Northern Telecom DMS-100 Series Maintenance Manual page 123

Procedure 4-43
Disk drive hardware error messages - procedures
Select:
d. Change the disk mode to PRIME mode.
e. Switch processors.
CAUTION
This action may cause a loss of data.
f.
(continued)
DPP Recovery and Routine Maintenance Guide BCS35 and up
(continued)
i) The recommended procedure is Procedure 4-5.
ii) The alternate procedure is Procedure 4-6. (If
unsuccessful, go to step e.) (When init activity is
complete, go to step d.)
Enter: (at the terminal)
>DISK MODE xx (cr)
where: xx = disk mode
Proper response = DISK MODE: AP
i) For any other response, see the procedure for
that message and perform the activities listed.
ii) If successful, procedure complete. (If
unsuccessful, go to step e.)
i) See Switch and Status Panel Operation, Ch. 7 in
297-1001-536: DPP Card Replacement Guide .
ii) Repeat steps b, c, and d. (If unsuccessful, go to
step f.)
Replace the disk drive.
Disk drive procedures 4-89
= AP = A PRIME
= BP = B PRIME
or
DISK MODE: BP