I recently purchased my Z2 with the express intentions of upgrading to the Z3 software. With the exceptional help of this forum I performed the upgrade with little difficulty. I tried the upgrade on 2 separate drives, an older toshiba 40g and a new hitachi 160g drive. The older drive has had no problems at all, a perfect upgrade. The hitachi 160g drive upgraded properly, but has the reboot problem every few minutes. My suggestion would be to find an older, smaller drive for this. I guess i got a little greedy for space for music storage .

I'm wondering if anyone has tried to create a larger partition on a big drive, before restoring the avic image, so that the avic music partition is limited to the remaining space on the drive, basically cutting off a section of the drive. Or is the reboot problem caused by the increased drive speed, not the drive size?

Only Toshiba HDD have been proven not to reboot. It's not the size doing it, although I do not recommend a music partition bigger than about 40gb.