It's likely that is the correct device, but check the output of dmesg, or your /var/log/messages when you plug it in. You should see something like:
Code:
kernel: Vendor: BELKIN Model: USB 2 HS-SD/MMC Rev: 1.29
kernel: Type: Direct-Access ANSI SCSI revision: 00
kernel: SCSI device sdd: 28800 512-byte hdwr sectors (15
MB)
kernel: sdd: Write Protect is off
kernel: sdd: assuming drive cache: write through
kernel: SCSI device sdd: 28800 512-byte hdwr sectors (15
MB)
kernel: sdd: Write Protect is off
In the above example, the device is at /dev/sdd. If you are not seeing this, then either you are not current on your maintenance (as root: yum -y update), or your enclosure chipset is incompatible.