Scratch volume selection occurs during the mount process and can be done by the operator, by CA VM:Tape, or by LMS. When LMS is called upon to make a scratch volume selection and the user specifies a CA VM:Tape scratch pool name that is not defined to LMS, an error is issued and the mount request is canceled.
As part of the rules set up for LMS reduction, a scratch pool recommendation can be made. This recommendation is ignored if the user has specified an explicit pool or if Autopick is ON. If the recommendation is not a valid CA VM:Tape scratch pool, then a warning is issued and the recommendation is ignored.
When LMS is called upon to make scratch volume selection then it is important to know which volumes are in scratch status according to CA VM:Tape. Therefore, CA VM:Tape and LMS information must be synchronized.
An ARM product is synchronized with CA VM:Tape when its volumes reflect the same scratch status. Synchronization occurs with the SCRATCH and REFRESH commands. The process of synchronization involves changing the scratch status of volumes found in an ARM unit to correspond to the CA VM:Tape scratch status.
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