SCSI is not supported on modern servers. I believe you meant SAS (Serial-Attached SCSI). Which holes were used to mount the drive in the carrier? Use the holes that put the drive CLOSEST to the backplane.
I've been looking for the better part of 3 hours trying to figure out how to add just a simple stand alone SCSI drive to my system.  Currently have 2 500GB drives in Raid 1 - and want to leave it that way.  Can't I simply plug in a disk or two into the open bays on the front,  hit CTRL-R and enter the S110 setup screen and set up virtual disks?   Seems that easy,  except the physical disks don't show up for me to create virtual disks.  I know I'm missing something here... This is what I purchased for this purpose :  Even when I boot the server,  I don't even get a green light blink on the new drive - like it doesn't even get power.    I would really like to add 2 drives and make an additional Raid 1 setup,  but again,  it seems like the hard drives aren't even powering up. Any ideas ?
Poweredge T620 add stand-alone disk