Re: RAID1 does not boot
sorry to bother you again. can you please give or guide me from where
i can find instruction for installation grub on both drives.
Thank you?
On Thu, Apr 5, 2012 at 7:18 PM, Muhammad Yousuf Khan <sirtcp@gmail.com> wrote:
> On Thu, Apr 5, 2012 at 6:25 PM, Camaleón <noelamac@gmail.com> wrote:
>> On Thu, 05 Apr 2012 17:09:53 +0500, Muhammad Yousuf Khan wrote:
>>
>> (please, keep a bottom posting style, it reads better)
>>
>>> On Thu, Apr 5, 2012 at 4:37 PM, Camaleón <noelamac@gmail.com> wrote:
>>
>> (...)
>>
>>>> My guess is that the problem here is booting from the raid volume.
>>
>>> Thanks, i found out the problem but still i am confused actually i have
>>> disk 1 and disk 2 with same specs like they both are 320 GB and same
>>> made. here is my partition flow (because i had tried installation so
>>> many times so i change the partition structure)
>>>
>>> 1. /Boot 1GB (Boot on and on RAID /dev/md0)
>>> 2. SWAP 4 GB (RAID /dev/md1)
>>> 3, / (remaining space) (RAID /dev/md2)
>>
>> So basically you have now included /boot and /swap into the RAID, right?
> YES both are raid volumes
>>
>>> now at the end after installation when system rebooted for the first
>>> time i receive "error loading operating system" actually in BIOS boot
>>> option i mistakenly selected SATA2 as boot instead of SATA 1. when i
>>> shift things back i manage to reach grub menu.
>>
>> Okay, so now you get to GRUB's menu and then, what happens? Can you
>> finally boot your installed system?
>>
>
> Yes. i can work normally as i boot from the grub menu. there is no
> problem at all. every thing is quite normal even here is the result of
> "cat /proc/mdadm
>
> Personalities : [raid1]
> md2 : active raid1 sda3[0] sdb3[1]
> 307588416 blocks [2/2] [UU]
>
> md1 : active (auto-read-only) raid1 sda2[0] sdb2[1]
> 3903680 blocks [2/2] [UU]
>
> md0 : active raid1 sda1[0] sdb1[1]
> 1076224 blocks [2/2] [UU]
>
>
>>> now the part where i am confuse is that i believed that the computer
>>> should have booted from SATA2 as well because boot partition is also
>>> installed over it too.
>>
>> (...)
>>
>> Mmm, IIRC software RAID (mdadm) needs from user intervention (manual
>> tweaking) when one of the disks goes offline (or you alter the disk order
>> at the BIOS ;-) ), at least for booting. I mean, you had to install GRUB
>> in both disks or something like that, I dont't remember the exact steps
>> but they should be documented...
>>
>> Greetings,
>>
>> --
>> Camaleón
>>
>>
>> --
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>>
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