Northern Telecom DMS-100 Series Maintenance Manual page 66

4-32 Disk drive procedures
Procedure 4-15
Disk condition and disk file error messages - procedures
297-1001-537 Standard 01.02 December 1993
(continued)
iii. Put the disk system in PRIME mode, if
necessary.
- Enter:
>DISK MODE xx (cr)
where: xx = disk mode
Proper response = DISK MODE: AP
- For any other response, see the procedure
for that message and perform the activities
listed.
iv. If unsuccessful after PCA replacement and
processor switch, go to step c. Return the
original PCA to its position before proceeding.
c.If no disk activity starts, determine the last known
disk mode.
Check the printouts for the last disk mode.
- If the disk mode was AO or BO, remove that
disk (or pull the power plug from the power
supply, P8), to protect the data on that disk.
·
go to step d.
- If the disk mode was AP or BP , remove
either disk (or pull the power plug from the
power supply, P8) to protect the data on that
disk.
·
go to step d.
d.Replace disk with a spare disk drive (if available).
Install the spare disk drive.
(continued)
(at the terminal)
= AP = A PRIME
(from disk mode AO)
= BP = B PRIME
(from disk mode BO)
DISK MODE: BP
or