[raidX vs single/dup]

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Hi btrfs guys,

could someone explain to me the differences in mkfs.btrfs:

- between -d raid0 and -d single

- between -m raid1 and -m dup

- between -m raid0 and -m single

My understanding is that raidX should be used in case of multi devices and single/dup should be used in case of single device to allow duplication, but it is not 100% clear to me...

As btrfs raid concepts are quite different from traditionnal raid, shouldn't we use the words "stripped" and "mirrored" instead of raid0/raid1? or even "single" and "duplicated"?
Then there would be no difference between single/raid0 and duplicated/raid1...

Regards,
Sam 		 	   		  --
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