On Sat, Feb 23, 2013 at 8:45 AM, Fred <fred.fredex@xxxxxxxxx> wrote:
> On Sat, Feb 23, 2013 at 2:16 AM, Arun Khan <knura9@xxxxxxxxx> wrote:
>
> > On Sat, Feb 23, 2013 at 9:46 AM, Fred <fred.fredex@xxxxxxxxx> wrote:
> >
> > > Previously I used a procedure where each partition was part of a
> separate
> > > RAID device, but this time I'm trying the HOWTO from the Centos WIKI on
> > > making a partitionable RAID pair.
> >
>
I use LVM on top of my softraid arrays.
boot is generally the only physical partition other than the LVM physical
volume.
> > Although the instructions work, there are pitfalls when one of the disk
> > fails.
> >
> > I sought help in this mailing list way back in June/July 2012 time
> > frame. I would suggest you search the list archives of that period.
> >
> > I did update dracut to the latest version but removing and restoring a
> > failed disk would not boot.
> >
> > Posted the problem in the madm mailing list as well with no resolution.
> >
> > > or more importantly, how can I solve it?
> >
>
The name of the softraid device is not what your initial ramdisk expects.
I noticed that one of my MDs was detected as md127 instead of md2 on a
recent install of 6.3. But my softraid array was not the root, so I
stopped it, re-assembled it and updated mdadm.conf.
Check your mdadm.conf config and compare it to the running softraid.
You'll likely have to boot to a rescue cd, assemble the raid array(s),
update your mdadm.conf, change root your CentOS install, and rebuild your
initial ramdisk (man mkinitrd).
> > See below.
> >
> > > I may have to revert to the other method, but I figured this one was
> > worth
> > > a try.
> >
> > I second the above option, if you have the luxury. In the "other"
> > method, the system at least boots with one disk gone.
> >
> > Ah, thanks for the tip. Guess I'll quit banging my head on the wall and
> use the same method I did before.
>
> Fred
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--
---~~.~~---
Mike
// SilverTip257 //
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