OK, we know the original works fine. I never heard of a rebooting issue when the z1 image. So what happens when you use the same drives that were rebooting with a z1 image. If it's a hardware issue, shouldn't they reboot on a z1 image? and if it is only on a z2 image, then what is demanding the greater power. just a couple of questions for thought to maybe help out.
So, I got a Z1 image last week. Turns out a buddy of mine had the Z1, bought the Upgrade DVD and wanted me to help him upgrade the sucker. Talk about perfect timing. Paid the $40 to unlock his drive and now I have a well used Z1 image for testing.
First thing I did was do a copy to my 7200rpm Seagate drive and pop it in my Z2. After the firmware upgrade, err, downgrade, it booted up fine and the testing began. Ripped a CD while driving around and using the Nav (Z1 maps suck BTW haha) and lo and behold the thing rebooted. On the drive home it locked up once (had to stop the car, shut it down and turn it back on to get the thing to respond), and later on it rebooted again. So ya, every 15 min reboot, same as Z2. So, the difference between Z1 and Z2... the Z2 always reboots on a problem. The Z1 will lock up or reboot when a problem occurs.
Now, I found a whole whack of HDD's at work from old retired laptops. Here's what I have, with power draw numbers:
Manufacturer, Model, Size, RPM, Seek, Read, Write, Standby, Idle
Seagate ST910021A 100GB 7200RPM 2.6W ???W ???W 0.26W 1,30W
Seagate ST9100823A 100GB 5400RPM 2.3W ???W ???W 0.20W 0.99W
Fujitsu MHT2060AT 60GB 4200RPM 2.3W 2.0W 2.1W 0.25W 0.65W
Toshiba MK4025GAS 60GB 4200RPM 2.6W 2.3W 2.3W 0.25W 0.90W
Stock Drive Power Consumption:
Toshiba MK3029GACE 30GB 4200RPM 2.3W 2.0W 2.0W 0.25W 1.00W
After testing these drives, I should have a clear answer if the problem is a power draw (too high) problem causing the reboots, or if the Z2 has a security check to only use Toshiba drives.
If the Fujitsu works fine, it's a power draw issue. If the Toshiba MK4025GAS 60GB works fine, it's a security check, since it uses the same amount of power as my 7200rpm drive, which reboots quite often.
Hopefully will have answers in a few days...