Northern Telecom DMS-100 Series Maintenance Manual page 65

Procedure 4-15
Disk condition and disk file error messages - procedures
1
DISK MODE:
2 Alarm Level:
No selected disk mode.
3 Customer-Selected
Alarm Level
4 Other Alarm Indications
5 System Recovery Action
6 Craftsperson Activity
cause: a. response to manual request for current DISK
MODE status and neither disk A or B has been
initialized.
Reason Code = N/A
Corresponds to ERRMAP entry: DISK MODE ALARM
System Default:
Type: Major
Type:
Default:
Status Panel:
Customer-Selected
Status Panel:
None; response to keyboard request, normal on
system restart.
None: normal on system restart. (w/o 56K polling)
a.Switch processors.
i. See Switch and Status Panel Operation,
Figure 7-1 .
ii. If disk activity starts, go to step b.
iii. If no disk activity starts, go to step c.
b.If disk activity starts, a disk mode message should
print.
Examine the printout and proceed as follows:
i. If the disk mode is other than DISK MODE:
NONE (that is, AP, BP, AO, or BO), replace the
Disk Interface PCA in slot 11 in the standby
chassis. See Printed Circuit Assembly
Replacement in 297-1001-536: DPP Card
Replacement .
ii. After changing Disk Interface PCA, switch
processors. If disk mode is still NONE, go to
step iv
(continued)
DPP Recovery and Routine Maintenance Guide BCS35 and up
Disk drive procedures 4-31
Level: 0
Level:
Audible:
Audible: