Re: Raid 5

[Tom H <tomh0665@gmail.com>]

On Wed, Mar 6, 2013 at 4:54 PM, Gary Dale <garydale@rogers.com> wrote:
> On 06/03/13 04:49 PM, Tom H wrote:
>> On Wed, Mar 6, 2013 at 1:59 PM, Gary Dale<garydale@rogers.com>  wrote:
>>>
>>> Sorry but this isn't difficult (although it may affect top-posters more
>>> than
>>> bottom posters :) ). The Debian installer allows you to create a
>>> whole-disk
>>> RAID array then partition it. You have a single RAID 5 array with some
>>> number of primary partitions (up to 4 - I use 2, / and /home, with swap
>>> files rather than swap partitions but traditionalists may prefer a swap
>>> partition). Grub treats the array like a disk drive and has no problem
>>> booting from it.
>>>
>>> One issue you may have with Squeeze (I recommend Wheezy instead) is that
>>> the
>>> UUID for / in grub.cfg may be wrong. Simply replace it with the correct
>>> one
>>> (probably for /dev/md0p1) and everything will work. You will have to
>>> repeat
>>> this anytime update-grub is run. This is not an issue with Wheezy.
>>
>> We must be using very different d-is!
>>
>> I've never seen an option to create a partitioned mdraid array for
>> either squeeze or wheezy.
>>
>> Furthermore, grub2 in squeeze cannot recognize partitioned mdraid
>> arrays; squeeze has grub2 version 1.98+20100804-14+squeeze1 and
>> partitioned mdraid support was introduced in version 1.99-1.
>
> You need the advanced install I believe. I have a Squeeze system booting
> into RAID 5 but, as I said, Wheezy is better. The Squeeze system has a
> problem with the UUIDs needing to be fixed after update-grub is run.

I've just created a wheezy VM and couldn't find any partitioned mdraid option.