Northern Telecom DMS-100 Series Maintenance Manual page 127

Procedure 4-45
Disk drive hardware error messages - procedures
(continued)
Drive = bb = 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 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.
dd(N):
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.
Disk Job = ee
= 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:
D0 = read prime D1 = seek prime
D3 = write prime D4 = write standby
After a data track has been relocated:
D5 = seek prime D6 = seek standby D7 = write prime
D8 = write standby
Formats: FA = A
Relocate track from prime; - used by backup:
L1 = read prime L2 = seek prime
L4 = write prime L5 = write standby
Assign disk parameters.:
PA = To A
Reads:
From prime:
Relocate track from standby (if standby
succeeded)
R3 = read standby R4 = seek prime R5 = seek standby
R6 = write prime R7 = write standby
Backup track - used by backup:
T1 = seek prime T2 = seek standby T3 = read prime
T4 = write standby
(continued)
DPP Recovery and Routine Maintenance Guide BCS35 and up
Disk drive procedures 4-93
Disk Command = cc = cc dd(1) dd(2) ...
D2 = seek standby
FB = B
L3 = seek standby
PB = To B RC = recalibrate
RA = from A RB = from B
R1 = read prime R2 = read standby
(if read prime failed)