Shit, I've followed the official documentation
https://btrfs.wiki.kernel.org/index.php/Using_Btrfs_with_Multiple_Devices#Replacing_failed_devices
With, as explain:
mkfs.btrfs -d single /dev/sda3 /dev/sdb1 /dev/sdc1 /dev/sdd1
mount -o degraded /dev/sda3 /media/single-raid/
btrfs device delete missing /media/single-raid/
And now all my datas on ALL drive has been deleted. How could I retrieve
datas on my Btrfs formatted partition now?!
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