Wandboard SATA Boot

[ctag]

Hi,

Per the directions on the Wandboard blog, http://wandboard.org/index.php/50-20131017-wandboard-sata-boot, I'm trying to boot my wandboard quad fully from a SATA drive.

I've followed the default instructions to format the drive, extract the rootfs, and write the u-boot image as outlined on the wandboard page, http://archlinuxarm.org/platforms/armv7/freescale/wandboard. So the ssd is configured as though it is an sd card.

I can place "mmcroot=/dev/sda1" in /boot/uEnv.txt of an sd card (also setup with arch) and the system will boot with the filesystem from my ssd.

However, when I re-soldered the resistors, the board fails to boot. The green LEDs will come on, but nothing is output to HDMI, and I don't own a serial connector to check for the u-boot console. I'm confident that the soldering is correct, but otherwise don't know how to verify it.

Is it possible a line such as "mmcroot=/dev/mmcblk0p2 ro" is keeping the system from booting off SATA? How can I go about reconfiguring the u-boot that is paired with arch? I'm aware of guides such as that on eewiki to compile u-boot.imx from a patched git branch, but I don't know the differences between the resulting image and the archlinux one.

Thanks,
-ctag