Corinne’s post made me remember when my server died on me early this year – it was hell! My system disk has been corrupted and our most recent backup was from 2 months back. The server holds the ONLY complete copy of our company files then and we stand to lose a lot of work. Fortunately for us, we were able to rebuild the disk array (yup, we we’re on RAID) and that probably just saved my job.
If your going for RAID, don’t go for RAID 0. Go for RAID 1 or RAID 5 or RAID 10 but don’t use RAID 0. RAID 0 is great for expanding storage space but for making your files redundant, the best is RAID 1 (but it has serious costs – read/write penalties, disk costs). In my opinion, if you want to strike a balance on cost versus redundancy, go for RAID 5 with one or two spare disks.
Our current setup right now is this – RAID 5 disks on server host + rsync on cron at our backup server (both of which are running Fedora).