The server I just built does not have a cd drive. I want to install Ubuntu Server 12.10 The mother board in the server is a Gigabyte GA-H61M-USB3. I burned the image to a thumb drive and set up the BIOS to boot from USB (USB-CDROM setting). The installer launches and I am able to do the initial setup (language, keyboard, etc.) but then get a error that it can't find the cd drive. Can anyone help??
I faced a similar problem twice; the OS was booting just fine from USB but for some reason it was trying to load files from the CD-ROM.
The fist time I re-downloaded the image and burned into USB again and the second I followed the procedure mentioned here.
It doesn't sound like you made the USB drive bootable -- https://help.ubuntu.com/community/Installation/FromUSBStick