Messages 25
Messages
This chapter includes all SCSI messages, both supported and unsupported.
Parts of this chapter come from Section 5, Logical Characteristics, of the SCSI
standards (see page 13).
The message system provides an initiator and a target on the SCSI bus with a
means of managing communication. The available messages are listed in this
chapter.
Message Out Support (Parallel SCSI only)
Name Code Support
Abort 06h An abort condition is generated (see “Abort Handling” on page 16).
Bus Device Reset 0Ch A reset condition is generated (see “Reset Strategy” on page 15).
Extended Message 01h See “Extended Message Support” below.
Identify 80h+ The Identify Out message is sent by the initiator to identify the Logical Unit
to be accessed and to set Disconnect Privilege.
Initiator Detected
Error
05h The initiator has detected an error in the data being sent in a Command,
Data or Status phase. The drive will send a restore data pointers message
to retry the data transfer. (See “Message In Support (Parallel SCSI only)”
below for details).
If the message is received immediately after an Identify message or after
the Command Complete message has been sent, the drive will go Bus
Free.
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