--- a/usr/lib/byobu/disk_io
+++ b/usr/lib/byobu/disk_io
@@ -53,6 +53,7 @@ __disk_io() {
 		/dev/*) part="${mount_point}";;
 		*) part=$(awk '$2 == mp { print $1 ; exit(0); }' "mp=$mount_point" /etc/mtab);;
 	esac
+	[ -e "$part" ] || return
 	getdisk "$part"
 	local disk=${_RET}
 	local t2=$(date +%s) t1=