Seagate Fibre Channel Interface - Manual (Page 153)

Fibre Channel Interface Manual, Rev. D 139
SEQ_ID (Sequence Identifier)
For transfers to the drive, the drive captures the SEQ_ID from the first frame of the sequence and requires all subsequent
frames of the sequence to have the same SEQ_ID. For transfers to the initiator, the drive sets the SEQ_ID to 00h for the
first data sequence of a command (exchange). The SEQ_ID is sequentially increased for additional data sequences, if
required, for the command.
S_ID (Source Identifier)
The address of the initiator originating the command if transfer is data to the drive and the address of the drive if the trans-
fer is from the drive.
Type
08h
For all SCSI FCP frames.
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