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12 VM/HSC 6.0 System Programmer’s Guide
1st ed., 6/30/04 - 312579601
Automated cartridge mounts/dismounts are performed in response to calls to the tape
management interface. The HSC determines that a mount/dismount is required for a
volume under automated library control (cartridge resides in an LSM storage cell), and it
communicates with the appropriate LMU.
If the request is for a mount, the following information is communicated to the LMU:
• the LSM and panel/row/column in which the volume resides
• the destination LSM (where the volume is to be mounted on a transport).
If all drives in an LSM are busy, a cartridge can be moved to another LSM to satisfy the
mount request. This action is performed without operator intervention, since the pass-thru
port (PTP) makes the cartridge available to the attached LSM.
If the request is for a dismount, this information is passed to the LMU:
• the LSM, cartridge drive, and transport in which the volume resides
• the destination (storage cell, CAP, or PTP) of the cartridge.
JOURNALJOURNAL
C29335
JOURNAL
VM/XA HOST VM/SP HOST
ACS
SERVICE
MACHINE
ACS
SERVICE
MACHINE
MVS/XA
GUEST
MVS HOST
MVS/XA
(JES2 OR JES3)
JOURNAL
PRIMARY
CONTROL
DATASET
SECONDARY
CONTROL
DATASET
STANDBY
CONTROL
DATASET
Figure 3. Shared Library Data Sets