Northern Telecom DMS-100 Series Maintenance Manual page 139

Procedure 4-48
Disk drive hardware error messages - procedures
1 (log message) DISK: COM-
MAND ERROR
DISK STATUS:
ERROR CODE:
aa(2) aa(3) aa(4)
DISK JOB:
PARAMETERS:
yy(1) yy(2) yy(3)
zz(1) zz(2)
SIDE d
(w/o 56K polling)
where: Disk Status = cc = status byte returned by the
cc,
aa(1)
bb,
ww xx
D0 = read prime D1 = seek prime
D3 = write prime D4 = write standby
D5 = seek prime D6 = seek standby D7 = write prime
D8 = write standby
L1 = read prime L2 = seek prime
L4 = write prime L5 = write standby
(continued)
DPP Recovery and Routine Maintenance Guide BCS35 and up
bus controller during the status phase of of the
SCSI (Small Computer System Interface) bus
cycle, (in Hex).
Error Code = aa(1) aa(2) aa(3) aa(4) = error
information bytes extracted from the disk
controller by the REQUEST SENSE
command, (in Hex).
for DPP systems with 380-MByte disk drives:
aa(1) = error code with validity bit, indicates the
validity of the sector address. validity
bit = bit #7.
bytes aa(2), aa(3), and aa(4) = sector
addresses
Disk Job = bb
= a two letter code for the disk job in progress.
= CK = check for ready
Directory update after dynamic relocation:
After a directory track has been relocated:
After a data track has been relocated:
Formats: FA = A
Relocate track from prime; - used by backup:
Disk drive procedures 4-105
D2 = seek standby
FB = B
L3 = seek standby