diff --git a/conf/mount_disk.sh b/conf/mount_disk.sh
index d129c56..e22bdf4 100755
--- a/conf/mount_disk.sh
+++ b/conf/mount_disk.sh
@@ -4,7 +4,7 @@ then
     datadir=__DATADIR__
     format=$1
     i=0
-    while $(fdisk -l /dev/nbd$i  1&>2 /dev/null)
+    while fdisk -l /dev/nbd$i  1> /dev/null 2> /dev/null
     do
         i=$(( i + 1 ))
     done