Nortel DMS-100 Series Manual page 145

Disk Crossover and Disk Controller circuit packs (NT6M72xx and 680-9143) 13-11
Table 13-2
Disk Controller circuit pack (A21A1 and B21A1) options - part number: 680-9143
Device type
(number)
Jumper
(W0) 0
1
2
3
4
5
6
7
Jumper 1
(W1)
2
Jumper
(W2)
Jumper
(W3)
(W4)
Jumper
(W5)
(W6)
(W7)
(W8)
Strap
DIP Switch
Rotary Switch
Switch
Note 9: There are no customer-definable options on this circuit pack. Information is for reference only.
Use this data for verification during initial DPP system installation and/or circuit pack replacement to
make sure the replacement circuit pack is set up the same as the circuit pack being replaced.
Note 10: Only present on the 72-Mbyte and 140-Mbyte disk drives.
Position/setting
State Pri.
shorted; I.D. = 0
shorted; I.D. = 1
shorted; I.D. = 2
shorted; I.D. = 3
shorted; I.D. = 4
shorted; I.D. = 5
shorted; I.D. = 6
shorted; I.D. = 7
- 2 = parity enabled
- 3 = parity disabled
Not used
W3 W4 Bytes Per
Sector
open open 128
short open 256
open short 512
short short 1024
Function established in the cop-
per tracings; do not modify
None used
None used
None used
None used
DPP Hardware Component Replacement Guide DPP001 and up
Function
SCSI Controller ID. De-
fines the SCSI device
priority. ID 7 is the high-
est priority in a multi-
controller configuration.
Host Parity
Select disk drive
Sector Size
Logical Unit Number As-
signment.
Setting
Factory On-site
Must be
0 the same
as the
factory
setting.
Must be
1-2 the same
as the
factory
setting.
Must be
W3 the same
open as the
W4 factory
short setting.
Must be
Out the same
Out as the
Out factory
Out setting.