Moving a server over to a RAID

[justino garcia]

Why not use acronis for linux, or some imaging tool, but make sure your
current linux install has support for said raid card.

On Thu, Aug 19, 2010 at 12:09 PM, Rashkae <ubuntu at tigershaunt.com> wrote:

> Mike A. Leonetti wrote:
> >  I have a server now that has one drive and is not set up on a RAID
> > using Ubuntu 8.04.
> >
> > What I was going to do was boot with a Linux recovery disc, create a
> > RAID1 manually with mdadm on two new drives, and then copy all of the
> > data onto that then redo the boot partition.
> >
> > My question is, when I reboot, will Ubuntu automatically detect the RAID
> > for me or are there modules I have to install ahead of time to make sure
> > the RAID gets detected? Also, would anybody else handle the situation
> > differently :D.
> >
>
> There is going to be one hurdle you'll need to get over.. I forget the
> exact command I used to recover, but I'll give you the overview.
>
> When raid array's are created, they are given a "hostname", which, by
> default, will by the system hostname.  By default, mdadm will not
> auto-assemble raid arrays from a different hostname (to prevent
> misunderstandings when hard drives are moved between different systems.)
>  Unfortunately, Ubuntu must assemble the raid arrays from the Initrd
> system, which will probably not contain your hostname unless you have
> customized it.  I encountered this problem when I created the new array
> from the existing system, I do not know if you will have this issue when
> creating the array from the rescue cd.
>
> When I tried to reboot the system, it was unable to mount the root
> filesystem.  However, initrd dropped me to a busybox shell, from which I
> was able to run mdadm with options that would assemble the correct array
> *and* update the hostname of the array, (which I think is simply "", ie.
> empty, in initrd.)
>
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-- 
Justin
IT-TECH
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