I managed to add a single 500GB Drive to an LS-WXL using TFTP Boot Recovery 1.53, got into EM mode, updated the Firmware using LS Updater with modified LSUpdater.ini file and got the single disk running fine. Whenever I try to add a second 500GB disk, The unit fails to boot and gives me a red error light 1 sec plus 0.5 sec. Have tried several drives, no joy. Remove second disk, no problem booting. Anyone know a fix for this? BW, Jeff