diff --git a/HISTORY b/HISTORY
index 888f2d57..961ecfec 100644
--- a/HISTORY
+++ b/HISTORY
@@ -1,6 +1,11 @@
 SnapRAID HISTORY
 ================
 
+4.1 2013/9
+==========
+ * If the underline filesystem doesn't support the FIEMAP command,
+   fallback to use the inode number for sorting files.
+
 4.0 2013/9
 ==========
  * New 'scrub' command to periodically check the oldest blocks for silent
diff --git a/unix.c b/unix.c
index 3418c1f0..ba1dfbee 100644
--- a/unix.c
+++ b/unix.c
@@ -147,6 +147,14 @@ int filephy(const char* path, struct stat* st, uint64_t* physical)
 	fm.fiemap.fm_extent_count = 1; /* we are interested only at the first block */
 
 	if (ioctl(f, FS_IOC_FIEMAP, &fm) == -1) {
+		/* if the underline filesystem doesn't support FS_IOC_FIEMAP */
+		/* fallback to use the inode */
+		if (errno == ENOTSUP) {
+			close(f);
+			*physical = st->st_ino;
+			return 0;
+		}
+
 		close(f);
 		return -1;
 	}