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CentricStor - Virtual Tape Library Procedures
Case 2: The logical volume has been modified.
a) The VLM informs the PLM that the logical volume is to be copied onto
tape.
b) The PLM selects a suitable tape cartridge: a completely new tape, a
scratch tape, or a tape onto which writing has not yet resulted in an
overflow. If this cartridge is not yet mounted, the PLM checks whether a
real drive is available in the robot archive at this point.
c) The PLM requests the selected real tape cartridge to be mounted, if
required, and begins data transfer from the RAID system to the tape.
The data of the logical volume is retained on the RAID system until deleted by
the VLM in accordance with the LRU procedure.
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