[ale] Grub and auxiliary boot partition

[Jeff Hubbs]

Greg -

I didn't mention the 24 additional disk drives and three 3Ware 8-drive 
controllers because they weren't germane to my question. :) 

I prefer not to rely on RAID for /boot. 

- Jeff

Greg Freemyer wrote:
> Jeff,
>
> I use a 2-disk 3ware controller specifically for my server boot drives.
>
> Seems like a 2-disk controller is about $100 and it prevents you
> worrying about grub issues.
>
> Greg
>
> On Thu, Apr 30, 2009 at 11:21 AM, Jeff Hubbs <jeffrey.hubbs at gmail.com> wrote:
>   
>> I have a server with two disks that I use for booting and rooting - sda and
>> sdb.  I partition them like this:
>>
>> |--sda1=/boot-----|--sda2 (type fd)------------------------|
>>
>> |--sdb1=/auxboot--|--sdb2 (type fd)------------------------|
>>
>> sdb1 and sdb2 are made into md0 in kernel RAID 1 and md0 is mounted as /.
>> sda1 and sdb1 have the bootable flag set.  /auxboot holds the same files as
>> /boot.
>>
>> I want to have things such that if sda is dead, grub can be told to boot
>> entirely using just sdb.
>>
>> When I install grub, I envision these commands:
>>
>> grub> root (hd0,0)
>>
>> grub> setup (hd0)
>> grub> root (hd1,0)
>> grub> setup (hd1)
>>
>>
>> Does that look like it will do what I want, acknowledging that the settings
>> in grub.conf in /boot
>> would come up and therefore would have to be changed by hand in the grub
>> start menu before actually
>>
>> booting?
>>
>> If so, I expect I could do away with the human intervention by putting sda
>> and sdb in the BIOS'
>> boot list in that order, changing the grub.conf in /auxboot to use sdb2 as
>> /, and then running the
>>
>> grub commands above.
>>
>> What do you think?
>>
>> - Jeff
>>
>>
>>
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>>     
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