Hitachi ULTRASTAR 15K450 HUS154530VLF400 - Manual (Page 109)

Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification
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The Node Identification Data Format specifies the format of Node Identification Data returned from the drive. The drive
sets this field to the same value that was in the RNID Request.
The Common Node-Identification-Data Length specifies the length of the Common Node-Identification-Data. This field is
set to 10h.
The Specific Node-Identification-Data Length specifies the length of the Specific Node-Identification-Data. This field is set
to 34h if the Node Identification Data Format was set to DFh (Topology Discovery Data) or 0h otherwise.
Common Node-Identification-Data specifies the port’s 8-byte Node_Name and 8-byte Port_Name. The format is defined in
Table 75: “Common Node Identification Data” .
Table 75: Common Node Identification Data
The Specific Node-Identification-Data specifies Topology Discovery Data whose format is described in Table 76: “Topol-
ogy Discovery Specific Node Identification Data” . This Data is only returned when the Node Identification Data Format is
set to DFh "Topology Discovery Data".
Table 76: Topology Discovery Specific Node Identification Data
The Global ID field is a World Wide unique name whose format is identical to the Common Node-Identification-Data field as
specified in the table.
The Unit Type field specifies the type of device returning the Node-Identification-Data. Valid values for this field are shown
in Table 77: “Topology Discovery Unit Type” .
Format Size (Bytes)
N_Port_Name 8
Node_Name 8
Format Size (Bytes)
Global ID 16
Unit Type 4
Physical Port Number 4
Number of Attached Nodes 4
IP Version 2
UDP Port Number 2
IP Address 16
Reserved 2
Topology Discovery Flags 2