We are a small heating and air conditioning company running ~ 15 computers connected to a W2K3 server. Most of our files are stored on individual computers but I would like to centralize things on a better server. Many people do not have a set desk, so being able to access their files from anywhere is important. I am going to build a decent file server (also functioning as a domain controller, e-mail, and web server in the future) with an Intel P-D 805, 2GB of RAM and now I am looking into a backup solution. We have a custom program for heating and air conditioning that runs on a seperate unix server, so the only real data that we would need to store on the file server would be e-mail, word documents, and pictures....basic stuff. I am estimating we will have ~100GB of data and grow from there. I am trying to figure out a good backup solution for us. I estimate that it would peak at 250GB of data, which gives me alot of room to spare. Tape drives seem to expensive and they are slow, so I am thinking I would use a hot swappable HD set as my backup solution. Our data is fairly important, nothing mission critical (that is on the other server). I would like to protect it with RAID 1, we dont necessarily require extreme speeds. Would it be best/easiest to use a RAID 1 array with 2/3 HDs? Each night hot-swapping 1 HD and letting it rebuild the array? or should I run a backup HD independent from the RAID 1 array that would take a nightly snapshot of the system then hot swap it every day. Is snapshotting as a backup solution reliable? or would I be better doing a normal backup of the data and create a Ghost Image of the basic OS for quick recovery. Sorry for the long post, I really appreciate any help you guys can provide. Thanks.