Hello!

I create a btrfs volume comprised of two partitions:

# mkfs.btrfs -m dup -d single /dev/sdd1 /dev/sde1

metadata ist mirrored on each device, data chunks are scattered more or less 
randomly on one disk. 

a) If one disk fails, is there any chance of data recovery? 
b) If not, is there any advantage over a raid0 configuration.

Thanks and regards,

Florian
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