QUOTE(Bomb Bloke @ Mar 9 2010, 04:26 AM)

Certain bits of saved data (starting with everything you download from Live) are locked to the system EEPROM. Basically, to get access to those songs, you'll need to flash the new console's EEPROM chip with the backup you took from the old system.
Doh! Well, at least I've got the old and new eeprom.bin files backed up, and neither console is a 1.6. Hopefully one run of ConfigMagic is all I need.
QUOTE(Bomb Bloke @ Mar 9 2010, 04:26 AM)

Note that certain games will outright delete any badly-signed saved content they see (eg Halo 2). For all I know, your Karaoke game has already wiped your songs completely. Or maybe it's just ignoring them for now. Either way, I'd recommend backing up your UDATA/TDATA folders to your PC before playing any more games with this drive installed, so that you've got a backup in case things go much further wrong.
Did follow through with the backup after my little experiment; I dont think KR is one of those games, hope that's not just wishful thinking.
QUOTE(Bomb Bloke @ Mar 9 2010, 04:26 AM)

You'll also need to re-lock the old drive to use the old EEPROM's key again, of course.
Really? It isn't enough to have it unlocked with the security disabled (with a modchip)? I guess I'll see if I get a Code 6 or whatever when I try to run it, and won't put away the computer that works with xboxhdm till this is sorted.
QUOTE(Bomb Bloke @ Mar 9 2010, 04:26 AM)

If you stuff up the EEPROM write process, the new system won't boot (it'll give no A/V output and instead just blink a red LED at you), but your EEPROM reader can be used as a writer as well, so that's not all that much of a problem. Assuming you backup the new system's original EEPROM first.
My eeprom reader only existed for a couple of hours on a breadboard, so there's more incentive to avoid messing it up.
Thanks for the advice!