC from base service level to full service level

•startup of an HSC subsystem

•a clean request.

A volume may be temporarily or permanently entered into the library to satisfy a mount on a library transport. If a volume is temporarily entered into an LSM, a notation is made in the library control data set for this volume to be automatically ejected, via a CAP, when the volume is dismounted.

Chapter 2. Host Software Component Functions 33

1st ed., 6/30/04 - 312579601