Hi, 
New to the forums, i run a DNS 323 with 2x250GB Seagate Sata HDD's and have a laser printer attached, set up is Raid 1. Around 11 PC's back up their individual data on to the 323 several times a day through the LAN. Backup software i use is Second Copy.  
Have been using the unit since April 09 with very little trouble. 
This past week i was going out of of town and for some weird reason i went out on a Sunday to buy a 1TB USB drive and backed up all my data on it and left it at home. 
I return to the office this morning and all my data is gone... i can find Volume 1 on the network, i enter it but there is absolutely nothing there. 
I log into the interface but it asks me to pick an option for formatting just like when i popped in the drives for the first time.  I am pretty confused as to how this would happen? 
any ideas? if i didn't have the USB back up i am pretty sure i would have collapsed then and there. in fact believe it or not, i am home sick right now coz my stomach went for a doozy. 
cheers, 
Skinny.