Small mistake Big data loss

I was reinstalling the comps in the lab last week. I set up an installation server through which nfs installation can be done. I was working all through last Monday to learn unattended installation. Finally i succeeded in the morning next day. As it is very installation is very easy unattended setup i tried installing on as many systems as I can. I have to go home on the next day.

In one of the systems FMB's project was there. And simply the unattended installation destroyed all those. really inattendly. The hell is that he doesn't have enough backup of those materials in the system. After an hour after this 'cleaning up' job phone call came from fmb.

The comp had about 2 GB of code. Their project is planned to be carried over to the next batch., ie, our batch. All of that is lost. I didn't ever think they had data on that comp. Anyway it made me really upset. I have been playing around with computers for about 5 yrs and this is the first time some thing wrong really happened.

Anyway there is nothing I can do now. So the installation process was postponed to June.