Quick Reference
AlphaServer 1000A Rackmount Owner’s Guide 9-9
SCSI Port Connector
The external SCSI connector is a 50-pin high-density connector. Table 9–5 lists the pin
assignments.
Table 9–5: SCSI Port Pinouts
Pin
Signal
Pin
Signal
1
GND
26
-DB (0)
2
GND
27
-DB (1)
3
GND
28
-DB (2)
4
GND
29
-DB (3)
5
GND
30
-DB (4)
6
GND
31
-DB (5)
7
GND
32
-DB (6)
8
GND
33
-DB (7)
9
GND
34
-DB (P)
10
GND
35
GND
11
GND
36
GND
12
RESERVED
37
RESERVED
13
OPEN
38
TERMPWR
14
RESERVED
39
RESERVED
15
GND
40
GND
16
GND
41
-ATN
17
GND
42
GND
18
GND
43
-BSY
19
GND
44
-ACK
20
GND
45
-RST
21
GND
46
-MSG
22
GND
47
-SEL
23
GND
48
-CD
24
GND
49
-REQ
25
GND
50
-I/O
