mkinitrd does not detect linear raid in /etc/raidtab. 

It is also sensitive to TAB/SPACE in raidtab.

The following modification solves these problems, note that mkinitrd
contains a tab, so that the bugzilla web interface will
probably slightly destroy this diff.

--- mkinitrd    Wed Jun 21 10:05:21 2000
+++ mkinitrd.mod        Wed Jun 21 09:52:43 2000
@@ -210,11 +210,14 @@
 if [ -z "$noraid" ]; then
     # load appropriate raid devices if necessary
     if grep '^/dev/md' $fstab | grep -v noauto >/dev/null 2>&1 ; then
-       for number in $(grep '^[        ]*raid-level' /etc/raidtab |
+       for number in $(grep '^[[:space:]]*raid-level' /etc/raidtab |
                          awk '{print $2}' | LC_ALL=C sort -u) ; do
            case $number in
            [0145])
                findmodule "" raid$number
+               ;;
+           linear)
+               findmodule "" linear
                ;;
            *)
                echo "raid level $number (in /etc/raidtab) not recognized"
>&2

This works well here, people using the linear raid facility have less
problems with updating kernels.

-psi