2.6.16.20 fails to boot on SATA system but works on IDE

[Barry Scott]

After failing to get 2.6.17-rc6 working on a HP dc7600U I went back
to 2.6.16.20. It also fails to find any volume group during boot.

I think this might be problem with SATA as I can boot the same build on
two other systems that have IDE disks.

I get success on VIA Epia M10000 and a P4 Shuttle systems that use
IDE disks but fail on the HP dc7600U that uses a SATA disk. All three
systems use LVM2.

The Fedora build of 2.6.16 works on all three systems.

I'm going to see if there are debug messages I can turn on it libata
and md that might give more information.

Any suggestions as to what I can do to track down this problem?

Barry

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