diff --git a/cmd/agent/server/utils.go b/cmd/agent/server/utils.go
index d2d094635e484c067144b8eefefe04875c1b4a13..254bbac50ef3d0ca5020e1a9de84341afe9054e3 100644
--- a/cmd/agent/server/utils.go
+++ b/cmd/agent/server/utils.go
@@ -97,13 +97,12 @@ func getNextPart(partA string, partB string) (string, string, error) {
 	}
 	mountPoint := strings.TrimSpace(string(out))
 
-	side := partA
+	side := partA // 默认为sda2
+	next := "A"   // 默认为A
+
 	if mountPoint == "/" {
-		side = partB
-	}
-	next := "B"
-	if side != partB {
-		next = "A"
+    side = partB // 如果是根目录，设置为sda3
+    next = "B"   // 设置为B
 	}
 	return side, next, nil
 }