I'm currently running my storage server on 4x1TB disks in RAID5. There are no issues here, no lack of speed, no lack of performance.
But now these disks are getting out of free space and I have the following solutions:
- Buy some extra 1TB disks add them to the RAID5 array. (not future-proof, small disks)
- Buy 4x2TB disks, replace the current RAID5 array (and have the same 'free-space' problem next year)
- An unknown solution like the current RAID5 setup; where I can add bigger drives in the future without rebuilding the whole array of disks or where I shouldn't replace all disks to use the full capacity of those disks.
(I'm running a mdadm on Ubuntu)
So my question is number 3; Any ideas?