@jimp:
Not sure what it might be then. Is your BIOS up to date?
I have FreeBSD 8.1 amd64 (same as pfSense uses) installed on my workstation which boots from a 1TB drive and has 8GB of RAM. No problems at all. I don't have a spare 1TB drive to try pfSense on though. Some BIOS implementations won't boot from a partition that large.
Though my root (/) slice is only 2GB and I have slices setup for other things (/tmp, /var, /usr, etc).
I forgot to mention that in the first place i did suspected that the Bios not updated and i did update it , it didn't change the situation.
you suggesting to slice it acutaly i managed to install it with freebsd distribution cd and slice the disk into 4GB where all are installed,another 4GB EMPY ,rest of space also empty
then i installed it on the first 4GB with 2 November version i got.
i have question would it be issue to have only 4GB drive ,otherwise would it be possible to redistribute /tmp etc.. actual to other location without reinstalling?
Thanks