Hitachi HUS154530VLF400 User Manual

                                    

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

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DTFD (Disable Target Fabric Discovery) bit of one indicates that a Target attached by an FC-AL loop shall not rec-

ognize the presence of a fabric loop port, FL_Port, on the loop. The Target shall perform only the private loop func-
tions defined for Targets defined by FC-PLDA. When DTFD bit is zero, the Target attached by an FC-AL loop shall 
discover FL_Port if present on the loop and perform the public loop functions defined for Targets by FC-FLA. 

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PLPB (Prevent Loop Port Bypass) bit of one specifies that the Target ignores all LPB (Loop Port Bypass) and LPE 

(Loop Port Enable) primitive sequences. The Target’s ports always remain in participating mode. A PLPB bit of zero 
specifies that the Target allow LPB and LPE primitive sequences to control its port bypass circuitry. 

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DDIS (Disable Discovery) bit of one specifies the Target does not require receipt of Address or Port Discovery in 

order to resume tasks following loop initialization. When DDIS is zero, the Target will only resume tasks for an Initi-
ator on receipt of an Address or Port Discovery from that Initiator. 

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DLM (Disable Loop Master) bit of one specifies the Target does not become loop master during loop initialization. 

When DLM is zero, the Target may become loop master. 

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RHA (Require Hard Address) bit of one indicates that a Target attached to an FC-AL loop shall only attempt to 

obtain its hard address available in the SCA-2 SFF-8067 connector or device address jumpers during loop initializa-
tion. The Target shall not attempt to obtain an address during the LISA phase of initialization. If there is a conflict for 
the hard address selection during loop initialization or the Target does not have a valid hard address available, the 
Target shall enter the non-participating state. If the Target detects loop initialization while in the non-participating 
state, the Target shall again attempt to get its hard address. If the hard address has not changed from the address 
obtained in a previous successful loop initialization, the Target shall attempt to obtain the address in the LIFA phase 
if a valid Fabric login exists or LIPA phase of loop initialization. If the hard address has changed, the Target shall 
attempt to obtain the new address in the LIHA phase. When the RHA bit is zero, the Target follows the normal initial-
ization procedure, including the possibility of obtaining a soft address during the loop initialization process. 

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ALWLI (Allow Login Without Loop Initialization) bit of one specifies the Target uses its hard address to accept log-

ins without verifying the address with loop initialization. When ALWLI is zero, the Target is required to obtain an 
address via the loop initialization procedure before accepting a login. 

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DTIPE (Disable Target Initiated Port Enable) bit of one specifies the Target waits for a Loop Port Enable primitive 

with its own hard address before inserting itself onto the loop. When DTIPE is zero, the Target inserts itself onto the 
loop without waiting for a Loop Port Enable primitive.