Preparing USB Memory Stick for Booting 12.04

[walt11]

I've been following the instructions "Preparing Files for USB Memory Stick Booting" in the Ubuntu Official Documentation for 12.04, and I'm using the "Copying the files — the flexible way" method.

I've prepared the memory stick as per instructions, booted from it OK, and the installation begins. When it gets to the step of looking for an installer ISO image, it finds my downloaded file ubuntu-12.04-desktop-i386.iso, accepts it, and attempts to read it. I get the error message:

There was a problem reading data from the CD-ROM ...

Retrys do not help. I know this is a good file because I've used it to burn a CD, and booted with that CD. I tried saving error logs, but that step failed also.

Any suggestions on how to proceed? Thanks.

[mörgæs]

Have you tried creating the USB stick with Unetbootin?

[walt11]

Thank you! Unetbootin looks like just what I need.

[mörgæs]

Good. If it worked please mark the thread 'solved'.

[walt11]

Unetbootin created the USB stick with no apparent problems, but when I tried to boot from it, all I got was "Boot error". I tried using install-mbr on it, but still got the boot error. Then I tried using Boot Repair, which reported that it had successfully repaired the MBR, but still get the boot error. Not sure how to proceed from here.

[mörgæs]

Please give a complete hardware description.