I'm building a PC to be used exclusively as a small fileserver for an office of 3 (perhaps ultimately 4) people who use standard Office 2003 apps Word, Excel and Outlook in their daily work. The office already has a 100mbps wired network, and I'm going to run just Windows XP Pro on the new machine, sharing folders with different permissions to give public and private storage on the fileserver for documents so they can be backed up centrally.
There is currently about 4.5 - 5.0 GB of data spread between the 3 workstation machines, which will all be taken off the workstations' local drives and stored on the server. (No-one works out of the office, so we can assume the network will always be there)
What would be the best backup technology to use for 5 GB, perhaps with room to grow by up to double to 8-10 GB?
Budget is relatively tight, we have about GBP 600 (USD 1000 - 1100) for hardware. Ideally the backup would be unattended, run overnight (so speed isn't a massive concern) automatically, onto removable storage which can be taken offsite at the end of each day - perhaps in rotation, and must be easy for non-technical people to manage.
On my own PC I have a Travan NS-20 backup drive, it's not enormous but it's big enough, it's faily slow but can do the job overnight. I have 10 cartridges and do full backups each night, rotating the cartridges so I have 5 daily backups which are overwritten every 6th day, and 5 weekly backups which are overwritten every 6th week.
The NS-20 drive is pretty old now, and I don't see it in suppliers' catalogues or websites these days. Has the technology been replaced with something else? Other tape systems are very expensive.
Dual Layer DVD is a possibility, as is Iomega's Rev drive - but I'm not sure if there's anything better, or if those two are likely to do the job fairly automatically and very easily.