Message In
Table113. Supported Inbound Messages
Name Code Support
Command Complete 00h Thismessage is sent by the drive at the end of the Status
phase to indicate that a command is complete. Once the
message is sent, the drive releases the bus and goes to
Bus Free.
Disconnect 04h This message is sent by the drive to indicate that it is
about to disconnect from the bus and go to Bus Free.
During a Data phase, it is always preceded by a Save
Data Pointers message. If a Message Reject message is
received in response to this message, then the disconnect
is prevented.
Extended Message 01h See “Extended Messages”on page 100 for extended
message support.
Identify 80h+ The Identify In message is sent to the initiator during
reconnect to indicate which Logical Unit is reconnecting.
The Disconnect Privilege and LUNTAR flags are both
clear.
Ignore Wide Residue 23 This message is sent by the drive to the initiator to
indicate that a byte on a wide bus is not valid. This is
supported whenever a wide transfer is active.
Message Reject 07h This message is sent to the initiator when the message
received by the drive is unsupported or inappropriate.
Restore Pointers 03h This message causes the initiator to reset its data transfer
pointers to the values they held when the last Save Data
Pointers message was sent. It is sent when a parity error
is detected on the bus or when an Initiator Detected Error
message is received in order to retry the Data phase.
Save Data Pointers 02h This message instructs the initiator to save its current data
transfer pointers for use with a subsequent Restore
pointers message. This message is always sent before a
Disconnect message during Data phases.
Chapter 5. Attachment Features 99