diff --git a/weed/command/volume.go b/weed/command/volume.go
index 91d9fb925..3ad8ba1bb 100644
--- a/weed/command/volume.go
+++ b/weed/command/volume.go
@@ -40,7 +40,7 @@ type VolumeServerOptions struct {
 	portGrpc                  *int
 	publicPort                *int
 	folders                   []string
-	folderMaxLimits           []int
+	folderMaxLimits           []int32
 	idxFolder                 *string
 	ip                        *string
 	publicUrl                 *string
@@ -148,8 +148,8 @@ func (v VolumeServerOptions) startVolumeServer(volumeFolders, maxVolumeCounts, v
 	// set max
 	maxCountStrings := strings.Split(maxVolumeCounts, ",")
 	for _, maxString := range maxCountStrings {
-		if max, e := strconv.Atoi(maxString); e == nil {
-			v.folderMaxLimits = append(v.folderMaxLimits, max)
+		if max, e := strconv.ParseInt(maxString, 10, 64); e == nil {
+			v.folderMaxLimits = append(v.folderMaxLimits, int32(max))
 		} else {
 			glog.Fatalf("The max specified in -max not a valid number %s", maxString)
 		}
diff --git a/weed/server/volume_server.go b/weed/server/volume_server.go
index c337fa740..46bf746f7 100644
--- a/weed/server/volume_server.go
+++ b/weed/server/volume_server.go
@@ -51,7 +51,7 @@ type VolumeServer struct {
 
 func NewVolumeServer(adminMux, publicMux *http.ServeMux, ip string,
 	port int, grpcPort int, publicUrl string,
-	folders []string, maxCounts []int, minFreeSpaces []util.MinFreeSpace, diskTypes []types.DiskType,
+	folders []string, maxCounts []int32, minFreeSpaces []util.MinFreeSpace, diskTypes []types.DiskType,
 	idxFolder string,
 	needleMapKind storage.NeedleMapKind,
 	masterNodes []pb.ServerAddress, pulseSeconds int,
diff --git a/weed/storage/store.go b/weed/storage/store.go
index 643c71c6d..3cb35cb85 100644
--- a/weed/storage/store.go
+++ b/weed/storage/store.go
@@ -65,7 +65,7 @@ func (s *Store) String() (str string) {
 	return
 }
 
-func NewStore(grpcDialOption grpc.DialOption, ip string, port int, grpcPort int, publicUrl string, dirnames []string, maxVolumeCounts []int,
+func NewStore(grpcDialOption grpc.DialOption, ip string, port int, grpcPort int, publicUrl string, dirnames []string, maxVolumeCounts []int32,
 	minFreeSpaces []util.MinFreeSpace, idxFolder string, needleMapKind NeedleMapKind, diskTypes []DiskType) (s *Store) {
 	s = &Store{grpcDialOption: grpcDialOption, Port: port, Ip: ip, GrpcPort: grpcPort, PublicUrl: publicUrl, NeedleMapKind: needleMapKind}
 	s.Locations = make([]*DiskLocation, 0)