Disk: Both Disks Contained Preferred Status - Northern Telecom DMS-100 Series Maintenance Manual

Procedure 4-20
Disk condition and disk file error messages - procedures
Notes:
Note 1: If the failure is because the PRIME disk has a read error, the backup operation will fail. In this case, all secondary
call record data should be removed from the disk. Do this only if the Collector (data collection/polling) facility approves first.
Procedure 4-21
Disk condition and disk file error messages - procedures
1 (log message)
DISK: BOTH DISKS
CONTAINED PREFERRED
STATUS
2 Alarm Level:
No disk mode switch
i. See Disk Drive Procedures, Replacing Disk
Drive.
ii. Repeat steps a and b. (If unsuccessful, go to
step g.)
Replace the Power Supply (the one with the faulty
+12 V dc supply).
i. See Power Supplies, Replacing Power Supply
for Maintenance.
ii. Once the Power Supply replacement is
complete, return to step a and proceed.
iii. If any difficulties arise, proceed immediately
to step g.
Call for technical assistance.
End
cause: printed when:
the Disk Interface is going through
initialization; both disks are found to
contain status data indicating that each
disk should be the only on-line and active
disk.
a new disk is placed into the DPP system and
a CPU switch occurs. (The default is disk
A ONLY mode.)
Reason Code = 27
Corresponds to ERRMAP entry: DISK ER MESSAGE
System Default:
Type: Minor
(continued)
DPP Recovery and Routine Maintenance Guide BCS35 and up
Disk drive procedures 4-47
(continued)
Level: 0