It works. Today I moved my homebrew EHD from one 211 to my other 211 and after it rebooted up it worked just fine. All my recorded programs were there and I was able to access them. I then moved the Maxtor EHD from my second 211 to the first one and it also came up just fine. Removing or turning off the EHD causes the 211 to reboot which takes a bit of time since it for some reason has to find the satellites again and then download the program guide. Then putting the other EHD it also goes through this process again so moving an EHD isn't an instantaneous process.