Btrfs Block Group Allocation Map

metadata chunk starts at 4194304, size is 8.00MB, 0.00% used, 0.00% fragmented

metadata chunk starts at 29360128, size is 1.00GB, 97.53% used, 4.50% fragmented

metadata chunk starts at 2176843776, size is 256.00MB, 73.09% used, 38.90% fragmented

metadata chunk starts at 2445279232, size is 256.00MB, 40.35% used, 26.08% fragmented

metadata chunk starts at 2713714688, size is 256.00MB, 70.71% used, 40.81% fragmented

metadata chunk starts at 2982150144, size is 256.00MB, 55.72% used, 48.29% fragmented

data - dark red, fs tree - black, extent tree - green, csum tree - blue, reloc tree - grey, other trees - red, unknown tree - dark grey