This was some time ago. I've learned a lot since. I mkfs'd the main disk on our email server. There was no redundancy. There was a new volume that needed to be formatted, my superior told me to do it. I protested that I didn't quite know how. He pushed it. So, I would up wiping it by mistake. since then I've made it a mission to make the entire stack at that place resilient and redundant. Now, it's virtualized, failover file and DB systems, NLB web servers, redundant storage, proper backups. It would take a hell of a lot more than what I did to make the same mistake again.