feat: Detect COW on BTRFS

  if [[ "$FS" == "overlay"* ]]; then

    info "Warning: the filesystem of $DIR is OverlayFS, this usually means it was binded to an invalid path!"

  fi

  if [[ "$FS" == "btrfs"* ]]; then

    FA=$(lsattr -d "$DIR")

    if [[ "$FA" != *"C"* ]]; then

      info "Warning: the filesystem of $DIR is BTRFS, and COW (copy on write) is not disabled for that folder!"

      info "This will negatively affect write performance, please empty the folder and disable COW (chattr +C <path>)."

    fi

  fi

  [ -z "$DISK_SPACE" ] && DISK_SPACE="16G"

  DISK_SPACE=$(echo "$DISK_SPACE" | sed 's/MB/M/g;s/GB/G/g;s/TB/T/g')