Could not unmount disk error -- Help!

[GoogleCodeExporter]

What steps will reproduce the problem?
1. I follow the steps to make the patchstick
2. I get an error "Could not unmount disk" 
3. Repeat

What is the expected output? What do you see instead?

This is the error message I get:

"2Z694-5660-029.dmg selected
Creating USB Flash Disk...
  umount_disk settling delay (10 seconds)
  partition the target disk
Unable to partition device: Started partitioning on disk disk1
Creating partition map

Partitioning encountered error on disk disk1: Could not unmount disk (-10000)
Could not unmount disk for zeroing
  partition_disk failed
Failed! (0:00:13)"

What version of the product are you using? On what operating system?

I'm using atvusb-creator-1.0.b10
The dmg file I'm using is 2Z694-5660-029.dmg
My OS is 10.5.8
I'm using a Sandisk 2GB cruzer

Please provide any additional information below.

I've tried 4 different USB sticks and 2 different Macbooks and same thing 
happens

HELP!

Original issue reported on code.google.com by rsteckl...@gmail.com on 23 Dec 2009 at 11:56

[GoogleCodeExporter]

Here are a couple of things to try:

I note your USB is a Sandisk. I am presuming this is bundled with U3. Get rid 
of it 
as it interferes with the patchstick process. It messes up the partitions.

Try restoring your Apple TV and trying again. The issue may not necessarily be 
with 
your USB.

It can be difficult to remove U3 fully on a Mac. You could try using the 
Windows 
version of the patchstick creator which may help in this instance.

Let me know how it goes.

Original comment by Sam.Nazarko on 24 Dec 2009 at 4:26