FreeNAS 8.0.4 x86_64 CD can be used with 64bit PCs.FreeNAS 8.0.4 is the latest update of the project's FreeBSD-based operating system which provides free Network-Attached Storage (NAS) services. Major changes are as follows: update ataidle from 2.6 to 2.72 based on maintainer's recommendation due to interoperability with 2.6 and certain chipsets; fix the inadyn port so that it works on i386; fix a regression for DHCP users where /etc/resolv.conf would be nulled out if DNS servers weren't specified in the GUI; disable AIO by default and change the default AIO read / write size to 4 kB; add in logic to start lockd and mountd when NFS is enabled so that FreeNAS doesn't need to be manually prodded to start the services, or rebooted in order for the services to become effective.
About FreeNAS
FreeNAS is a tiny FreeBSD-based operating system which provides free Network-Attached Storage (NAS) services (CIFS, FTP and NFS).