According to SAM4r13b 5.8.7 2nd instance of 'a', an INQUIRY should not report a Unit Attention; what about an INQUIRY given via PERFORM SCSI COMMAND? My guess is that it should report a Unit Attention (if pending) because the PERFORM SCSI COMMAND fits into the category of "If a command other than INQUIRY ..." (see SAM4r13b 5.8.7 2nd instance of 'e').