Pogoplug V3 Pro boot with multiple drives attached (no replies)

So far, I have been able to successfully modify my uBoot on my pogoplug pro and boot into Debian. However, I am looking to use Netatalk to set up a network drive for my Macbook Pro to use as a Time Machine backup, and I have run into a problem where uBoot fails when I have more than one device attached to the pogoplug during the initial boot process. I suppose I can simply unplug all other drives whenever I need to reboot, but that is less than convenient, and was hoping there might be a way to automate the search for the correct drive on boot.

I have seen this post (http://forum.doozan.com/read.php?3,19093) which looks like it might accomplish what I am looking for, but the sample boot variables and the uBoot version look to be for the Kirkwood builds, not OXNAS. Is there a way to use the USB scan script on the pogoplug pro, and will that solve the problem of not being able to boot when multiple drives are connected?

fw_printenv output below:

autoload=no
baudrate=115200
bootargs=console=ttyS0,115200n8
bootcmd_stock=setenv autoload n; setenv bootargs_stock "root=ubi0:rootfs ubi.mtd=2,512 rootfstype=ubifs console=ttyS0,115200 elevator=cfq mac_adr=0x00,0x30,0xe0,0x00,0x00,0x01 mem=128M"; setenv poweroutage yes; setenv boot "bootm 60500000"; setenv bootcmd_stock_fw "run set_bootargs_stock; run boot_nand"; setenv boot bootm 60500000; setenv boot_nand "run load_nand boot || run load_nand2 boot"; setenv kernflmode s; setenv load_nand2 "nboot 60500000 0 800000"; setenv load_nand "nboot 60500000 0 200000"; setenv set_bootargs_stock "setenv bootargs $bootargs_stock"; setenv mainlinelinux no; run bootcmd_stock_fw
bootcmd=run dt_bootcmd_usb; run bootcmd_stock; reset
bootdelay=10
console=console=ttyS0,115200n8
dt_bootcmd_usb=usb start; run dt_usb_bootcmd; usb stop
dt_bootm=bootm $uimage_addr $uinitrd_addr $dtb_addr
dt_load_dtb=ext2load usb 0:1 $dtb_addr $fdt_file
dt_load_initrd=ext2load usb 0:1 $uinitrd_addr /boot/uInitrd
dt_load_uimage=ext2load usb 0:1 $uimage_addr /boot/uImage
dt_usb_boot=run dt_load_uimage; run dt_load_initrd; run dt_load_dtb; run dt_bootm
dt_usb_bootcmd=run usb_set_bootargs; run dt_usb_boot
dtb_addr=0x62c00000
ethact=mii0
ethaddr=00:25:31:01:02:0c
fdt_file=/boot/dts/ox820-pogoplug-pro.dtb
if_netconsole=ping $serverip
ipaddr=192.168.2.100
mtdids=nand0=41000000.nand
mtdparts=mtdparts=41000000.nand:14m(boot),-(data)
preboot_nc=setenv nc_ready 0; for pingstat in 1 2 3 4 5; do; sleep 1; if run if_netconsole; then setenv nc_ready 1; fi; done; if test $nc_ready -eq 1; then run start_netconsole; fi
preboot=run if_netconsole start_netconsole
serverip=192.168.2.5
start_netconsole=setenv ncip $serverip; setenv bootdelay 10; setenv stdin nc; setenv stdout nc; setenv stderr nc; version;
stderr=serial
stdin=serial
stdout=serial
uimage_addr=0x60500000
uinitrd_addr=0x60e00000
usb_device=0:1
usb_set_bootargs=setenv bootargs console=ttyS0,115200 root=/dev/sda1 rootdelay=10

I have tried simply adding the env variables from section A1 post listed above using netconsole, but see either messages like:

USB0:   USB EHCI 1.00
scanning bus 0 for devices... 4 USB Device(s) found
       scanning usb for storage devices... READ_CAP ERROR
EHCI timed out on TD - token=0x3c008d80

or

** Bad device usb 0 **
** Bad device usb 1 **
** Bad device usb 1 **
** Bad device usb 1 **
** Bad device usb 0 **
** Bad device usb 0 **
Wrong Image Format for bootm command

which makes me think that something about the script might need to change to work for the OXNAS boot process?