[CentOS] raid 1 question

Gerry Reno

greno at verizon.net
Thu Mar 7 23:54:44 UTC 2013


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






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