Just as I was doing some research on hard drive duplicators and how accurate they are, I found Logicube Forensic Hard drive duplicator which uses MD5 and duplicates the hard drive at a speed of 3.5 GB/Minute. 
The Logicube website details the following:-“The Forensic MD5 system is designed specifically for the requirements of law enforcement, corporate security, and cyber crime investigation of forensic computer data. This hand-held IDE hard drive data capturing system is ideal for fast disk drive data seizure. Using its built-in CRC-32 engine, the MD5 allows for imaging speeds up to 3.3 GB/min. The system’s non-tampering drive capture ensures bit-for-bit accuracy, guaranteeing zero chance of alteration of the suspect and evidence drives. With it's lightweight portability, rugged construction and field tested capabilities, the MD5 is simply the best forensic hard drive data collection system for law enforcement, corporate security, and cyber crime investigation and prosecution.”
Also while searching I came across thep2pweblog where the author to had linked to the same gadget, interesting blog, subscribed to it.
Tejas Patel