Technical data

Chapter 3
Running the MicroVAX Diagnostic
Monitor (MDM)
The MicroVAX Diagnostic Monitor (MDM) is an optional software package
containing diagnostic tests that isolate and identify faults in your system.
MDM also lets you display your system configuration and test how devices
work together.
MDM is on tape, in a cartridge labeled MV DIAG CUST TK70. MDM
operating instructions begin in Section 3.2.
CAUTION: If your system is connected to a cluster, notify your cluster
manager before halting the system to load MDM.
You generally run MDM in four situations:
• Before you install software on a new system
• After you add a device to your system
• After you receive an error message or experience a system problem
• When you want to test your system periodically to ensure that all
components are operating correctly
3.1 MDM Limitations
MDM tests internal devices in your system, but it performs limited
diagnostics.
• MDM reads from each drive and checks each controller, but it does not
write to the drives because that could destroy data.
NOTE: MDM tests a tape or diskette drive only after the medium (tape
or diskette) is inserted into the drive.
• MDM checks devices on the system as well as the system and
interconnects.
Running the MicroVAX Diagnostic Monitor (MDM) 3–1