[CentOS] preferred software RAID 10?
Ross S. W. Walker
RWalker at medallion.com
Thu Jul 17 22:44:26 UTC 2008
Kai Schaetzl wrote:
> Rudi Ahlers wrote on Thu, 17 Jul 2008 23:10:48 +0200:
> > > /boot shouldn't be mirrored, as the BIOS won't know how to boot it.
> > > leave /dev/sdb1 the same size as /dev/sda1 and call it /boot2 and try
> > > to remember to copy /boot to /boot2 each time you update the kernel.
> > I understand this, but how do you boot from /boot2 on the second HDD if
> > the 1st have failed?
> You don't (*). I don't understand John's advice here. There is no problem
> md mirroring /boot. You just need to install grub a second time on the
> other disk. For that you have to boot from it. (I think I also did it
> successfully without booting from the other disk in the past, but last
> time I tried it it didn't want to work like I remembered it should.)
> (*) Anyway, you would boot from a Rescue CD or such and rename it ...
Yes, no problems, I had /boot mirrored across 4 drives (NAS box) and
grub installed on each.
If you use labels for /boot in fstab you don't even need to edit fstab
from a rescue CD, just remove the failed first drive and boot.
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