Hard drive:

320GB, 7.2K rpm, SATA 6.0 Gb/s, SMART IV, 2.5 in
500GB, 7.2K rpm, SATA 6.0 Gb/s, SMART IV, 2.5 in
500GB, 7200 rpm, SATA 6.0 Gb/s, SMART IV, 3.5 in
500GB, 10K rpm, SATA, 6.0 Gb/s, SMART IV, 3.5 in
1TB, 7200 rpm, SATA 6.0 Gb/s, SMART IV, 3.5 in
1TB, 10K rpm, SATA 6.0 Gb/s, SMART IV, 3.5 in
2TB, 7200 rpm, SATA 6.0 Gb/s, SMART IV, 3.5 in

Hybrid drives:

500GB SATA 6G 2.5 (8GB cache) Solid State Hybrid Drives (SSHD Drive)
500GB SATA 6G 2.5 2nd Drive (8GB cache) with 3.5 inch adapter
1TB SATA 6G 2.5 (8GB cache) SSHD Drive
1TB SATA 6G 2.5 2nd Drive (8GB cache) with 3.5-inch adapter

Solid State Drives (SSD):

120GB SATA 6G 2.5 SSD with 3.5-inch adapter
128GB with 3.5-inch adapter
160GB with 3.5-inch adapter

SATA self-encrypting Solid State Drive:
256GB with 3.5-inch adapter
Optical disc drives:

Slim DVD-ROM
Slim BDXL Blu-ray writer
Slim SuperMulti DVD writer