Hello, I've just installed FreeBSD 9.0-RELEASE using GPT on /dev/ada0on my Dell Latitude c840. After setting up GPT manually using the handbook as a guideline and rebooting, I get the following message prior to the BTX loader: Code: gptboot: invalid backup gpt header The system boots properly, and I see no apparent ill effects. [CMD="gpart show ada0"][/CMD] Code: => 34 312581741 ada0 GPT (149G) 34 1024 1 freebsd-boot (512k) 1058 4194304 2 freebsd-ufs (2.0G) 4195362 8388608 3 freebsd-swap (4.0G) 12583970 8388608 4 freebsd-ufs (4.0G) 20972578 8388608 5 freebsd-ufs (4.0G) 29361186 283115520 6 freebsd-ufs (135G) 312476706 105069 - free - (51M) I looked at a previous thread (http://forums.freebsd.org/showthread.php?t=30231) except there the system would not boot, and it was marked as solved when the error message is still visible. One of the earlier suggestions was to use dd to remove any possible remnants of an MBR or other GPT partition data. I used DBAN to zero out the drive and did a fresh reinstall, and the invalid header message is still visible when booting. Someone else in that thread had mentioned running the following: # gpart recover ada0 and I get a message stating "ada0 recovering is not needed". Code: FreeBSD babylon 9.0-RELEASE-p3 FreeBSD 9.0-RELEASE-p3 #0: Tue Jun 12 01:47:53 UTC 2012 email@example.com:/usr/obj/usr/src/sys/GENERIC i386 dmesg output: http://pastebin.com/YheRNjLc The only item that has been added to /boot/loader.conf is a line accepting the iwi0 firmware as specified in iwi(4). Any suggestions? This is a fresh setup, I've got nothing to lose, and I'm willing to try just about anything. I'm relatively new with FreeBSD and the last time I used Linux was ages ago, but I'm willing to read man pages, documentation, and follow directions. Thanks for your time.