Hitachi HUS154530VLF400 User Manual

  

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

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For Extended Link Service frames, the Header TYPE field is set to 01h (Extended Link Service). R_CTL is either 22h 
(Extended Link Data, Unsolicited Control) for a Request, or 23h (Extended Link Data, Solicited Control) for a Reply. 

The first byte of the payload is the LS_Command and encodes the Request or Reply, as shown in Table 33 and Table 34. 

Table 34 is a comprehensive list of all Extended Link Service commands supported by the drive. 

The code '11h' for the TEST ELS (not supported by the drive) is also used by the LIPxx frames that circulate during Loop Ini-
tialization. To differentiate these from a TEST ELS, the second byte of the payload must be examined and compared with 
Table 35. 

Note: PLDA 1.10 specifies: “Reserved FC-PH fields are not required to be checked for zeroes. Validity bits set to 0 remove 
any requirement to check the corresponding field for zeroes (e.g., if F_CTL bit 3=0, receiving N_Ports are not required to ver-
ify that the parameter field in word 5 of the frame header contains zeroes).” As such, the drive does not validate 1) reserved FC 
fields or 2) fields that are not reserved but are not valid for the current frame (as shown in the example above with F_CTL bit 
3). This does not apply to any reserved field checking and testing within the FCP_CDB. These fields are checked as per ANSI 

Accept LS_ACC 

Link Service Reject 

LS_RJT 

Address Discovery 

ADISC 

Fabric Address Notification

FAN

Fabric Login

FLOGI

Logout LOGO 

Port Discovery 

PDISC 

Port Login 

PLOGI 

Process Login 

PRLI 

Process Logout 

PRLO 

Read Link Status 

RLS 

Report Node Capabilities 

RNC 

Report Node ID

RNID

Re-instate Recovery Qualifier 

RRQ 

Third Party Process Logout 

TPRLO 

Report Port Speed Capabilities

RPSC

Note: Only lists ELSs supported by the drive. Refer to FC-PH for a complete list of ELSs.