Moving a server over to a RAID

[Rashkae]

Tom H wrote:

> First, if you crete the array while booted into your install, the
> superblock will have the correct hostname. Otherwise it will not
> auto-assemble but you will be able to assemble it manually and update
> the superblock with the new host info.
> 

This is where you misunderstood me.  If you create the the array in your 
own install, you will not have the correct hostname, because the default 
ubuntu initrd does not have a hostname, and your root file system will 
fail to auto-assemble on reboot.

https://bugs.launchpad.net/ubuntu/+source/mdadm/+bug/330399