[mythtv-users] Mirroring via LVM or RAID?

[Debabrata Banerjee]

Why would you upgrade grub? Does it stop booting your system for some 
reason? Upgrade it when you upgrade the distro..

AFAIK if you build the raid 1 at install time the fedora installer will do 
the grub magic for you. If you make it later you will have to do as I 
described, which isn't much different than doing one drive. And technically 
if you replace a disk with the same model and you don't know what you're 
doing with grub you can just copy the drive with dd, works just as well.

----- Original Message ----- 
From: "Sage" <sage at gypsycaravan.com>
To: "Discussion about mythtv" <mythtv-users at mythtv.org>
Sent: Saturday, July 08, 2006 3:45 AM
Subject: Re: [mythtv-users] Mirroring via LVM or RAID?


I'm not entirely sure we're talking about the same thing.  If you
install a new kernel or a new boot image, then no, you don't have to
update grub.  However, if you install a new version of grub, don't you
have to install it again?

Chris's claim is that lilo will install on both disks automatically --
I wasn't aware of this, but I suspect that lilo may be installing onto
the actual boot partition instead of the master boot record.  Grub
defaults to the master boot record, but if I recall correctly, you can
make it install to the first partition instead, at least in Fedora.
Most modern distributions use grub by default, so hopefully grub will
automatically support RAID 1 boot partitions in the future.  But I
know for a fact that it doesn't right now, because I just tried
booting the second disk on my own system yesterday, and no dice.  It's
got to be manually installed.  Maybe this is something that can be
done by the distribution, rather than needing to be built into grub?