[SDBUG] Dell PowerEdge >4Gig RAM with SCSI?

[Matthew Szubrycht]

Hello list members,

My name is Matt and I am brand new member of this list and a BSD newb,
coming from Linux background. I have a few DELL boxes running FreeBSD in
need of memory and I need to show them some love by adding more RAM to the
existing 4 Gigs they have.  I tried recompiling kernel with PAE, but it
seems to have compatibility problems with SCSI controllers.  The boxes in
question use LSI MegaRaid.

dmesg:
[snip]

amr0: <LSILogic MegaRAID 1.51> mem
0xd80f0000-0xd80fffff,0xdfdc0000-0xdfdfffff irq 46 at device 14.0 on pci2
amr0: <LSILogic PERC 4e/Di> Firmware 516A, BIOS H418, 256MB RAM

[snip]

amrd0: <LSILogic MegaRAID logical drive> on amr0
amrd0: 139760MB (286228480 sectors) RAID 5 (optimal)
ses0 at amr0 bus 0 target 6 lun 0
ses0: <PE/PV 1x6 SCSI BP 1.0> Fixed Processor SCSI-2 device 
ses0: SAF-TE Compliant Device

[snip]

uname -a :
FreeBSD hostname.tld 6.0-RELEASE FreeBSD 6.0-RELEASE #0: Thu Nov  3 09:36:13
UTC 2005     root at x64.samsco.home:/usr/obj/usr/src/sys/GENERIC  i386


I have spent several hours googling for answers, but could not find anything
that would make me confident enough to follow.  I would prefer to keep BSD
on all machines, but if I can't help the box running MySQL with more RAM
soon, I will have to move it to Linux - it is really suffering.  I was
wondering if someone could shed some light on the problem and point me in
the right direction.

Thanks,
Matt