Dell 2950 HD not recognized

I have a dell 2950 poweredge with 4 serial attached SCSI cheetah T-10 (sas) 10k 15k RPM, I’m trying to do a fresh install, i get all the way to where i need to load third party drivers and it tell me that the drives are not bootable. I have tryed to install SCSI drivers as with PERC 5\i the machine has 2g RAM. all drives are working as they have gone through diags. any help would there be any mass storage device driver that i’m missing wanting to install HOMESERVER