Hello everyone -

Please forgive me if I violate the forum's etiquette as this is my very first post. I'm posting this on both the dummies and the advance section with the hope for any responses.

I stumbled on this forum while frantically looking for an answer to a dumb, ignorant thing I did today.

I inherited a system and while doing some exploratory tasks, I used the "fdisk /dev/sdb" command to look inside the disk /dev/sdb. While there, I accidentally hit the 'd', enter, 'w' ... effectively wiped out /dev/sdb?

Here's what I found:
(1) /dev/sdb is a stack of four drives belonging to a hardware RAID5 setup.

(2) The /etc/fstab file has this labeled as "home" and mounted as /home on the system.

(3) Looked like users can still access /home for read/write, and they continues to log in and out.

And so, my question to all the gurus: What was the damage from my using of the fdisk tasks?