The read/write sharing of CMS minidisks is accomplished by allocating a control area beyond the logical end of the CMS minidisk. This area acts as a control for synchronizing access to the minidisk. Each participating system is assigned its own lock record within this control area.
If a system retains a lock for the period of time specified by the REMINDER record, CA VM:Tape sends a message to the operator indicating a possible lockout condition.
Use the CA VM:Tape SDC command to display, set, and clear locks, as shown below.
Note: For complete syntax information about the SDC command, see the Command Reference Guide.
Use the VMTSDF utility to unlock a minidisk when none of the CA VM:Tape systems can be initialized because of an outstanding lock.
Note: For complete format information about the VMTSDF utility, see VMTSDF Utility.
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