i386/109968: Panic while booting with PCscsi II AM53C974AKC SCSI card by 6.1RC or 6.2 iso CD

[Sunry Chen]

>Number:         109968
>Category:       i386
>Synopsis:       Panic while booting with PCscsi II AM53C974AKC SCSI card by 6.1RC or 6.2 iso CD
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-i386
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Mar 06 06:30:33 GMT 2007
>Closed-Date:
>Last-Modified:
>Originator:     Sunry Chen
>Release:        6.1RC and 6.2 iso download from FTP
>Organization:
SSTI
>Environment:
Can't get into system.
>Description:
I used 5.4 before in the old machine with Pentium 133, 128MB ram, and a PCI SCSI card(PCscsi II AM53C974AKC) with a 2GB harddisk.

I installed 5.4 with 5.4 iso CD long time ago, the 5.4 works very well in the box.

Now I want to change all the system to 6.2.

Downloaded 6.2 iso files from FTP, burned them to CDs. I tested the CDs on other machine and virtual machine, it works well.

While I try to boot the old machine with that PCscsi II SCSI card, it panic on booting. Or it might not call panic, I saw lots of same stuffs scrolling the screen, looks like some register name and value display continue on the screen, and the keyboard locked.

The display stuffs looks like:
esx=00 00 22 11 44 55 00  asx=00 22 33 55 66 99 99

I facked the values and the length. It scrolling too fast, I can't see it clearly.

If I unplug the PCI SCSI card, it boots ok. I also tried to plug the card in different PCI slots, but they are the same, no lucky.

I also tried 6.1RC CD which I burned before, it cause the same result with 6.2.
>How-To-Repeat:
Pluged the PCscsi II AM53C974AKC PCI card into slot, boot with 6.1RC or 6.2 CD.
>Fix:
Unplug the SCSI card, it means don't use it!
>Release-Note:
>Audit-Trail:
>Unformatted: