Re: RAID 1 on a server with possible mad mobo

berk walker <berk@xxxxxxxxx> · Tue, 08 Mar 2005 20:08:44 -0500

Grub is referenced to your boot drive, then from that it makes all 
references in relation to /.  The dox on that slightly sux, but it is 
really easy to see, if you can change to boot drive in bios. Run it 
crossways, whatever.  The bios disk boots, and will become home of /.  
Well, at least it has for me for 5 yrs.  Now your milage may vary, 
depending upon which disk your are booting, and the various flavours you 
have available on all of your bootable disks.  Xandros is really willing 
to try anything - suse barely likes itself.  The bottom line is to ask 
it.  Set up a configuration and try it.  It is a *good thing* to be 
backed up, tho.... I have seen OSs that automounted file systems rw, and 
then proceeded to trash them, presumably from ignorance.  One thing 
might be - if grub wants hd 0,0 is to have nothing there, I never do.

just a thought.

b-

Colin McDonald wrote:

Thanks for the suggestions.

Let me ask an additional question.

Is it a bad idea to write the grub to a software mirror. Is it written
to a specific disk when this is done?

If I had a corrupt boot loader or boot sector and i needed to rescue.
Would I point to the md device or one of the disks (or both).

TIA

On Tue, 08 Mar 2005 13:48:03 -0500, Paul Clements

<paul.clements@xxxxxxxxxxxx> wrote:

Colin McDonald wrote:

Without taking up to much of y'alls time, what would be the best

solution for moving the RAID array over to a new box?

2. Try to boot off of the disks after they have been transferred into

the new machine? I know this will cause all kinds of problems with

kernel/devices, etc and probably won't work.

Actually, I've done this a couple of times with both Red Hat and SUSE
and it's worked surprisingly well. With the kernel being mostly modular
and the hardware detection/configuration utilities being pretty advanced
these days, it's not much of a problem. (I had a minor issue with SUSE
doing this sort of thing because the MAC address of the NIC was
different, so the network stuff was not getting configured. On Red Hat
[and hopefully Fedora is still the same] you should get prompted at
bootup if there is any hardware to add or remove.)

Especially if you're wanting to keep the system configuration exactly
the same, this may be the way to go, rather than trying to reconfigure
everything exactly the way you had it before.

And of course if, after booting the new system with the old disks, you
find that things are not quite right, you can always re-install at that
point...

--
Paul

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