SDC Command

[Authorization: OPERATOR]

Use the Shared Disk Command (SDC) to display and clear read and write locks on the minidisks that contain the CA VM:Tape TMC and the CA VM:Tape Audit file.

This command is useful when two or more CA VM:Tape systems share the TMC and Audit file. It is valid only for CMS systems running with the Shared Disk Facility.

Multiple read locks can exist simultaneously. Only one write lock can exist at a time. However, because each system sets its own lock record before it determines whether any other locks are set, this command might occasionally show more than one write lock outstanding.

Each CA VM:Tape service virtual machine clears its own locks during initialization. If you cannot restart your CA VM:Tape service virtual machine, run this command from another system to clear your system's locks.

If you cannot initialize any of the CA VM:Tape systems because of an outstanding lock, see VMTSDF Utility in the Administration Guide. This provides information about clearing the lock.