[arch-general] dmraid - Array failed - installed new pair of drives - any shortcuts for reinstall on new array?

[David C. Rankin]

Guys,

   I thought I would drop a line and see if anyone had done this recently. On a 
server I had a 2 disk array of 750G drives. One failed and I ran with a degraded 
array until the new pair of drives arrived. I installed the new drives and moved 
the good disk from the failed array to /dev/sdc. I rebooted, marked /dev/sdc 
(the sata disk in the BIOS) as bootable and deleted the old array and created a 
new one in the BIOS (for the new drives) and the box booted right up on the old 
drive.

   Where I'm needing help is reconfiguring dmraid. Currently, the box is still 
booting using the old dmraid designation for the degraded array even though I 
deleted the array in the BIOS. (which is pretty amazing). Here is how the system 
is currently running:

19:29 nirvana:~> df -h
Filesystem                      Size  Used Avail Use% Mounted on
udev                             10M     0   10M   0% /dev
run                              10M  152K  9.9M   2% /run
/dev/mapper/nvidia_ddddhhfhp5    23G   13G  9.4G  57% /
shm                             1.9G     0  1.9G   0% /dev/shm
/dev/mapper/nvidia_ddddhhfhp10  608G  380G  198G  66% /home
/dev/mapper/nvidia_ddddhhfhp7   122M   34M   82M  30% /boot
/dev/mapper/nvidia_ddddhhfhp8    23G  6.0G   16G  28% /var
/dev/mapper/nvidia_ddddhhfhp9    33G  8.1G   23G  27% /srv

   What I need to do is install Arch on the new array and then get rid of the 
dmraid config on the old drive so it just runs as /dev/sdc. After I have the 
base Arch install on the new array, I can simply move the information from 
/dev/sdc to the new array.

   Is there any shortcut to install Arch since I have the old install currently 
running? Or is it just easier to stick the install CD in and go through the base 
install on the new disks and then copy the old /var/cache/pacman/pkg to the new 
arrays to complete the package install with local packages?

   I'm fairly sure the dmraid designation with the old drive will take care of 
itself when I do the install on the new array, but I'm not certain.

   Any pointers or hints? Thanks

-- 
David C. Rankin, J.D.,P.E.