I had same problem with P5B. I tried to install to PATA and SATA disks. PATA-drives were tested with different jumper settings, cable select/master/slave. I updated to newest beta bios version 0806 (2006/11/09 update) which solved the problem.
-- JMicron controllers not recognised by Grub? https://launchpad.net/bugs/64574 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
