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When the specifications in the "Logical block address" field and "Transfer block
count" field in the CDB exceed the maximum logical block address in the IDD,
that command is terminated with a CHECK CONDITION status (ILLEGAL
REQUEST [=5] / Logical block address out of range [=21-00]) and writing of data
to the disk media is not executed.
If the write cache function is enabled, the IDD reports a status byte at the point
when reception of all the data transferred from the INIT is completed. If an error
occurs while data are being written to the disk media, a CHECK CONDITION
status is reported for the command to be executed next. If the write cache
function is disabled, a status byte is reported after writing to the disk media of all
the data transferred from the INIT is completed, then execution of the command is
terminated.
Even when there is an error in the specification in the CDB, or
when a write operation to the disk media cannot be executed
normally due to various other causes, the transfer of data (data is
pre-fetched to the data buffer) from the INIT to the IDD may be
executed. In this case, the length of data transferred from the INIT
to the IDD is undefined. Also, all the data transferred to the IDD
will not necessarily be actually written to the disk media. However,
if the command is terminated with a CHECK CONDITION status
and the sense key of the sense data indicates "ILLEGAL REQUEST
[=5]," the data from that command is not written to the disk media
by a write operation.
C141-C009
4.2 Data Access Commands
4-139
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