1. From some forum searches, I noted the closed thread http://ubuntuforums.org/showthread.p...ive+filesystem , but nothing there helps.
2. When trying to boot into a live image of 12.04.3, I get this message ( "unable to find a medium containing a live filesystem") and the boot sequence stops.
a. Image on a DVD.
I have both a DVD read/write drive and a CD-ROM drive. This is the first time I've tried to boot a live image from a DVD rather than a CD-ROM. I've gone into the BIOS and tried every order of boot sequence.
dmesg indicates that it finds the two drives (/dev/sr0 and /dev/sr1). The error message is from initramfs and says it can not find a live image.
b. Image on a USB key.
I created the image using my current install (10.04) "Startup Disk Creator".
In the boot-up process it dumps out again into busy box with the same error message (unable to find a medium containing a live filesystem).
I was able to figure out that the image is on /dev/sdb1 and was able to mount that. However, I can not figure out how to continue the boot-up process or get it to realize that the image is there.
c. When 12.04 first came out and fit on a CD ROM, I was able to boot that. However, I didn't install it at the time.
3. Additional Information:
The image I'm using is ubuntu-12.04.3-desktop-i386.iso . I verified the MD5 hash.