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MS-9156 ATX Server Board
Ultra320 SCSI Connector: SCSI 1 (Optional)
SCSI (Small Computer System Interface) is a parallel interface standard
for attaching peripheral devices to computers. Ultra320 SCSI is the seventh
generation of SCSI I/O technology, and has a maximum data rate speed of 320
MB/sec. SCSI's commitment to backward compatibility and legacy support are
the primary reasons for its durability as an I/O interface, making SCSI the indus-
try standard for disk drive connection in virtually all high-performance servers.
SCSI LED Connector: J10/JSCSI (Optional)
This connector is used to connect to a LED for showing the activity of
SCSI devices attached to SCSI 1 connector.
34
68
J10/JSCSI
1
MSI Reminds You...
SCSI LED connects to JFP1
HDD LED (storage LED) pins.
The J10/JSCSI is used to con-
nect SCSI card LED signal.
2-22
SCSI 1
1
35
Pin Definition
PIN
SIGNAL
1
VCC5
2
SCSI LED
3
HDD LED
4
VCC5
68-Pin Ultra320 SCSI Connector
Pin
Description
Pin
1
+DB(12)
35
2
+DB(13)
36
3
+DB(14)
37
4
+DB(15)
38
5
+DB(P1)
39
6
+DB(0)
40
7
+DB(1)
41
8
+DB(2)
42
9
+DB(3)
43
10
+DB(4)
44
1 1
+DB(5)
45
12
+DB(6)
46
13
+DB(7)
47
14
+DB(P)
48
15
GROUND
49
16
DIFFSENS
50
17
TERMPWR
51
18
TERMPWR
52
19
RESERVED
53
20
GROUND
54
21
+ATN
55
22
GROUND
56
23
+BSY
57
24
+ACK
58
25
+RST
59
26
+MSG
60
27
+SEL
61
28
+C/D
62
29
+REQ
63
30
+I/O
64
31
+DB(8)
65
32
+DB(9)
66
33
+DB(10)
67
34
+DB(11)
68
Description
-DB(12)
-DB(13)
-DB(14)
-DB(15)
-DB(P1)
-DB(0)
-DB(1)
-DB(2)
-DB(3)
-DB(4)
-DB(5)
-DB(6)
-DB(7)
-DB(P)
GROUND
GROUND
TERMPWR
TERMPWR
RESERVED
GROUND
-ATN
GROUND
-BSY
-ACK
-RST
-MST
-SEL
-C/D
-REQ
-I/O
-DB(8)
-DB(9)
-DB(10)
-DB(11)
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