IBM DDRS-39130 - Ultrastar 9.1 GB Hard Drive

9.4.1 Unexpected BUS FREE Phase Error Condition
There are several error conditions that will cause the file to immediately change to the BUS FREE phase,
regardless of the state of the ATN signal. The file will not attempt to reconnect to the initiator to complete
the operation that was in progress when the error condition was detected. The initiator should interpret this
as a catastrophic error condition.
If the LUN was identified by the file prior to the error condition, then the file will abort the active command
for this initiator/LUN and generate sense data for this initiator/LUN to describe the cause of the catastrophic
error. The initiator may retrieve this sense data by issuing a REQUEST SENSE command to this LUN.
Note however, that the REQUEST SENSE command may fail if the catastrophic error condition persists.
If the LUN was not identified by the file prior to the error condition, then the file will not affect the sense
data or the operation of any currently executing command for this initiator or any other initiator.
9.4.2 MESSAGE OUT Phase Parity Error
The file will, depending on the model
7
, optionally retry the message phase and if it still fails abort the current
command with CHECK CONDITION status and sense data of ABORTED COMMAND / SCSI
PARITY ERROR .
9.4.3 MESSAGE IN Phase Parity Error (Message Parity Error)
The file will, depending on the model
7
, optionally retry the message phase and if it still fails abort the current
command, go to bus free, setting sense data of ABORTED COMMAND / SCSI PARITY ERROR .
9.4.4 COMMAND Phase Parity Error
The file will, depending on the model
7
, optionally retry the command phase after sending a restore pointers
message. If it still fails it will abort the current command with CHECK CONDITION status and sense data
of ABORTED COMMAND / SCSI PARITY ERROR .
9.4.5 DATA OUT Phase Parity Error
If the file detects a parity error during DATA OUT phase, the file will abort the current command with
CHECK CONDITION status and sense data of ABORTED COMMAND / SCSI PARITY ERROR.
7
The action for a particular file model is defined in the interface spec addendum for each model.
176 OEM Spec. of DDRS-3xxxx