diff --git a/Repair-MongoDB.md b/Repair-MongoDB.md
index 341da56..5894e98 100644
--- a/Repair-MongoDB.md
+++ b/Repair-MongoDB.md
@@ -133,7 +133,7 @@ df -h
 25. Sync and save unwritted data to disk, and unmount external USB harddrive safely:
 ```
 sync
-umount /mnt
+umount /dev/sdd1
 ```
 26. Remove external USB harddisk from server.
 27. Login to WeKan, check do all WeKan boards work. In this case, all did work.
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