Initio INI-9100UW user manual 13-2, Definitions of Terms

Definitions of Terms

active I/O An I/O process that is presently in execution (not queued). process

byte:This term indicates an 8-bit construct

connection An initial connection or reconnection. A connection can only occur between one initiator and one target.

current I/O The I/O process that is presently connected on the SCSI bus. process

disconnect The action that occurs when an SCSI device releases control of the SCSI bus, allowing it to go to the BUS FREE phase

host adapter A device which connects between a host system and the SCSI bus. The device usually performs the lower layers of the SCSI protocol and normally operates in the initiator role. This function may be integrated into the host system.

initiator A SCSI device that requests an I/O process to be performed by another SCSI device (a target).

I/O process An I/O process consists of one initial connection and zero or more reconnections, all pertaining to a single command or a

group of linked commands. More specifically, the connection(s) pertain to a nexus in which zero or more command descriptor blocks are transferred. An I/O process begins with the establishment of a nexus. An I/O process normally ends with the BUS FREE phase following successful transfer of a COMMAND COMPLETE or a RELEASE RECOVERY message. An I/O process also ends with the BUS FREE phase following an ABORT, ABORT TAG, BUS DEVICE RESET, CLEAR QUEUE message, or a hard

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