Trouble upgrading from 7.0 to 7.2

["" <joejansen vei net>]

Hey everyone.....

I have a machine at home that is currently running RH 7.0 and win 98 in a dual 
boot setup.  It has 2 hard drives.  hda is partitioned at 10GB fat for windows, 
and 5GB ext2 for RH.  hdb is 3gb all ext2.  They are both on IDE1 on my onboard 
ide controller.  IDE2 is dedicated to the CD-rom drive

I have tried to install RH 7.2, but it cannot get past the hda scan at startup. 
 one of the startup msgs recommends setting pci=biosirq, which I do at LILO.  
This gets it past the initial scan with several messages that go scrolling 
past, referring, I believe, to CRC check errors.  However, anaconda hangs 
trying to detect the drive later in the setup.  (for the record, Mandrake 8.1 
has the exact same problem, including setting the flag).

It was recommended that I turn off UDMA access to the drives, but that option 
is not available in my BIOS.  The hardware check at startup does show that both 
drives are using UDMA2.  My BIOS (amibios) does allow me to set PIO level, 
which is autosetting at 4 for both hdd's, and 3 for the cdrom.

My question (finally) is:  What is different that would cause 7.0 to function 
perfectly, but lock up 7.2 during initial bootup of the install?  Is there a 
kernel flag (or several) that I can set to give it better instructions as to 
what my hardware is?  Remember, 7.0 continues to work without any CRC errors or 
anything else at startup.

Thanks in advance for any replies!

--Joe Jansen

(oh, btw, hda is an IBM hard drive)  Motherboard is a no-name generic with a 
cyrix MX 333 processor, 64MB RAM.

Thanks!   --Joe