Hitachi HUS154530VLF400 User Manual
Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification
22
Note:
All values are in hex format. An AL_PA value of 0x00 is not valid for an NL_Port. A SEL_ID of 0x7F forces the
drive to obtain a soft address.
7.1.6.3 P_ESI_n Function
The SEL_N (TTL compatible) I/O's (defined when -Parallel ESI is asserted) provide an interface between the enclosure and
the drive. When signals are defined as outputs, they are configured as open-drain drivers with 4mA sink capability.
the drive. When signals are defined as outputs, they are configured as open-drain drivers with 4mA sink capability.
When the drive asserts -Parallel ESI, it goes through a 'discovery' process (see SFF-8067) to determine the level of enclosure
service supported by the backplane. The outcome of the 'discovery' process is that the backplane:
service supported by the backplane. The outcome of the 'discovery' process is that the backplane:
1. Does not support enclosure services or
2. Supports SFF-8045 enclosure services or
3. Supports SFF-8067 enclosure services
2. Supports SFF-8045 enclosure services or
3. Supports SFF-8067 enclosure services
The definition of the signals are summarized in the table below:
8
D9
28
A7
48
67
68
2E
9
D6
29
A6
49
66
69
2D
A
D5
2A
A5
4A
65
6A
2C
B
D4
2B
A3
4B
63
6B
2B
C
D3
2C
9F
4C
5C
6C
2A
D
D2
2D
9E
4D
5A
6D
29
E
D1
2E
9D
4E
59
6E
27
F
CE
2F
9B
4F
56
6F
26
10
CD
30
98
50
55
70
25
11
CC
31
97
51
54
71
23
12
CB
32
90
52
53
72
1F
13
CA
33
8F
53
52
73
1E
14
C9
34
88
54
51
74
1D
15
C7
35
84
55
4E
75
1B
16
C6
36
82
56
4D
76
18
17
C5
37
81
57
4C
77
17
18
C3
38
80
58
4B
78
10
19
BC
39
7C
59
4A
79
F
1A
BA
3A
7A
5A
49
7A
8
1B
B9
3B
79
5B
47
7B
4
1C
B6
3C
76
5C
46
7C
2
1D
B5
3D
75
5D
45
7E
1
1E
B4
3E
74
5E
43
7E
NA
1F
B3
3F
73
5F
3C
7F
-