Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification
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The Common Service Parameters apply to all classes of service and are exchanged during Login.
Table 47:Common Service Parameters (FLOGI_REQ/FLOGI_ACC)
The upper byte of the FC-PH Version field indicates the highest version of FC-PH that is supported and the lower byte indi-
cates the lowest. The code/version relationship is given by Table 42.
The BB_Credit field indicates the number of frame buffers that a port guarantees to have immediately available when a loop
circuit is opened. The drive sets this field to 0 (zero); i.e., the drive grants the FL_Port a Login BB_Credit of 0.
The Common Features field contains the following flags:
• V V- Val id Ve ndo r Ve rsi on L eve l
When set to one, this flag indicates that the Vendor Version Level field in the frame payload contains valid informa-
tion. The drive sets this field to 0b.
• N/F Port - N_Port/F_Port
When set to one, this flag indicates that the Port is an F_Port. When set to zero, it is an N_Port. The drive checks this
field in the FLOGI_ACC and will revert to PLDA behavior if it is not set to one. The drive sets this field to 0b.
Byte BIT Default
Request
Valu es
76543210
4 PH Version - Highest Supported 20h
5PH Version - Lowest Supported 20h
6
7
(MSB) Buffer-to-Buffer Credit
(LSB)
00h
00h
8Reserved VV N/F Port ABCM Reserved 00h
9Reserved DHD Reserved PL 00h
10
11
(MSB) BB Received Data Field Size
(LSB)
08h
00h
12
13
14
15
(MSB)
FLOGI_REQ = Reserved; FLOGI_ACC = R_A_TOV
(LSB)
00h
00h
00h
00h
16
17
18
19
(MSB)
FLOGI_REQ = Reserved; FLOGI_ACC = E_D_TOV
(LSB)
00h
00h
00h
00h