Index: hw/ide.c
===================================================================
RCS file: /sources/qemu/qemu/hw/ide.c,v
retrieving revision 1.53
diff -u -r1.53 ide.c
--- hw/ide.c	24 Jan 2007 21:35:22 -0000	1.53
+++ hw/ide.c	11 Feb 2007 20:32:24 -0000
@@ -1729,6 +1728,8 @@
                 goto abort_cmd;
             /* XXX: valid for CDROM ? */
             switch(s->feature) {
+            case 0xcc: /* reverting to power-on defaults enable */
+            case 0x66: /* reverting to power-on defaults disable*/
             case 0x02: /* write cache enable */
             case 0x82: /* write cache disable */
             case 0xaa: /* read look-ahead enable */