Differences

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--- ubuntu-raid1-conversion [2009/10/29 18:32] – snarg
+++ ubuntu-raid1-conversion [2009/10/30 17:46] (current) – snarg
@@ Line 214: / Line 214: @@
 </code>
 Now go back to the original terminal window and type:
+<code>
 sudo nano /mnt/temp-newroot/etc/fstab
 </code>
@@ Line 229: / Line 230: @@
 Use CTRL+W to save the fstab and exit nano text file editor.
-==12. Adjust UUID in /boot/grub/menu.lst to point to the new arrays==
+==12. Adjust UUID in /boot/grub/menu.lst to point to the new root array==
 This step will cause the bootloader to load up using the raid array (/dev/md0) instead of the old drive (/dev/sda1). This change is only temporary, as we are editting the file on the OLD root partition. We will fix this to be permanent once we reboot into the new system.
 <code>
@@ Line 315: / Line 316: @@
 Also a one-liner:
 <code>
-sudo mdadm --manage /dev/md1 --add /dev/sda2
+sudo mdadm --manage /dev/md1 --add /dev/sda5
 </code>
-==17. Watch some rebuild stats. - all done.==
+==17. Watch some rebuild stats. Dont forget the important last step.==
-Voila!
 Type "cat /proc/mdstat"  to get an idea of how the resync of both RAID-1 arrays is going. You can run this command as many times as you like, to monitor the progress. At the end of the resync, both arrays should show "[UU]" instead of "[U_]"
@@ Line 336: / Line 336: @@
 </code>
+==18. Final update to the bootloader to account for the first drive being changed.==
+Use nano to edit your /boot/grub/device.map
+<code>
+sudo nano /boot/grub/device.map
+</code>
+And make sure it looks like this: (note this should be the same as your bios hard disk boot order)
+<code>
+(hd0)   /dev/sda
+(hd1)   /dev/sdb
+</code>
+Type this to finalise the bootloader config and Master Boot Record on both hard disks:
+<code>
+sudo update-grub
+sudo grub-install /dev/sda
+sudo grub-install /dev/sdb
+</code>
+\\
+ALL DONE!!
+\\
+update- 20091030 - Please note that at time of writing there is a bug in GRUB 1.97 which causes a boot delay of about 10-20 seconds for boot partitions on RAID-1. This is a known problem and is being worked on. Please see: [[https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/396564]]