Technical data

2. Set the Break Enable/Disable switch on the host to be tested to enable
(up).
3. Insert a blank tape cartridge into the tape drive and lock it in place.
4. Restart the host to be tested.
5. Enter one of these commands, where n is the unit number of the disk
containing the Hard Disk Kit and x is the controller port letter.
BOOT/100 DIAn (CPU-based DSSI)
BOOT/100 DUxn (KFQSA adapter or KDA50 controller)
The system prompts for the boot file name by displaying Bootfile:
6. Enter one of these file names.
[SYS0.SYSEXE]MDMSHA.SYS (CPU-based DSSI)
[SYS0.SYSEXE]MDM.SYS (KFQSA adapter or KDA50 controller)
Then press
Return
to continue booting.
7. Run MDM as described in Section 3.3.
8. After you complete the tests on the first host:
a. Make sure the Break Enable/Disable switch is set to enable (up)
and press the Restart (BA215: Restart/Run) button on that host.
b. After the countdown completes and the >>> prompt displays, boot
MDM from the second host using the procedure described in steps
2 through 6.
c. Run MDM as you did for the first host.
3.2.3.2 MDM on a Dual-Host System with Two Tape Drives
To run MDM on a dual-host system with two tape drives:
NOTE: You can also use the MDM Hard Disk Kit as described in the
previous section.
1. If software is installed on your system:
a. Warn all users to log off.
b. Perform system shutdown as described in your software manuals.
2. Set the Break Enable/Disable switch on the host to be tested to enable
(up).
3–4 VAX 4000 Model 200 Troubleshooting and Diagnostics