Hi,
Thanks everybody for your help. I have now fixed this on my machine
using code similar to that suggested by Peter Haight.
Edit "/usr/share/initramfs-tools/scripts/local" and find the following
comment "# We've given up, but we'll let the user fix matters if they
can".
Just before this comment add the following code:
# The following code was added to allow degraded RAID arrays to start
if [ ! -e "${ROOT}" ] || ! /lib/udev/vol_id "${ROOT}" >/dev/null 2>&1;
then
# Try mdadm and allow degraded arrays to start in case a drive
has failed
log_begin_msg "Attempting to start RAID arrays and allow
degraded arrays"
/sbin/mdadm --assemble --scan
log_end_msg
fi
Peter's suggestion of just using [ ! -e "${ROOT}" ] as the condition
test didn't work, so I used the condition test from the "if" block above
this code and it worked fine.
To rebuilt the boot image use "sudo update-initramfs -u" as suggested by
Plnt. This script calls the "mkinitramfs" script mentioned by Peter and
is easier to use as you don't have to supply the image name and other
options.
I have tested this a couple of times, with and without my other drives
plugged in without any problems. Just make sure you have a cron item
setup to run "mdadm --monitor --oneshot" to ensure the System
Administrator gets an email when an array is running degraded.
This has worked on my machine and I think this is a sound solution.
Please let me know if it solves your problems also.
This bug has the title "Bug #120375 is not in Ubuntu", does this mean
that it is not considered to be an Ubuntu bug? I believe it is due to
the fact that involves the way the startup scripts are configured (it is
definitely not a bug in mdadm). How do we get this escalated to an
Ubuntu bug so that it will be solved in future releases?
Good luck,
Ken
--
cannot boot raid1 with only one disk
https://bugs.launchpad.net/bugs/120375
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