QNAP TS-209II make bootable fails

[John Roberts <johnr@iinet.net.au>]

I have tried to install Debian on to my QNAP TS-209II using the guided 
installation but the make bootable step has failed on several attempts 
despite keeping installed packages to a minimum.
I assume the flash size is too low for this to work for the current 
release but this is a non evidence based guess.

I can still login using the user installer with associated password and 
get the "ash" shell. Can anyone spell out how to make it bootable when 
the power switch is turned on?
On device #0 I have
#1 primary ext2 /boot.
#2 primary ext2 /
#5 logical    swap

Cheers, John