Cannot boot from software RAID with 2TB disks

[Christopher Chan]

On Thursday, May 13, 2010 09:24 AM, Tom H wrote:
> On Wed, May 12, 2010 at 8:51 PM, Christopher Chan
> <christopher.chan at bradbury.edu.hk>  wrote:
>> On Thursday, May 13, 2010 05:09 AM, Tom H wrote:
>>> On Wed, May 12, 2010 at 3:21 PM, Brian McKee<brian.mckee at gmail.com>    wrote:
>>>> On Wed, May 12, 2010 at 7:55 AM, Matthias Brennwald
>>>> <matthias at brennwald.org>    wrote:
>>>>> On May 12, 2010, at 9:58 AM, ubuntu-users-request at lists.ubuntu.com wrote:
>>>>>>> What are my options? I'd appreciate any hints and help on how I can make this install work.
>>>>>> Only one. Destroy and redo it. 2 disks mirrored for system and the other
>>>>>> three a raid5 to be used however you like.
>>>>> I just tried to install Ubuntu 10.04 onto a RAID1 with two disks. Same result. I still believe my problem is related to this:
>>>>> https://bugs.launchpad.net/ubuntu/+source/partman-base/+bug/506670
>>>>
>>>> Said bug (and I *think* the instructions you pointed to earlier) both
>>>> refer to grub.
>>>> Lucid uses Grub2 doesn't it?  I suspect your instructions are out of date.
>>>
>>> I suspect that in the instructions on
>>> https://help.ubuntu.com/community/Installation/SoftwareRAID
>>> grub refers to grub2 because that is/was the 9.10 default for a clean
>>> install. Anyway, grub1 doesn't do RAID.
>>
>> grub1 does not need to 'do' raid. grub1 has been used for mirrored /boot
>> or / for a very long time now.
>
> If you say so, although we have always used hardware RAID for /boot
> everywhere that I have worked, in some places, openly, because it was
> said that grub1 could not handle RAID. I have even insisted on
> hardware RAID when moonlighting... Oops! I will have to review my
> purchasing recommendations when installing Lenny or CentOS.

Nah, they should say the installer does not handle raid1 properly. There 
is a 'trick' to install grub1 on a software mirror to make sure that the 
box will still boot up if one of the hard disks die.

I don't know about the Ubuntu installer or the Debian installer but 
anaconda finally got that support six years ago.