Specify boot sector location when installing?

Hello,

I have a 240GB RAID 10 array and a 60GB SSD for caching. When I install Proxmox to the RAID10 array with the SSD in the server, the boot sector gets written to the SSD because it is /dev/sda. The problem with this is the SSD is not redundant, if I lose the SSD the server will not be bootable. If I install Proxmox to the RAID array with the SSD out of the server, and add it later then the server fails to boot because the SSD takes the /dev/sda name from the RAID array and breaks the volume groups.

Raid card is a LSI SAS1068E

root@dragonfly:~# pveversion -v
pve-manager: 3.0-23 (pve-manager/3.0/957f0862)
running kernel: 2.6.32-20-pve
proxmox-ve-2.6.32: 3.0-107
pve-kernel-2.6.32-20-pve: 2.6.32-100
pve-kernel-2.6.32-22-pve: 2.6.32-107
lvm2: 2.02.95-pve3
clvm: 2.02.95-pve3
corosync-pve: 1.4.5-1
openais-pve: 1.1.4-3
libqb0: 0.11.1-2
redhat-cluster-pve: 3.2.0-2
resource-agents-pve: 3.9.2-4
fence-agents-pve: 4.0.0-1
pve-cluster: 3.0-4
qemu-server: 3.0-20
pve-firmware: 1.0-23
libpve-common-perl: 3.0-4
libpve-access-control: 3.0-4
libpve-storage-perl: 3.0-8
vncterm: 1.1-4
vzctl: 4.0-1pve3
vzprocps: 2.0.11-2
vzquota: 3.1-2
pve-qemu-kvm: 1.4-13
ksm-control-daemon: 1.1-1

Any ideas?

Thanks!

--Will