pylkko wrote:if you dd over the disk space it does not matter whether the data is in btrfs or ext4 or even fat32.
pylkko wrote:The btrfs code base is based on ext4, it is similar in many respects. Subvolumes are like files. But that does not even matter as if you overwrite the disk, then it cannot be recovered (albeit for major players like nation states usign creative means like firmware hacking, but let's just leave that aside for now). So if you dd over the disk space it does not matter whether the data is in btrfs or ext4 or even fat32. But I am not sure I undersatnd what you are asking and maybe I am not reponding to your concern?
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