VSM - What Can Cause A VTV To Become Fenced?

Asset ID:	1-71-1016428.1
Update Date:	2017-09-29
Keywords:

Solution Type Technical Instruction Sure

Solution 1016428.1 : VSM - What Can Cause A VTV To Become Fenced?

Applies to:

Sun StorageTek Virtual Tape Control Software (VTCS) - Version 6.2 and later
Sun StorageTek Enterprise Library Software (ELS) - Version 7.0 and later
Sun StorageTek VSM System - Version 4 and later
IBM z/OS on System z

Goal

What can cause a VTV to become fenced?

Solution

A fenced VTV can be a result of:

Failed Recall
VTSS takes a warm boot (restarts itself).
VTV was mounted and being written to during a power hit.
One or more hosts writing to a different CDS than is being used by other hosts.
The status of the VTV is not as expected as logged in the CDS.

This list is not all inclusive; it is possible there are other symptoms that can result in a fenced VTV.

For information regarding how to resolve the fenced VTV, please review the following documents:

How to Clear a Fenced VTV When There is a Good Copy on MVC <Document 1013163.1>
How to Clear a Fenced VTV When There is NOT a Good Copy on MVC <Document 1015872.1>

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