USB Installation: Detect and mount the CD-ROM Failed?

[gzader]

I think I may have found an issue here.

I'm having the same issue with the cdrom. It's seeing the cdrom, it's mounted, but the files are bad. Looking in /var/log sys-something I found an error looking for:
/pool/main/l/linux/fs-secondary-modules-2.6.35-22-generic-di_2.6.35-22.33_amd64.udeb

The issue is the file in the ISO ends with .ude not .udeb If you look in the ubuntu iso dir:
/pool/main/l/linux/

You'll see the file:
fs-secondary-modules-2.6.35-22-generic-di_2.6.35-22.33_amd64.ude

So the installer cant find that file and it fails. I would guess that the cdrom installer knows there is a file name limit and the files match so it's all good. But with the USB stick not being a true cdrom, the inncorrect file name creates an error. Anyway, that's my guess so far.

--- update----
So I corrected the extensions for all files in that directory. Now it installs without issue.

[Sartavius]

Incorrect file extensions were exactly the problem for me. Not only did it solve the CDROM issue, but it took care of my network config problems as well! Thanks!

[shantanubhadoria]

This is wierd,
I had the same issue. I was installing ubuntu server 10.04 from a USB stick and geting the cdrom detect error. I unplugged the USB Drive and plugged it into a different USB port and it worked.
hope it works for others too.
Cheers!
-Shantanu Bhadoria

[Bruce0]

Also had same issue, install wanted the CD. But when I took the same image and created a USB stick instead of using a 100MB hard drive, it just worked.

Not sure if it is a bios thing or a installer thing.

Ubuntu 64 bit server 11.10

[Ahsaniqbalkmc]

I also had this issue. I followed @gzader's instructions and the error was gone. Just had to rename 5 or 6 files in the /pool/l/linux directory but it is still a pain, especially when you are a novice like me.

I hope ubuntu does something about it.