Hitachi ULTRASTAR 15K450 HUS154530VLF400 - Manual (Page 88)

Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification
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17.3.5 Fabric Login (FLOGI)
FLOGI is used by the drive to register its Service Parameters with the Fabric assuming the drive exists on a Public Loop (i.e.
the loop contains an FL_Port). Once the drive has completed FLOGI, it is then permitted to use the local FL_Port as a gateway,
allowing it to communicate with other N_Ports and NL_Ports attached to the fabric. (See 21.5, “Public Loop Operation” on
page 312.)
The drive performs a FLOGI by opening a full duplex connection to FL_Port located at AL_PA 00h and sending a FLOGI
request to the well-known address of FFFFFEh. The FL-Port responds to a valid request with a FLOGI Accept frame that con-
tains the FL_Port’s operating parameters. The D-ID field of the FLOGI Accept frame contains the fabric assigned Domain,
Area, and the AL-PA of the drive performing the FLOGI. The drive uses this address in all further communication with other
N_Ports and Public NL_Ports. The drive will not perform a FLOGI if the drive fails to detect an FL_Port during Loop-Initial-
ization.
Table 46: FLOGI_REQ/FLOGI_ACC payload
Byte Item Size (Bytes)
0-3 Request = 0400 0000h; Accept = 0200 0000h 4
4
-
19
Common Service Parameters 16
20
-
27
Port Name 8
28
-
35
Node Name 8
36
-
51
Class 1 Service Parameters 16
52
-
67
Class 2 Service Parameters 16
68
-
83
Class 3 Service Parameters 16
84
-
99
Reserved 16
100
-
115
Vendor Version Level 16