I’m installing 3x2TB HDDs into my desktop pc. The drives are like-new.
Basically they will replace an ancient 2tb drive that is failing. The primary purpose will basically be data storage, media, torrents, and some games installed. Losing the drives to failure would not be catastrophic, just annoying.
So now I’m faced with how to set up these drives. I think I’d like to do a RAID to present the drives as one big volume. Here are my thoughts, and hopefully someone can help me make the right choice:
- RAID0: Would have been fine with the risk with 2 drives, but 3 drives seems like it’s tempting fate. But it might be fine, anyhow.
- RAID1: Lose half the capacity, but pretty braindead setup. Left wondering why pick this over RAID10?
- RAID10: Lose half the capacity… left wondering why pick this over RAID1?
- RAID5: Write hole problem in event of sudden shutoff, but I’m not running a data center that needs high reliability. I should probably buy a UPS to mitigate power outages, anyway. Would the parity calculation and all that stuff make this option slow?
I’ve also rejected considering things like ZFS or mdadm, because I don’t want to complicate my setup. Straight btrfs is straightforward.
I found this page where the person basically analyzed the performance of different RAID levels, but not with BTRFS. https://larryjordan.com/articles/real-world-speed-tests-for-different-hdd-raid-levels/ (PDF link with harder numbers in the post). So I’m not even sure if his analysis is at all helpful to me.
If anyone has thoughts on what RAID level is appropriate given my use-case, I’d love to hear it! Particularly if anyone knows about RAID1 vs RAID10 on btrfs.
If you just want to combine their capacities, and don’t need redundancy, then use single mode?
No need to use a raid mode for multi-device btrfs.
If you want to boost performance, then raid0. Raid5 doesn’t give you much afaik.
I was unfamiliar with single mode. What advantage does it give me over RAID0 in terms of combining their capacities?