How to securely wipe your ReadyNAS

Thanks again tristan...

For anyone still following along - I can report that trying to use sfill in secure mode (full 38 wipes with random data) was going to quite literally take a couple of weeks to complete on my 1TB array. I think it had only completed something like 36GB after 24 hours. So I decided to abort it and go with a couple variations of the less secure options:

sfill -l -v -z /c/
sfill -f -l -v /c/

These took several hours each but at least hit the entire array with a few overwrites.

I did also erase the swap space using sswap as follows:
Identify your swap partitions

cat /proc/swaps

disable them

sudo swapoff /dv/hdc2
sudo swapoff /dv/hde2
sudo swapoff /dv/hdg2

wipe them

sudo sswap /dev/hdc2
sudo sswap /dev/hde2
sudo sswap /dev/hdg2

These only took maybe 10-15 minutes each to complete.

Now on to the factory reset and then finally install the new drives!