Exabyte EXB-8205 Instruções de Operação descarregar pdf (Página 392)

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Message Processing in the Message Out Phase

Figure D-2 shows the message sequences for Message Out bytes

received during a previously initiated Message Out phase. Note that

Message Reject and Initiator Detected Error messages received after a

previous Message Out phase are treated as catastrophic errors

committed by the initiator.

Parity Error in the Message Out Phase

When parity checking is enabled and the CTS detects a parity error in

a message received from the initiator, the CTS requests that the

initiator reissue the message by going to the Message Out phase again.

If a parity error occurs during the first message sequence (Identify

message followed by contiguous Message Out bytes), the entire

sequence must be retransmitted (that is, the initiator should reissue

the Identify message and all following bytes). If a parity error is

detected the second time the message is received, the CTS goes to the

Bus Free phase by releasing the BSY signal.

D-6

EXB-8205 and EXB-8505

(Standard and XL)

510503

Appendix D SCSI Bus Message Processing and Error Recovery

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