On 04/05/2015 20:42, Nuno Magalhães wrote: > Greetings gents. > > I may have missed it, but i haven't seen this suggested yet: RAID+LVM. > If you already have a 3TB drive, buy another (or two more) and build a > RAID1 or 5 array on them. Then build your LVM on top of /dev/md0 (or > whatever device your raid is). > > Another approach is ZFS with RAID-Z or similar. I don't know how/if > ZFS splits data among the drives, but i assume it's wise enough to do > so in a way similar to a RAID+LVM combo.
That's a good analogy. ZFS spreads it's data out across multiple drives using an n-drives for data plus m-drives for parity type setup. And the whole lot forms a storage pool. The main difference is that ZFS does all it's checksumming in software, and it's one monolithic system. You can think of it being sort of a combination of RAID and LVM features, but it's not implemented that way. > If going RAID, make sure the rpm and cache are the same for > performance's sake, and you can mix and match drives from different > vendors (perhaps you should, to add to the redundancy). > > I don't know about btrfs, seems like it's still in a testing-phase so > i'm not touching it yet. > > Just my 2¢ > > Cheers, > Nuno > -- Alan McKinnon [email protected]
