Hitachi HUS154530VLF400 User Manual
Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification
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18.2 Information Units
SCSI-FCP defines a number of IUs that are used to describe the mapping of SAM Device and Task Management functions.
The Disk Profile defines an 'FCP Feature Set', which is a subset of those IUs.
The Disk Profile defines an 'FCP Feature Set', which is a subset of those IUs.
This section defines the IUs implemented by the drive (see Table 88).
Table 88: Information Units (IUs)
IU SAM
primitive
Data
block
F/M/L
SI
M/O
CAT Content
T1 Command
Request 6
FCP_CMND
F T M
T6
Data Out action
1
FCP_DATA
M
T
M
I1
Data delivery request
5
FCP_XFER_RDY (WRITE)
M
T
M
I3 Data
In
action 1
FCP_DATA
M H M
I4 Response 7
FCP_RSP
L
T
M
Note:
Key:
SAM = SCSI-3 Access Method
IU = Information Unit
CAT = Information category of Device_Data frame
F/M/L = First/Middle/Last IU of Sequence
SI = Sequence Initiative
H = Hold Sequence Initiative
T = Transfer Sequence Initiative
M/O = Mandatory/Optional