Xoom WiFI Honeycomb 3.1 Mount failures

I have a rooted Xoom WiFi with Honeycomb 3.1. Used both the README and ReL1K's blog. I know what commands throw the errors. I don't know enough to get the answers from google.

Everything appears to be working correctly until I get to "sh bootBT" (yes I did run su and the ungziped 5 GB img file is in /sdcard/BT5)

I get two "mount: I/O errors" which I tracked down to the following mount commands:
mount -t devpts devpts $mnt/dev/pts
mount -t sysfs sysfs $mnt/sys

total output (not surprised with the chroot error with the previous mount error:

mount: I/O errors
mount: I/O errors
net.ipv4.ip_forward=1
chroot: can't execute '/bin/bash'" Input/output error
Shutting down BackTrack ARM for Xoom
failed.
failed.

I'm assuming the "failed" erorrs are from unmounting dev/pts and sys.

Any pointers or suggestions?

the errors are not at unmounting but on mounting ...

can be confirmed coz after errors we see ip_forward=1.

do check if you have busybox you are su and your /data is writable.

Similar errors here with honeycomb 3.1
after typing the line - sh bootbt , I get several "mount no such file or directory" errors.