Is it sane to build a machine with RAID 5 expecting to hold around 5 Tb (and able to grow) with 1.5 or 2 Tb SATA II disks?
It will be used as audio and documents storage. I already have chosen a chassis with 16 3.5" hard drive bays. Now I'm thinking about what to put on those bays.
Pros I see:
- Cheaper per Tb
- Greater extensibility per chassis (3 times max capacity using 1.5 vs. 0.5)
It's the cons I'm wondering about. I expect using big disks to be slower, but is this really the case? I don't know about failure rates between small and big drives, are big ones expected to fail more often?
So, two questions:
What are the cons of building a 5Tb RAID5 with big disks?
Any particular drive model you'd recommend for either big (2Tb) or small (0.5Tb)?