grub "Error 2"?

[Johan Ihren <johani%johani.org@localhost>]

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I'm trying to clone a box that's running NetBSD/Xen just fine and I'm  
running headlong into grub frustration.

Attempt #1:

copy the disklabel (two identical disks), newfs the new disk and then  
dump + restore + grub-install /dev/rwd1d.

This results in a new disk that boots NetBSD just fine with the  
NetBSD bootloader but fails to install grub:

box:/root#grub-install /dev/rwd0d
The file /grub/stage1 not read correctly.

This also fails:

box:/root#grub
grub> root (hd0,a)

Error 5: Partition table invalid or corrupt

I can not find any problems with either disk, partition table or  
anything else...

Attempt #2:

No dick copying, instead fresh install of NetBSD 3.1 followed by  
pkg_add the xenkernel20, xentools20 and grub packages. Then a new  
"grub-install /dev/rwd0d" (which seems to work out just fine, no  
errors). We get a nice looking /grub/devices.map file and everything  
looks fine. So we reboot:

"GRUB loading stage 1.5"

followed by:

"GRUB loading, please wait"

followed by:

"Error 2"

and no further action. This last message looks suspiciously like an  
error message from the NetBSD bootloader, but I have no idea why that  
would be.

Note that (a) this is with a single large (80GB) root partition  
(which works just fine for me on at least four other systems) and (b)  
I wonder a bit what the "e" in "grub> root (hd0,e)" in the Xen guide  
refers to?

Any input welcome, this is becoming a bit of a pain, because the  
machine is literally on the other side of the planet compared to me.

Regards,

Johan

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