SCSI SYM53c8xx synchronous mode?

[Jeffrey Ross]

I've installed FC4 on an older compaq system that uses a sym53c8xx scsi 
controller.  I've been trying to get the scsi bus to run in sync mode 
with limited success.

Looking at the docs for the kernel module sym53c8xx_2 I found the 
following for setting sync mode on boot with lilo (along with a few 
other options):

lilo: linux root=/dev/sda2 sym53c8xx.cmd_per_lun=4 sym53c8xx.sync=10 
sym53c8xx.debug=0x200

I then modified the kernel line in the grub.conf file:

kernel /boot/vmlinuz-2.6.11-1.1369_FC4smp ro root=/dev/md0 
sym53c8xx.sync=10 rhgb quiet

This resulted in an error during boot that "sym53c8xx.sync=10" was unknown.

I found that I could use the following command after the machine is up 
and running:

echo "setsync all 10" > /proc/scsi/sym53c8xx/1

I've since added that line to /etc/rc3.d/S99local

keep in mind the system boots off this controller, controller 0 is 
unused and its a 2 port scsi controller.   There is an IDE controller in 
the machine that handles only the CD-rom drive.

How do I have the kernel automatically put the scsi controller in sync 
mode at boot time, or am I stuck with the line in S99local?

TIA

Jeff