Mount Verification

Mount verification is a process of verifying a connection to the volume after an unseccessful I/O. It continues until the volume has been successfully verified or until mount verification timeout expires.

Causes

The following can cause mount verification:

• drive problems (such as a failed port)
• disk problems (hardware errors)
• controller/SAN fabric problems
• storage connection problem
• device is write locked manually while a write operation is in progress
• in a multipath configuration, paths to the device are switched

Symptoms

When mount verification starts, two messages are sent to the terminals: one to OPCOM and the other one directly to OPA0:.

Timeout

Mount verification (except in case of write locking) continues until it times out. The timeout is controlled with MVTIMEOUT and TAPE_MVTIMEOUT

Disabling

To disable mount verification on a device, mount it with /NOMOUNT_VERIFICATION.

See also

• OpenVMS System Manager's Manual Vol. II