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Re: issue with mdadm and mirroring drives



okay..thanks for the clarification.
I think it was initrd - busybox.

my debian version is:
root@rider:~# lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description:    Debian GNU/Linux 6.0.3 (squeeze)
Release:        6.0.3
Codename:       squeeze

 uname -mrs
Linux 2.6.32-5-amd64 x86_64


I fooled around with the bois and I was able to both drives to be seen
and the good partition running and the drive is syncing.
Not really sure why it was behaving this way - but thanks to plug and
play - the running system seen the bad drive and i was able to sync
it.

Now, my question to you is:
1. what do I do next ?
do i run the command - "grub-install --recheck --no-floppy /dev/sdc1"
(sdc1 is my good drive)

2. Do i do this command after a reboot or just after the sync is done ?

3. I get this error regarding a Floppy Error  - I have no floppy
drives - how can i remove this ?

4. Do i have to update any of the mdadm files ? or any additional grub
files ? before or after I reboot ?


thanks for your help!
mjh



On Wed, Jan 18, 2012 at 2:07 PM, tv.debian@googlemail.com
<tv.debian@googlemail.com> wrote:
> 18/01/2012 19:38, Joey L wrote:
>> On Wed, Jan 18, 2012 at 12:49 PM, tv.debian@googlemail.com
>> <tv.debian@googlemail.com> wrote:
>>> > 18/01/2012 18:03, Joey L wrote:
>>>> >> The issue I am having is that if I put into the system both drives,
>>>> >> the system always chooses the faulty drive.
>>>> >> I do not even get linux system - i get a weird text prompt - i think
>>>> >> it is initrdfs - even if i change it in the bios.
>>>> >>
>>>> >> On installing grub - can you tell me what is the procedure for that
>>>> >> after i get my drives to an okay state ?
>>>> >>
>>>> >> thanks
>>>> >> mjh
>
> initrd is a later stage than grub menu, grub comes second after bios,
> and is in charge of loading the initrd. So if you get to the initrd
> "busybox" shell it means you got past the grub menu. Otherwise what you
> think is initrd really is either bios or grub.
>
> Maybe it's time you give us some details about your setup, what kind of
> computer is this, and what flavor of Debian are you running on it (grub
> version would be nice too) ?
> How exactly is the boot sequence occurring, what do you "see" and in
> what order ?
> How do you know it "chooses" the faulty drive ?
>
> No matter which drive the system boots on, it will fail to bring up the
> raid array your root partition resides on if it's flagged as degraded,
> unless you pass the necessary option I gave you earlier. It is possible
> to assemble the array from the busybox ("initrd") shell and resume the
> init ("boot") process, but if we don't have more details, or if you
> don't tell us exactly what you try and the result (error messages), we
> can keep shooting in the dark for a long time.
>
> If you can't get it to boot by itself it may be easier to boot from a
> recovery live-cd, any will do as long as it has mdadm installed or
> installable. From there it will be possible to start the degraded raid
> array, make sure it works, "chroot" on it (means "transferring" the
> live-cd shell to the target system), and then issue commands as if they
> were issued from the target system. Or for a start you could simply
> assemble the array, start it and mount the target system's partition,
> and edit the grub menu entry to add the necessary option.
>
>
> --
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