diff --git a/internal/caches/storage_file.go b/internal/caches/storage_file.go
index 438992a..3344c94 100644
--- a/internal/caches/storage_file.go
+++ b/internal/caches/storage_file.go
@@ -1418,14 +1418,14 @@ func (this *FileStorage) checkDiskSpace() {
 	if this.options != nil && len(this.options.Dir) > 0 {
 		stat, err := fsutils.Stat(this.options.Dir)
 		if err == nil {
-			this.mainDiskIsFull = stat.AvailableSize() < MinDiskSpace
+			this.mainDiskIsFull = stat.FreeSize() < MinDiskSpace
 		}
 	}
 	var subDirs = this.subDirs // copy slice
 	for _, subDir := range subDirs {
 		stat, err := fsutils.Stat(subDir.Path)
 		if err == nil {
-			subDir.IsFull = stat.AvailableSize() < MinDiskSpace
+			subDir.IsFull = stat.FreeSize() < MinDiskSpace
 		}
 	}
 }
diff --git a/internal/nodes/node_status_executor.go b/internal/nodes/node_status_executor.go
index 1cf0593..cb56c59 100644
--- a/internal/nodes/node_status_executor.go
+++ b/internal/nodes/node_status_executor.go
@@ -286,7 +286,7 @@ func (this *NodeStatusExecutor) updateCacheSpace(status *nodeconfigs.NodeStatus)
 		result = append(result, maps.Map{
 			"path":  path,
 			"total": stat.TotalSize(),
-			"avail": stat.AvailableSize(),
+			"avail": stat.FreeSize(),
 			"used":  stat.UsedSize(),
 		})
 	}
diff --git a/internal/utils/fs/stat.go b/internal/utils/fs/stat.go
index 9eaac30..2fc847b 100644
--- a/internal/utils/fs/stat.go
+++ b/internal/utils/fs/stat.go
@@ -65,8 +65,8 @@ func NewStatResult(rawStat *unix.Statfs_t) *StatResult {
 	}
 }
 
-func (this *StatResult) AvailableSize() uint64 {
-	return this.rawStat.Bavail * this.blockSize
+func (this *StatResult) FreeSize() uint64 {
+	return this.rawStat.Bfree * this.blockSize
 }
 
 func (this *StatResult) TotalSize() uint64 {
@@ -74,8 +74,8 @@ func (this *StatResult) TotalSize() uint64 {
 }
 
 func (this *StatResult) UsedSize() uint64 {
-	if this.rawStat.Bavail <= this.rawStat.Blocks {
-		return (this.rawStat.Blocks - this.rawStat.Bavail) * this.blockSize
+	if this.rawStat.Bfree <= this.rawStat.Blocks {
+		return (this.rawStat.Blocks - this.rawStat.Bfree) * this.blockSize
 	}
 	return 0
 }
diff --git a/internal/utils/fs/stat_test.go b/internal/utils/fs/stat_test.go
index e9f36b0..e8490c9 100644
--- a/internal/utils/fs/stat_test.go
+++ b/internal/utils/fs/stat_test.go
@@ -14,7 +14,7 @@ func TestStat(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	t.Log("available:", stat.AvailableSize()/(1<<30), "total:", stat.TotalSize()/(1<<30), "used:", stat.UsedSize()/(1<<30))
+	t.Log("free:", stat.FreeSize()/(1<<30), "total:", stat.TotalSize()/(1<<30), "used:", stat.UsedSize()/(1<<30))
 }
 
 func TestStatCache(t *testing.T) {
@@ -23,7 +23,7 @@ func TestStatCache(t *testing.T) {
 		if err != nil {
 			t.Fatal(err)
 		}
-		t.Log("available:", stat.AvailableSize()/(1<<30), "total:", stat.TotalSize()/(1<<30), "used:", stat.UsedSize()/(1<<30))
+		t.Log("free:", stat.FreeSize()/(1<<30), "total:", stat.TotalSize()/(1<<30), "used:", stat.UsedSize()/(1<<30))
 	}
 }