We are looking at improving our backup solution. We don't have a huge amount of data to back up (currently ~500GB) which is backed up nightly onto an external HD. We have 3 of these HD, with one going in the firesafe on a weekly basis, and the other 2 rotating each night, so that the latest backup goes offsite overnight. The external HD are reaching capacity though, hence looking to upgrade.
There are a number of options that we could potentially utilise. I like the idea of a NAS server, with a 2TB drive. The size will allow future growth, without spending a huge amount. I'd like to get a second 2TB disk, and then swap this with a disk in the NAS on a daily basis. This is working on the assumption that the NAS has hot-swap disks, and so does not require powering down to swap a disk. My query is whether this is an effective way of using the NAS, or whether it will cause any problems with the NAS.
Another option is that we have a RAID 1 in the NAS, and swap out a disk daily, I'm just wondering how efficient that would be, as effectively the RAID1 array will be re-built on a daily basis, and I'm not sure how onerous this will be on the disks.