Bug 755173

Description of problem:
After upgrading to Fedora 16 and GRUB2 the boot sequence has become extremely slow. In numbers:

(after 4  secs) GRUB Loading
(after 1  sec ) Welcome to GRUB!
(after 10 secs) error: fd0 read error
(after 8  secs) Grub menu



Version-Release number of selected component (if applicable):
grub2-1.99-12.fc16.x86_64

How reproducible:
100%

Steps to Reproduce:
1. Start with a F15 system using /boot on raid1
2. Upgrade to F16, including GRUB2
3. Reboot
  
Actual results:
An additional boot delay of 20 seconds.

Expected results:
Boot sequence without delay

Additional info:

It may be related to RAID:
https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/396564

Some info on the disk layout (sda, sdb and sdc all have the same layout):

Personalities : [raid6] [raid5] [raid4] [raid1] 
md0 : active raid1 sda1[0] sdc1[2] sdb1[1]
      496896 blocks [3/3] [UUU]
      
md3 : active raid5 sdb5[0] sdc5[2] sda5[1]
      146705280 blocks level 5, 64k chunk, algorithm 2 [3/3] [UUU]
      
md2 : active raid5 sdb3[0] sdc3[2] sda3[1]
      1027968 blocks level 5, 64k chunk, algorithm 2 [3/3] [UUU]
      
md1 : active raid5 sdb2[0] sdc2[2] sda2[1]
      163846656 blocks level 5, 256k chunk, algorithm 2 [3/3] [UUU]
      
unused devices: <none>                                                                                                                                      
[root@home07 ~]# mount /boot
mount: /dev/md0 already mounted or /boot busy
mount: according to mtab, /dev/md0 is already mounted on /boot
[root@home07 ~]# fdisk /dev/sda

Command (m for help): p

Disk /dev/sda: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders, total 312581808 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xf691f691

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1            2048      996029      496991   fd  Linux raid autodetect
/dev/sda2          996030   164842964    81923467+  fd  Linux raid autodetect
/dev/sda3       164842965   165871124      514080   fd  Linux raid autodetect
/dev/sda4       165871125   312576704    73352790    5  Extended
/dev/sda5       165871188   312576704    73352758+  fd  Linux raid autodetect

Command (m for help): q

[root@home07 ~]#