Technical data

• You can boot MDM manually from a TF85, TK50 or TK70 tape drive
(Section 3.3.1.1).
• You can use the autoboot feature to boot MDM only from a TK50 or
TK70 tape drive (Section 3.3.1.2).
NOTE: If your system is part of a local area network (LAN), you can reduce
the time required to load MDM by obtaining the MicroVAX Ethernet Server
Customer Diagnostics Kit. That kit lets you install MDM on a host system
and downline load MDM to other systems that are part of the LAN, using
the DECnet/Ethernet network facilities.
3.3.1.1 Booting MDM Manually
Use this procedure to boot MDM from a TF85, TK50 or TK70 tape drive.
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. Make sure the Write-Protect switch on the tape cartridge is in the write-
protect position.
3. If your system contains software, write-protect all disk drives and RF-
series ISEs.
4. Move the Break Enable/Disable switch to enable (up).
5. Restart the system.
6. After the green light on the tape drive glows steadily (orange and yellow
lights go out), insert the tape cartridge containing MDM into the tape
drive and lock it in place.
7. Tell your system to load MDM from the tape cartridge:
For a TK50 or TK70 tape drive, enter the command BOOT MUx0,
where x is the controller port letter.
For a TF85 tape drive, enter the command BOOT/100 MIx0, where
x is the controller port letter. Then, when your system displays
Bootfile:, enter [SYS0.SYSEXE]MDM.SYS (the boot file name).
Loading MDM takes several minutes. A green light on a TK50 drive
or a yellow light on a TK70 or TF85 drive blinks while loading occurs.
Section 3.4 describes the display you see after loading completes.
8. After loading completes, make sure all RF-series ISEs are on line.
3–6 VAX 4000 Model 200 Troubleshooting and Diagnostics