On 2018-09-20 05:35 PM, Adrian Bastholm wrote: > Thanks a lot for the detailed explanation. > Aabout "stable hardware/no lying hardware". I'm not running any raid > hardware, was planning on just software raid. three drives glued > together with "mkfs.btrfs -d raid5 /dev/sdb /dev/sdc /dev/sdd". Would > this be a safer bet, or would You recommend running the sausage method > instead, with "-d single" for safety ? I'm guessing that if one of the > drives dies the data is completely lost > Another variant I was considering is running a raid1 mirror on two of > the drives and maybe a subvolume on the third, for less important > stuff In case you were not aware, it's perfectly acceptable with BTRFS to use Raid 1 over 3 devices. Even more amazing, regardless of how many devices you start with, 2, 3, 4, whatever, you can add a single drive to the array to increase capacity, (at 50%, of course,, ie, adding a 4TB drive will give you 2TB usable space, assuming the other drives add up to at least 4TB to match it.)
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