Exteding root and swap, but i realized i have only 504 free instead of 512. Can anyone tell me where those 8mb go and how ?
I believe you are comparing MB to MiB?
all figures here are MiB if it was a MB MiB mismatch 512 becomes 488 not 504
LVM overheads/metadata
Think of it like when you format an external drive, you always get a little less available than advertised.
