Northern Telecom DMS-100 Series Maintenance Manual page 120

4-86 Disk drive procedures
Procedure 4-42
Disk drive hardware error messages - procedures
297-1001-537 Standard 01.02 December 1993
Select:
c. Change the disk mode to PRIME mode.
d. Switch processors.
CAUTION
This action may cause a loss of data.
e. Replace the disk drive.
CAUTION
Since all circuit assemblies in the DPP are static sensitive, be
careful handling them.
(continued)
(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 c.) (If
unsuccessful, 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 d.)
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 e.)
= AP = A PRIME
= BP = B PRIME
or
DISK MODE: BP