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VTSS DBU has Exceeded the HAMT with Auto-Migration Active (Doc ID 1015698.1)

Last updated on JANUARY 06, 2012

Applies to:

Sun StorageTek Virtual Tape Control Software (VTCS) - Version: 6.0 and later   [Release: 6.0 and later ]
IBM z/OS on System z

Symptoms

DBU has exceeded the HAMT.
DBU has exceeded the high threshold.
VTVs are not being migrated from the VTSS fast enough.
Auto migration is active.

Changes

Production workload higher than anticipated.

Cause

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