speeding up hard drive wipe

[Noah]

Hi there,

I am using the wipe binary to erase a drive.  My hard dive is a 6TB SATA 
drive sitting in an USB drive box.

$ sudo wipe -q /dev/sdc
Okay to WIPE 1 special file ? (Yes/No) yes

The UI is telling me that it will take over 10 weeks to complete one 
round of WIPE.

Any clues how to speed this up?

The following DD command took a few hours.
dd if=/dev/urandom of=/dev/sdc bs=4k

Cheers