best utility for disaster recovery access to windows server (dell raid)

What is the best tool to use to copy off about 1tb of data from a windows 2012 r2 dell t610 server that will not boot into windows. I have tried  a parallel installation with no success. This system has a DRAC enterprise and I know I can use the USB drive to copy data off manually but it will take too long.

I am looking for a program that I can boot into and access the drive (Dell RAID array) and then map to a network resource and copy the data off to.

Thank you.
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