I would fire you for wasting 12 minutes each on some flacky DVD in a 8hr day
Really? perhaps you should learn to read and comprehend first? the OP clearly stated that this was:

1. A one off requirement.
2. For static data only.

There was no mention that this is a commercial requirement, on the other hand, the implication is that the need is a private, domestic one.

Also, DVDs are no more likely to be flaky (flack is WWII antiaircraft fire)
than a hard drive. Basically you get what you pay for and are lucky enough to receive. At least with a DVD it generally either works first time and for many times afterwards, or it does not work at all. Hard drives can fail catastrophically, without warning, and at any time.

I won't even bother to insult the intelligence of professionals by commenting on relying on a RAID array as an archive or security backup............ RAID needs to be backed up just like anything else.