Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification
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Table 41:Common Service Parameter applicability (part 2 of 2)
"y" indicates yes, applicable (i.e. has meaning)
"n" indicates no, not applicable (i.e. has no meaning)
* The Class 1 Service Parameters shall be used for Class 6. Each has the same applicability as Class 1.
** E_D_TOV resolution and the corresponding value are only meaningful in a point-to-point topology and when doing
PLOGI with an NL_Port on the same loop.
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 shown in Table42.
Table 42:FC-PH Version
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 returns 0 (zero) in this field; i.e., every Initiator is given a Login BB_Credit of 0.
The Common Features field contains flags.
• CIO - Continuously Increasing Offset
When set to one, this flag indicates that the Port supports Continuously Increasing Relative Offset within a Sequence
on a frame by frame SEQ_CNT basis. The Relative Offset is only present if bit 3 of the F_CTL field in the frame
header is set to 1b. The drive requires that an initiator support Continuously Increasing Relative Offset. If this field is
Service parameter Word Bits
PLOGI and
PLOGI LS_ACC
Parameter
applicability
FLOGI
Parameter
applicability
FLOGI LS_ACC
Parameter
applicability
Class Class Class
1*2341*2341*234
BB_SC_N 2 15-12yyynyyynyyyn
Buffer-to-Buffer Receive Data Field Size 2 11-0 yyyyyyyyyyyy
Nx_Port Total Concurrent Sequences 3 31-16 yyyynnnnnnnn
Relative offset by Info Category 3 15-0 yyyynnnnnnny
R_A_TOV 3 31-0nnnnnnnnyyyy
E_D_TOV Value 4 31-0 y
** y
** y
** y
** nnnnyyyy
Hex value Version
00 None
06 FC-PH 4.0
07 FC-PH 4.1
08 FC-PH 4.2
09 FC-PH 4.3
10h FC-PH-2
20h FC-PH-3
Others Reserved