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1.6
Sense Data Hold State
1.6.1
Sense Data Hold Condition
The IDD generates sense data if any of the following conditions occurs and enters the sense
data hold state until the conditions for cancellation, described in item 1.6.2, are established.
The sense data which are generated, are held for each individual INIT that issued the
applicable command. The sense data hold state is also maintained individually for each INIT
which is their object.
1) If the IDD reports a CHECK CONDITION status, sense data are generated for the
command that was terminated by the CHECK CONDITION status.
2) If a fatal error occurs on the SCSI bus and the IDD forcibly enters the BUS FREE phase,
sense data are generated for the command that was being executed on the SCSI bus.
However, if the LUN cannot be specified by the point when the error occurs, the IDD does
not generate sense data.
3) Since it is impossible for reconnection processing to be executed without a response from
the INIT in the RESELECTION phase, if the IDD clears the command that is necessary for
reconnection processing, sense data are generated for that command.
Notes:
1.
In the case of 3) on the previous page, the IDD does not clearly inform the INIT of the
occurrence of an error, but terminates the command abnormally and enters the sense
data hold state. If a long period of time passes with no response from the IDD, the
INIT that issued the command should issue a REQUEST SENSE command and
confirm the content of the error.
2.
If the INIT which is the object of holding of sense data cannot be specified because
the INIT's SCSI ID was not notified in the SELECTION phase, the INIT enters an
unspecified special sense data hold state. In this case, the IDD regards this as the
INIT that is the object of holding of the sense data starting a new SELECTION phase
in which the INIT's SCSI ID is not notified.
C141-E039-01EN
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