Rackmounts
IEC-620
The IEC-260 features 4 x 5.25" Drives (External) & 4 x 3.5" Drives (2 x External, 2 x Internal).
IEC-822
The IEC-822 features 3 x 5.25" Drive (External) & 3 x 3.5" Drives (1 x External, 2x Internal)
IEC-830
The IEC-830 fault resilient chassis features 3 x 5.25" Drives (External) & 3 x 3.5" Drives (1 x External, 2 x Internal)