Northern Telecom DMS-100 Series Maintenance Manual page 50

4-16 Disk drive procedures
Procedure 4-9
Disk drive replacement procedure - installing the replacement disk drive
Step Description
8 Make the disk system redundant; make the
ONLY disk, PRIME mode.
Enter: (at the terminal)
>DISK MODE xx (cr)
where: xx = disk mode= AP = A PRIME
If the disk system does not achieve
redundancy, see Notes below and step 12;
otherwise, go to step 9 for some "finish up"
activities.
9 Return to the message procedure sheet that
referred to this procedure; finish the
Craftperson activity listed.
10 When all maintenance activities are
complete, be sure to replace the front panel
of the DPP.
11 Enter: (at the terminal)
>DISK FORMAT x (cr)
where:
x = drive
Proper response = FORMAT DONE
For BCS29 w/56K polling, response =
DISK FORMAT STARTED
After success completion of the FORMAT
operation, the FORMAT DONE message is
output.
Once this activity is complete, go to step 12.
297-1001-537 Standard 01.02 December 1993
= BP = B PRIME
CAUTION
This disk command may cause a loss of data. Perform the DISK
FORMAT procedure during a period of low data gathering
activity (low traffic) to avoid data losses.
= A = disk drive A
= B = disk drive B
(continued)
Notes
Make the ONLY disk PRIME mode. This
one has the newest polling data on it.
Proper response =
DISK MODE AP (or)
DISK MODE BP
Carefully line up the four captive screws of
the front panel with their mounting holes.
Tighten the captive screws; but do not bear
down.
Only if it is determined through contact with
NT, that it is absolutely necessary. Make
sure the operational disk drive is in DISK
ONLY mode before entering this command.
Note: The format command is not valid for
380 Mbyte disks w/o 56K polling.,
(continued)