I have been using the following scheme for the past two years with another vendor's RAID 1 device directly attached to one of my computers and shared over the network:
-- 2-Drive RAID 1 array with a 1TB drive in slot 1 (HD1) and and 1TB drive in slot 2 (HD2), and a third 1TB drive kept offsite (HD3).
-- Drive partitioned into two partitions and Time Machine configured to do a SparseBundle backup for each of the two machines on the network.
-- On a weekly basis, the following rotation scheme is used:
Step 1: After one week: rotate HD1 to an offsite location. Move HD2 to slot 1 in the NAS. Add HD3 to slot2 in the NAS.
Step 2: After one week: rotate HD2 to an offsite location. Move HD3 to slot 1 in the NAS. Add HD1 to slot2 in the NAS.
Step 3: After one week: rotate HD3 to an offsite location. Move HD1 to slot 1 in the NAS. Add HD2 to slot2 in the NAS.
-- Repeat the above on an ongoing basis
Apparently this plan requires that the RAID firmware can handle drives moving from slot-to-slot and also has the capacity to automatically re-mirror a new drive brought in to the array from offsite.
I am looking for a NAS solution to replicate the above so that the backup can be on the network and not depend on its physical attachment to a Mac on the network.
So, two questions:
1. Will your ReadyNAS products work with the above scheme?
2. Which product would be best?