[CentOS] raid 1 question

[SilverTip257]

On Thu, Mar 7, 2013 at 6:54 PM, Gerry Reno <greno at verizon.net> wrote:

> On 03/07/2013 06:52 PM, Les Mikesell wrote:
> > On Thu, Mar 7, 2013 at 5:40 PM, John R Pierce <pierce at hogranch.com>
> wrote:
> >> On 3/7/2013 3:35 PM, Gerry Reno wrote:
> >>> Dave,  I've been using software raid with every type of RedHat distro
> RH/CentOS/Fedora for over 10 years without any
> >>> serious difficulties.  I don't quite understand the logic in all these
> negative statements about software raid on that
> >>> wiki page.  The worst I get into is I have to boot from a bootdisk if
> the MBR gets corrupted for any reason.  No big
> >>> deal.  Just rerun grub.
> >> have you been putting /boot on a mdraid?  that's what the article is
> >> recommending against.
> > I've put /boot on md  raid1 on a lot of machines (always drives small
> > enough to be MBR based) and never had any problem with the partition
> > looking enough like a native one for grub to boot it.  The worst thing
>

No problems here either - I have had /boot on software raid1 on quite a few
systems past and present.


> > I've seen about it is that some machines change their idea of bios
>

If I do have a drive fail, I can frequently hot-remove them and hot-add the
replacement drive to get it resyncing without powering off.


> > disk 0 and 1 when the first one fails, so your grub setup might be
> > wrong even after you do it on the 2nd disk - and that would be the
> > same with/without raid.   As long as you are prepared to boot from a
> > rescue disk you can fix it easily anyway.
> >
> Good point, Les.   Rescue disks and bootdisks are key and critical if
> you're going to use software raid.
>
>
I think we could argue that rescue disks are a necessity regardless one is
using software raid or not.  :)


>
>
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-- 
---~~.~~---
Mike
//  SilverTip257  //