diff b659fd6012a30b3e957e29716efd789f1a4618bb uncommitted
--- a/rc/bin/inst/prepdisk
+++ b/rc/bin/inst/prepdisk
@@ -14,7 +14,8 @@
 
 switch($1) {
 case checkready
-	if(! test -f /dev/sd*/plan9*){
+	disks=(/dev/sd*/plan9*)
+	if(! test -f $disks(1)){
 		prepdisk=notdone
 		export prepdisk
 	}