changing mac address on Pogoplug

[JJpogo]

Hello,
I was looking for a way to change the mac address on a Pogoplug. I found three methods:

1) Making the mac address change to the "uboot environment", suggested by http://archlinuxarm.org/forum/viewtopic.php?f=18&t=4766

2) Installing a program called "macchanger".

3) Using "Systemd": "ExecStart=/usr/bin/ip link set dev %i address xx:xx:xx:xx:xx:xx", suggested here https://wiki.archlinux.org/index.php/MAC_Address_Spoofing

It could be that macchanger and Systemd is changing the uboot environment so maybe all the mthods are the same, I don't know. But my question is with any of them, will the change stick with the Pogoplug device itself or with the USB flash drive? So, if I remove the flash drive and move it to another Pogoplug, will the mac address stick with the flash drive?

The last two methods are in the archlinux forum, I'm not sure how much they would apply (or even if they work) for alarm on pogoplugs. Maybe one method is better than the others, I don't really know the advantages/disadvantages of them. And I'm reluctant to try it in case the options 2 and 3 aren't intended for Pogoplugs.

[WarheadsSE]

uboot: device
others: stick