Seagate Fibre Channel Interface - Manual (Page 385)

Fibre Channel Interface Manual, Rev. D 371
Exchange Status Block
A logical construct which contains the state of an exchange. An originator N_Port has an Originator Exchange
Status Block and the responder N_Port has a Responder Exchange Status Block for each concurrently active
Exchange.
Exchange_Identifier (X_ID)
A generic reference to OX_ID and RX_ID (see Exchange).
Exclusive connection
A Class 1 dedicated connection without Intermix (see dedicated connection).
Execute command service
A peer-to-peer, confirmed service requested by the application client to perform a SCSI command.
Extinction ratio
The ratio (in dB) of the average optical energy in a logic one level to the average optical energy in a logic zero
level measured under modulated conditions at the specified baud rate.
Eye opening
The time interval across the eye, measured at the 50% normalized eye amplitude which is error free to the
specified BER.
F_BSY
Fabric_Port_Busy.
F_BSY(DF)
F_BSY response to a data frame.
F_BSY(LC)
F_BSY response to any link control except P-BSY.
F_CTL
Frame_Control.
F_Port
The Link_Control_Facility within the fabric which attaches to an N_Port through a link. An F_Port is address-
able by the N_Port attached to it, with a common well known address identifier (hex “FFFFFE”) (see local
F_Port, and remote F_Port).
F_Port
Fabric_Port.
F_Port Name
A Name_Identifier associated with an F_Port.
F_RJT
Fabric_Port_Reject.