HP Archive Backup System for OpenVMS Guide to Operations

Media Management
4.5 Jukeboxes
4.5.5 Control
4.5.6 Disabled
4.5.7 Groups
4.5.8 Library ID
4.5.9 Location
4.5.10 LSM ID
CAP 1, and so on. If a size is not specified, a default value of 40 is used. Specifying a cap size
optimizes the movement of volumes to and from the jukebox by filling the CAP to capacity for
each move operation.
The control attribute determines the software subsystem that performs robotic actions in the
jukebox. The control may be one of the following:
• MRD (Media Robot Device) - The default control uses SCSI commands to control the robot
in the jukebox. When you specify MRD, you should also specify slot count, robot device
name and a flag as to whether the jukebox supports magazines.
• DCSC (Digital Cartridge Server Component) - MDMS uses the DCSC subsystem to control
the device. When you specify DCSC, you should also specify library ID, ACS ID, LSM ID
and CAP sizes. DCSC is used for certain large silo devices only.
By default, jukeboxes are enabled, meaning that they can be used by MDMS and its applications.
However, you may wish to disable a jukebox from use because it may need repair or be
used for some other application. Set the disable flag to disabled the jukebox, and clear the flag to
enable the jukebox.
The groups attribute contains a list of groups containing nodes that have direct access to the
jukebox. Direct access includes direct-SCSI access, access via a controller such as an HSJ70,
and access via Fibre Channel. TMSCP access is not supported for jukeboxes. You can specify as
many groups as you wish, in addition to nodes that may not be in a group.
For DCSC-controlled jukeboxes, the Library identifier specifies the library that this jukebox is
in. Each MDMS jukebox maps to one Library Storage Module (LSM), and requires the specification
of the Library, ACS and LSM identifiers.
The location attribute specifies the physical location of the jukebox. Location can be used as a
selection criterion for selecting volumes and drives. Specify an MDMS-defined location for the
jukebox. This location may be the same as, or different from, the onsite location that volumes are
stored in when not in a jukebox. If different, moves from the jukebox to the onsite location and
vice versa will be done in two phases: jukebox to jukebox location, then jukebox location to
onsite location, and vice versa.
For DCSC-controlled jukeboxes, the Library Storage Module (LSM) identifier specifies the
LSM that comprises this jukebox. Each MDMS jukebox maps to one Library Storage Module
(LSM), and requires the specification of the Library, ACS and LSM identifiers.
4-10 Media Management