Index: parted-2.3/libparted/arch/linux.c
===================================================================
--- parted-2.3.orig/libparted/arch/linux.c	2010-05-10 10:57:54.000000000 +0000
+++ parted-2.3/libparted/arch/linux.c	2012-08-05 13:24:14.449768577 +0000
@@ -2415,6 +2415,11 @@
         ok = fscanf(fp, "%d", &range) == 1;
         fclose(fp);
 
+	/* starting at 2.6.28 partitions are OK but "range" doesn't show it */
+	if (dev->type == PED_DEVICE_MD && range == 1 &&
+	    _get_linux_version() >= KERNEL_VERSION (2,6,28))
+		ok = 0;
+
         /* (range <= 0) is none sense.*/
         return ok && range > 0 ? range : MAX_NUM_PARTS;
 }