Northern Telecom DMS-100 Series Maintenance Manual page 83

Procedure 4-21
Disk condition and disk file error messages - procedures
Try to put the ONLY disk drive in PRIME mode.
i. Change the disk to PRIME mode.
Enter:
>DISK MODE xx (cr)
ii. For any other response, see the procedure
for that message and perform the activities
listed.
iii. If successful, procedure complete. (If
unsuccessful, go to step c.)
Switch processors. Repeat steps a and b.
i. If successful, replace the Disk Interface PCA in
slot 11 of the standby chassis.
ii. See Printed Circuit Assembly Replacement in
297-1001-536: DPP Card Replacement Guide .
(If successful, procedure complete.)
iii. If unsuccessful after PCA replacement and
restart, go to step d. Return the original PCA to
its position before proceeding.
Repeat steps b and c.
i. If successful, procedure complete. (If
unsuccessful, go to step e.)
Call for technical assistance.
End
DPP Recovery and Routine Maintenance Guide BCS35 and up
Disk drive procedures 4-49
(continued)
(at the terminal)
where: xx = disk mode
= AP = A PRIME
(from A ONLY)
= BP = B PRIME
(from B ONLY)
Proper response = DISK MODE: AP
DISK MODE: BP
or