On Fri, 2016-06-03 at 13:42 -0500, Mitchell Fossen wrote: > Thanks for pointing that out, so if I'm thinking correctly, with > RAID1 > it's just that there is a copy of the data somewhere on some other > drive. > > With RAID10, there's still only 1 other copy, but the entire > "original" > disk is mirrored to another one, right?
To be honest, I couldn't tell you for sure :-/ ... IMHO the btrfs documentation has some "issues". mkfs.btrfs(8) says: 2 copies for RAID10, so I'd assume it's just the striped version of what btrfs - for whichever questionable reason - calls "RAID1". Especially, when you have an odd number devices (or devices with different sizes), its not clear to me, personally, at all how far that redundancy actually goes respectively what btrfs actually does... could be that you have your 2 copies, but maybe on the same device then? Cheers, Chris.
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