Nortel North American DMS-100 Instruction Manual page 129

1-114 Trouble locating and clearing procedures (continued)
Replacing a 14-in. disk drive unit
Replacing a 14-in. disk drive unit
At your current position
1
2
At the MAP terminal
3
IOD
IOC
STAT
4
5
297-8021-544 Standard 14.02 May 2001
CAUTION
Loss of service
Disk allocation is difficult and the possibility for a severe
error exists. Contact the next level of support before you
perform this procedure.
Obtain the following items:
• a light source
• a mirror
• a set of nut driver
• a 1/4-in. flat-bladed screwdriver
• side cutters
• cable ties
Obtain a shipping carton for the DDU that has faults and you will replace. If
possible, use the carton that stores the new DDU.
To access the IOD level of the MAP display, type
>MAPCI;MTC;IOD
and press the Enter key.
Example of a MAP display:
0 1
L .
Note any alarm under the IOD header and the type of alarm.
To post the IOC for the DDU that has faults, type
>IOC ioc_no
and press the Enter key.
where
ioc_no
is the number of the input/output controller (IOC) that holds the
controller card for the DDU (0 to 19)
Example of a MAP display:
(continued)