Northern Telecom DMS-100 Series Maintenance Manual page 142

4-108 Disk drive procedures
Procedure 4-48
Disk drive hardware error messages - procedures
297-1001-537 Standard 01.02 December 1993
(continued)
Select:
i) The recommended procedure is Procedure 4-5.
ii) The alternate procedure is Procedure 4-6.
(When init activity is complete, go to step b.)
b. Change the disk mode to PRIME mode.
Enter: (at the terminal)
>DISK MODE xx (cr)
where: xx = disk mode
Proper response
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 c.)
c. Verify that the power input and other cabling on
that chassis are correct.
i) If cabling is correct, go to step d.
ii) If incorrect, make any necessary corrections.
iii) After making any necessary corrections, repeat
steps a and b. If still unsuccessful, switch
processors. Repeat steps A and B. If
successful, to to step D. If unsuccessful, go to
step E.
d. Replace the Disk (SCSI Intf) Interface PCA in slot
11 of the standby chassis
i) See Printed Circuit Assembly Replacement in
297-1001-536: DPP Card Replacement Guide .
ii) If the problem is not cleared after PCA
replacement and restart, go to step e. Return
the original PCA to its position before
proceeding.
e. Replace the suspect disk drive.
(continued)
= AP = A PRIME
= BP = B PRIME
= DISK MODE: AP
or
DISK MODE: BP
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