I second J.T's comments, EMC as with almost every other major array vendor do not use the same bog standard hard drives used in desktops.
Most enterprise array vendors use specially qualifed disks designed for 24/7 operation (vs desktops 9-5) often with several major differences including:
*520-bytes/sector vs 512 for desktop
*Time limited Error Recovery vs not
*End to End ECC vs desktop with often only write ECC
*Bit Error Rate (risk of data coruption) of <1 in 10^15 (for NL-SAS or NL-SATA) vs < 1 in 10^14 for desktop
*Higher Rotational Vibration tollerance designed for multiple drives vs limited RV for desktop
*Interposer cards and special "caddies" to further reduce vibrations
*Dual-Processors and Dual Ports (sometimes on the interposer card) for redundant path access vs single for desktop.
*FC or SAS interfaces (and sometimes SATA with expensive FC or SAS interposers) vs just SATA for the desktop.
*Extensive batch testing and qualification of drives
*Often the drives have screws at both ends of the spindle vs desktop's single
The list of differences is endless, but the result is the same, EMC as with almost every other vendor uses different disks to those used for desktops.