Northern Telecom DMS-100 Series Maintenance Manual page 118

4-84 Disk drive procedures
Procedure 4-41
Disk drive hardware error messages - procedures
297-1001-537 Standard 01.02 December 1993
b. Change the disk mode to PRIME mode.
c. Switch processors.
CAUTION
This may cause a loss of data.
d. Replace the disk drive.
CAUTION
Since all circuit assemblies in the DPP are static sensitive, be
careful handling them.
e. Call for technical assistance.
(continued)
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.
iii) If unsuccessful, go to step c.
i) See Switch and Status Panel Operation, Ch. 7 in
297-1001-536: DPP Card Replacement Guide .
ii) Repeat steps a and b. (If unsuccessful, go to
step d.)
i) See Disk Drive Procedures, Replacing Disk
Drive, Procedure 4-8,
ii) Repeat steps a and b. (If unsuccessful, go to
step e.)
End
= AP = A PRIME
= BP = B PRIME
or
DISK MODE: BP