Applies to ONTAP 9 Solaris Answer When a LUN has already been SCSI reserved, sending a SCSI Test Unit Ready (TUR) or Mode Sense command from another host will return a "reservation conflict" status. A...Applies to ONTAP 9 Solaris Answer When a LUN has already been SCSI reserved, sending a SCSI Test Unit Ready (TUR) or Mode Sense command from another host will return a "reservation conflict" status. Additional Information What are SCSI Reservations and SCSI Persistent Reservations?