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Fibre Channel Interface Manual, Rev. D 73
Data Overlay Allow
Not supported by the drive. The Data Overlay Allowed bit is not checked.
Data/Response Mix Allowed
1 Allows the drive to send the FCP RSP in the same sequence as the data. The drive does not support the Data/
Response Mix. It will accept a PRLI with the Allow bit set, but will return zero (0) in the accept to indicate the function
cannot be used.
Establish Image Pair
1 The drive establishes a SCSI login for the initiator.
0 The PRLI is only an inquiry of the drive’s support of the process. The accept is still returned, but the login is not
retained.
Initiator Function
Must be set to one (1) for the drive to accept the login request.
LS Command Code (Link Services Command Code)
20h PRLI Payload.
Orig Proc Assc Valid (Originator Process Associator Valid)
Not supported by the drive. Not checked by the drive.
Page Length
Length of the service parameter page (in bytes). For a SCSI FCP service page, the length is 10h.
Payload Length
Length of PRLI payload (in bytes). The count includes the LS Command Code. The drive supports one service parameter
page per PRLI.
The Payload Length must be 14h (20 decimal).
RD XFR RDY Disable (Read Transfer Ready Disable)
1 FCP_XFR_RDY will not be sent before read data. The drive requires this bit to be set to one (1).
Resp Proc Assc Valid (Responder Process Associator Valid)
Not supported by the drive. Not checked by the drive.
Target Function
May be set in addition to the Initiator Function bit. The drive does not check this bit.
Type Code
08h SCSI FCP process as included in the frame header for FCP frames.
Type Code Extension
0 Not defined for SCSI FCP and must be set to zero (0).
WR XFR RDY Disable (Write Transfer Ready Disable)
0 The drive requires this bit to be set to zero (0). The drive also requires the use of the WR_XFR_RDY bit.
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