Northern Telecom DMS-100 Series Maintenance Manual page 113

Procedure 4-39
Disk drive hardware error messages - procedures
1 ****** DISK ALARM x
2 Alarm Level:
disk mode switch
3 Customer-Selected
Alarm Level
4 Other Alarm Indications
5 System Recovery Action
6 Craftsperson Activity
where: x = disk drive
= A = disk drive A
= B = disk drive B
cause: message is printed to report that an alarm
threshold value has been exceeded. Output for
the following reasons:
a.five consecutive non-recoverable disk errors
on one side (A or B).
b.three failed retries at resetting the SCSI
(Small Computer System Interface) bus
and reassigning disk parameters to the
OMTI disk controller after a disk bus error.
c.a non-recoverable disk error while the Disk
Interface is retrieving data for initialization
from a disk that had good status.
d.five failed retries at updating sector zero on
the same side.
Reason Code = 27
Corresponds to ERRMAP entry: DISK WRITE FAIL
System Default:
Type: Critical
Type:
Default:
Status Panel: Critical
Customer-Selected
Status Panel:
Disk mode goes to non-redundant (one disk is now in
ONLY mode).
a.Reinitialize the disk.
(continued)
DPP Recovery and Routine Maintenance Guide BCS35 and up
Disk drive procedures 4-79
DISK ERROR ALARM
Level: 0
Level:
Audible: Critical
Audible: