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I have an older server with / on one hard drive and /srv on a RAID1 partition, which I remember took some time to set up (I set it up after the installation). I will be installing Ubuntu 10.04 onto a new server, but would like to take the /srv hard drives to the new machine.

What steps need to be taken to ensure a complete and proper migration? Should I tell the installer about the additional drives, or connect them after setup has completed?

For reference, I will be installing the "Standard" Ubuntu desktop, and adding server applications, rather than installing a "Server" Ubuntu and adding desktop applications.

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closed as too localized by Luis Alvarado Mar 14 '13 at 17:16

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

do you want to install ubuntu on a NEW server, or do you want to upgrade the EXISTING server with a new OS? – aatdark Sep 16 '10 at 20:36
I am installing Ubuntu on a new computer, and will be physically moving two hard drives from the old server to the new one and would like to keep them RAIDed. – MighMoS Sep 16 '10 at 20:42

I checked in a VirtualBox: The Desktop Installer does not recognize existing mdadm Raid1 devices.

You should

  • install ubuntu
  • plugin the 2 raid hdds afterwards.
  • (you should reboot to be on the safe side)
  • Then install mdadm with sudo apt-get install mdadm
  • cat /proc/mdstat You should see your inactive RAID
  • sudo mdadm --assemble /dev/md_d0 /dev/sdb1 /dev/sdc1 (change the sdb1 and sdc1 to your raid partitions)
  • sudo mdadm --detail --scan

The output on my system is:

  berni@virtual2:~$ sudo mdadm --detail --scan
  ARRAY /dev/md/d0 level=raid1 num-devices=2 metadata=00.90 UUID=bcb40263:0fe2be0e:4a925ea7:19eea675
  • Copy the whole ARRAY .. line to the end of /etc/mdadm/mdadm.conf
  • Now your raidconfig is preserved and you can use /dev/md0 as a normal device
  • For example sudo mount /dev/md0 /mnt/raid

This stuff is working on Lucid & Maverick

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