Hi
Not being able to giveback is most often related to not knowing how and where to do the giveback. And sometimes it is because the failed partnernode is not in "Giveback" mode.
FW upgrades can be done on the System Console prompt.
netboot needs a "netboot kernel" locatable on a tftp or http server, and then use a sysntax like this...
Here is a good write-up (googled it):
http://www.wafl.co.uk/netboot-a-netapp/
Peter