Fujitsu MBA3073 SERIES Technical Manual page 195

(2) COMMAND phase parity error
When the HDD detects a parity error in the COMMAND phase, it retries the Command Phase up
to 3 times. If the HDD fails to recover a parity error, it proceeds to the next procedure.
If the LUN is already identified by the IDENTIFY message, the HDD terminates the command
with the CHECK CONDITION status. The sense key/sense code of the sense data indicates the
"ABORTED COMMAND [=B]/SCSI parity error [=47-00]."
If the LUN is not identified, the HDD does not generate the sense data and enters the BUS FREE
phase immediately.
(3) DATA OUT phase parity error
When the HDD detects a parity error of SCSI bus in the DATA OUT phase, it does not make retry
and proceeds to the next procedure.
The HDD terminates the currently executing command with the CHECK CONDITION status.
The sense key/sense code of the sense data indicates the "ABORTED COMMAND [=B]/SCSI
parity error [=47-00]."
(4) Receiving a INITIATOR DETECTED ERROR message
When the HDD receives an INITIATOR DETECTED ERROR message from the INIT, except for
the Data Phase and the Message Out Phase, it retries the previous phase up to 3 times. If the
recovery sequence is failed or not done, the HDD proceeds to the next procedure.
If the LUN is already identified, the HDD terminates the currently executing command with the
CHECK CONDITION status.
"ABORTED COMMAND [=B]/INITIATOR DETECTED ERROR message received [=48-00]."
If the LUN is not identified yet, the HDD does not generate the sense data and enters the BUS
FREE phase immediately. If the STATUS phase has already completed, the HDD also enters the
BUS FREE phase but does not send the status again.
(5) Receiving a MESSAGE PARITY ERROR message
If the HDD receives a MESSAGE PARITY ERROR message from the INIT as its response to the
ATTENTION condition (MESSAGE OUT phase) generated at the MESSAGE IN phase execution,
the HDD recognizes that there was a parity error in the previous MESSAGE IN phase. Then the
HDD performs the error recovery procedure based on the SCSI Bus protocol for the previous
MESSAGE IN phase up to 3 times. If the retry fails, the HDD enters the BUS FREE phase
immediately and terminates the executing command abnormally. The HDD does not report the
command completion (that is, the HDD does not send the status and TASK COMPLETE message)
of that command. If the LUN is identified before the error occurrence, the HDD generates the sense
data which indicates the "ABORTED COMMAND [=B]/SCSI parity error [=47-00]" sense
key/sense code. If the LUN is not identified, no sense data is generated.
If the HDD receives a MESSAGE PARITY ERROR message from the INIT as its response to that
ATTENTION condition generated at execution of other than the MESSAGE IN phase, the HDD
enters the STATUS phase immediately. If the LUN is identified before the error occurrence, the
HDD generates the sense data which indicates the "ABORTED COMMAND [=B]/Invalid
message error [=49-00]" sense key/sense code.
188
The sense key/sense code of the sense data indicates the
C141-C015