You have a disk enclosure with 14 x 72GB Wide-Ultra2 SCSI hard disks connected. You add an HP2-T16 Exam additional disk enclosure with 8 x 146GB Hot-Pluggable Ultra320 SCSI hard disks to an array…

You have a disk enclosure with 14 x 72GB Wide-Ultra2 SCSI hard disks connected. You add an HP2-T16 Exam additional disk enclosure with 8 x 146GB Hot-Pluggable Ultra320 SCSI hard disks to an array controller. To optimize peformance, you move 3 x 72GB Ultra2 hard disks to a new enclosure to balance the number of hard disks across two channels. The disks in the new enclosure are not working correctly and the disks are not seen in the array controller management tool. There are no conflicting device IDs and termination is correct. All enclosures were pwoered on before powering up the server. What are the possible causes of the problem? (Select two)