Hitachi HUS154530VLF400 User Manual

  

 Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification

66

"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 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 returns 0 (zero) in this field; i.e., every Initiator is given a Login BB_Credit of 0. 

The Common Features field contains flags. 

 

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 

BB_SC_N

2

15-12

y

y

y

n

y

y

y

n

y

y

y

n

Buffer-to-Buffer Receive Data Field Size

2

11-0

y

y

y

y

y

y

y

y

y

y

y

y

Nx_Port  Total  Concurrent  Sequences

3

31-16

y

y

y

y

n

n

n

n

n

n

n

n

Relative  offset  by  Info  Category

3

15-0

y

y

y

y

n

n

n

n

n

n

n

y

R_A_TOV

3

31-0

n

n

n

n

n

n

n

n

y

y

y

y

E_D_TOV Value

4

31-0

y

**

y

**

y

**

y

**

n

n

n

n

y

y

y

y

None 

FC-PH 4.0 

FC-PH 4.1 

FC-PH 4.2 

FC-PH 4.3 

FC-PH-2 

FC-PH-3 

Reserved