Install Boot Problem

[Chris Samaritoni <chris@nexus9.com>]

Hello,

I'm trying to install Debian 2.2rev2 on an Ultra 5 workstation. I already 
have Redhat 6.2 working on it, but wanted to try Debian. When booting from 
the cdrom after I choose "s", it starts to boot up, but then runs into the 
following error:

request_module[block-major-11]: Root fs not mounted
VFS: Cannot open root device 0b:00
Kernel panic: VFS: Unable to mount root fs on 0b:00
Press L1-A to return to the boot prom

Does anyone know what may be going wrong and what is "block-major-11"?

Thanks.
chris.