Problem booting a Compaq Proliant 1600.

[Michael L. Squires]

I had a similar problem with a machine with two Adaptec 2940UW 
controllers.  When I upgraded from somethng like 4.7 to 4.8 the machine 
stopped booting.  My workaround was to go with a single controller.

The problem seems to be that at some point in the 4.X development cycle 
the way in which SCSI controllers and disks are enumerated was changed. 
You might have more luck getting an answer on the freebsd-scsi mailing list.

(I'm afraid I didn't, I asked about the same question and got no answers)

I'm about to start working with a 5.3-STABLE box with an onboard 
dual-channel controller and an Adaptec 39160 dual channel controller in a 
PCI slot, so I'm expecting to run into this again.

(I do know that the controllers and disks are enumerated by sysctl 
entries ("sysctl -a").  I am wondering if booting off a live CD would 
allow you to run sysctl and find out how the physical disks and 
controllers are mapped to devices.

Mike Squires