Install GNU/Linux No System Disk Error -- HP Smart Array

I have a HP Proliant DL360 g5, and am trying to install archlinux. It has a HP Smart array controller with 6 drives (all green) creating two logical volumes (one volume with 5 RAID6 drives, and the boot volume with one RAID0). I used the ORCA (array configuration tool) to select the smaller volume as the boot volume. I installed archlinux (using pacstrap, and the Installation Guide), and I created a single GPT partition (ext4), installing syslinux and its BIOS bootloader (https://wiki.archlinux.org/index.php/Syslinux#Installation). When I reboot, Proliant says "Non system disk or disk error". I also tried setting the other volume as the "bootable" volume (in case I had chosen the wrong one), but this didn't help.

Is GPT+BIOS+Syslinux a viable booting strategy on this server?

My reading suggests that the server is incapable of EFI/UEFI booting, so I'm pretty sure MBR/BIOS installation is correct.

The simplest solution is to use grub. Syslinux was designed primarily to boot from media other than hard drives, and while it technically can be made to boot a hard drive, it's not even the default bootloader (grub is), and probably has little or no support for GPT.