Can't add new 1TB disk in FreeBSD 6.1

[Don O'Neil]

I just swapped out an old 500G disk with a 1TB one and I'm trying to label
it and mount it...

If I run bsdlabel -w ad4, I get:

bsdlabel: Geom not found

If I run sysinstall, it tells me that it can't write to the disk.

I've tried an old 'bypass': sysctl kern.geom.debugflags=16, but that didn't
help.

Can anyone help me get this new disk installed without having to boot off a
recovery CD? The server is 500 miles away from me and I don't have direct
console access.

Thanks!!!