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Managing Tapes How BIM-EPIC Selects Tapes for Mounting
Chapter 2. BIM-EPIC Online Manager 2-41
How BIM-EPIC Selects Tapes for Mounting
BIM-EPIC controls which tapes can be used for output. It checks the volume serial number of
every tape processed. If the mounted volume is controlled, its serial number is compared with
its corresponding DSN Catalog entry for scratch status before it can be used as output.
If the tape is uncontrolled, BIM-EPIC checks to see if the volume serial number is unique
within the DSN Catalog. If the tape passes this test, it is added to the DSN Catalog and used
automatically. If it does not, the tape is unloaded and a new tape requested.
If the file has no restrictions, the operator can mount any valid scratch tape which does not
belong to a tape pool.
If the file belongs to a tape pool, BIM-EPIC issues a general request for a scratch or a specific
mount from that pool.
If revolving tapes are used, BIM-EPIC issues a general request for a scratched revolving tape
from that dataset.
If the tape is not already mounted, BIM-EPIC requests the operator to mount the volume serial
number of the last tape used for that multi–file group.
Ordinarily, no BIM-EPIC–controlled tape can be used to write an uncontrolled dataset.
If ACL support is activated, BIM-EPIC always attempts to satisfy a mount using an ACL
volume. The ACL volume must meet the criteria of scratch status, mode, drive, availability,
and so on, to be selected. If the ACL cannot satisfy the mount request, normal AVR is
attempted, followed by the operator mount request message.
ACL cartridges should never be pre–mounted, unlike normal drives which can benefit from
AVR.
Introduction
Single or Prime
Dataset Output
Subdataset Output
Uncontrolled
Datasets
ACL Support
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