I have the most up-to-date configuration of Feisty Fawn. Every time I try to create an iso-image of a data CD I have, something I do through GnomeBaker, although this doesn't seem to make any difference, it fails with the following error:

Error trying to open /dev/hda exclusively (Device or resource busy)... retrying in 1 second.
Error trying to open /dev/hda exclusively (Device or resource busy)... retrying in 1 second.
Error trying to open /dev/hda exclusively (Device or resource busy)... retrying in 1 second.
Error trying to open /dev/hda exclusively (Device or resource busy)... retrying in 1 second.
Error trying to open /dev/hda exclusively (Device or resource busy)... giving up.
readom: Device or resource busy. Cannot open '/dev/hda'. Cannot open SCSI driver.
readom: For possible targets try 'wodim -scanbus'. Make sure you are root.
readom: For possible transport specifiers try 'wodim dev=help'.

Someone can please suggest the solution for this?

Gnomebaker is a great program. But when you put the cd in the drive and the pop up window comes up, cancel it. Right click on the cd prog icon on the desktop and choose the copy cd command. That's how I made a copy of the 7.10 iso download, prior to installing it. No need to enter an intermediary program to do the job. Works great.

A how-to from Ubuntu...
https://help.ubuntu.com/community/CdDvdBurning

Cheers.