Northern Telecom DMS-100 Series Maintenance Manual page 131

Procedure 4-46
Disk drive hardware error messages - procedures
1 (log message)
DISK: BUS ERROR (TIME
1
OUT)
AUXILIARY STATUS:
INTERRUPT STATUS:
STAGE: aa
DISK COMMAND:
dd(2) ... dd(n)
DISK JOB:
PARAMETERS: ff gg hh(1)
hh(2) hh(3) kk(1) kk(2)
SIDE z
(w/o 56K polling)
where: Auxiliary Status = xx = contents of the bus
xx,
yy
DRIVE: ee
bb dd(1)
cc,
= ID = Idle
= DT = Data
= R2 = Request2 = ST = Status = MG = Message
= DC = Disconnect
D0 = read prime D1 = seek prime
D3 = write prime D4 = write standby
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
controller Auxiliary Status Register, (in Hex).
Interrupt Status = yy = contents of the bus
Interrupt Status Register, (in Hex).
Stage = aa = a two letter code indicating the
state of the SCSI (Small Computer System
Interface) bus cycle that the system Disk
Interface was in when the error occurred.
= SL = Select = CM = Command
= D2 = Data2 = RQ = Request
Drive = ee = the drive unit number (in Hex)
ranging from 0 to 15, plus the two highest
order bits have special meaning. The 80 bit
ON indicates that a data output was to occur.
This occurs in writes and parameter
assignments. The 40 bit ON indicates that this
message normally would be suppressed, but
the printing of error messages on all tries has
been enabled. Normally, only the last try of
any disk operation generates an error
message.
Disk Command = bb = the first two letters of
DISK COMMAND are a two letter code for the
disk command that was being transferred to or
carried out by the OMTI disk controller.
DMA Register Values = dd(1) dd(2) ... dd(n)
Disk Job = cc
= 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:
D5 = seek prime
D7 = write prime
Formats: FA = A
Relocate track from prime; - used by backup:
Disk drive procedures 4-97
D2 = seek standby
D6 = seek standby
FB = B
L3 = seek standby