Northern Telecom DMS-100 Series Maintenance Manual page 91

Procedure 4-25
Disk condition and disk file error messages - procedures
c.Change the disk to PRIME mode.
d.Switch processors.
e.Replace the Disk Interface PCA in slot 11 of the
CAUTION
Since all circuit assemblies in the DPP are static sensitive, be
careful handling them.
(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. (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.)
standby chassis.
Disk drive procedures 4-57
= AP = A PRIME
(from A ONLY)
= BP = B PRIME
(from B ONLY)
or
DISK MODE: BP