You probably need to run fdisk and make sure the other disks are labled and partitioned right. Also does you E450 have the full drive backplane or just the base 4 drive one? All your disks should atleast show up in /dev/dsk as cXtXd0sX where cX = controller # X, tX = target # X, d0 = lun 0, and sX = slice # X. From there you still need to make a filesystem on them and mount them.
Thanks Wolflord, When I do a STOP-A, it shows all eight drives. I also have lights on all eight drives when I open the case. I think I have all the backplanes as the server did come with 18 drives but ten of them were bad.