--- grub-0.95/docs/grub.texi.recheck-bad	2005-07-25 17:55:57.000000000 -0400
+++ grub-0.95/docs/grub.texi	2005-07-25 17:58:00.000000000 -0400
@@ -3417,8 +3417,9 @@
 
 @item --recheck
 Recheck the device map, even if @file{/boot/grub/device.map} already
-exists. You should use this option whenever you add/remove a disk
-into/from your computer.
+exists.
+
+This option is unreliable and its use is strongly discouraged.
 @end table
 
 
--- grub-0.95/util/grub-install.in.recheck-bad	2005-07-25 17:58:19.000000000 -0400
+++ grub-0.95/util/grub-install.in	2005-07-25 18:05:14.000000000 -0400
@@ -68,6 +68,8 @@
   --force-lba             force GRUB to use LBA mode even for a buggy
                           BIOS
   --recheck               probe a device map even if it already exists
+                          This flag is unreliable and its use is
+                          strongly discouraged.
 
 INSTALL_DEVICE can be a GRUB device name or a system device filename.
 
@@ -328,7 +330,7 @@
 
 # If --recheck is specified, remove the device map, if present.
 if test $recheck = yes; then
-    rm -f $device_map
+    mv $device_map ${device_map}.backup
 fi
 
 # Create the device map file if it is not present.
@@ -357,7 +359,22 @@
 tmp=`sed -n '/^([fh]d[0-9]*)/s/\(^(.*)\).*/\1/p' $device_map \
     | sort | uniq -d | sed -n 1p`
 if test -n "$tmp"; then
-    echo "The drive $tmp is defined multiple times in the device map $device_map" 1>&2
+    echo "The drive $tmp is defined multiple times in the new device map." 1>&2
+    if test $recheck = yes; then
+        echo "Reverting to backed up copy." 1>&2
+        mv ${device_map}.backup $device_map
+    fi
+    exit 1
+fi
+
+# Make sure device.map has at least one hd device
+grep -q "^(hd[0-9]\+)" $device_map
+if [ "x$?" != "x0" ]; then
+    echo "No suitable drive was found in the generated device map." 1>&2
+    if test $recheck = yes; then
+        echo "Reverting to backed up copy." 1>&2
+        mv ${device_map}.backup $device_map
+    fi
     exit 1
 fi
 
--- grub-0.95/docs/grub-install.8.recheck-bad	2004-06-13 13:44:59.000000000 -0400
+++ grub-0.95/docs/grub-install.8	2005-07-25 18:15:02.000000000 -0400
@@ -30,6 +30,8 @@
 .TP
 \fB\-\-recheck\fR
 probe a device map even if it already exists
+
+This option is unreliable and its use is strongly discouraged.
 .PP
 INSTALL_DEVICE can be a GRUB device name or a system device filename.
 .SH "REPORTING BUGS"
--- grub-0.95/docs/grub.info.recheck-bad	2004-05-11 08:22:54.000000000 -0400
+++ grub-0.95/docs/grub.info	2005-07-25 18:16:09.000000000 -0400
@@ -3373,9 +3373,9 @@
 
 `--recheck'
      Recheck the device map, even if `/boot/grub/device.map' already
-     exists. You should use this option whenever you add/remove a disk
-     into/from your computer.
+     exists.
 
+     This option is unreliable and its use is strongly discouraged.
 
 File: grub.info,  Node: Invoking grub-md5-crypt,  Next: Invoking grub-terminfo,  Prev: Invoking grub-install,  Up: Top