There are several possible causes for your problem. Without knowing what you are using (PC, drive, hard drive, software, recent changes, etc.) or how you are using it (external, multi-tasking, etc.), the following are several guesses:
- The drive may be bad or intermittent. Check the drive, cables, connectors, power, drivers. Clean the laser lens. Try another drive.
- check your system. You may not have have enough system speed or other resources to write with your drive at its current settings. Run some simple tests included with most common write software (Nero, Roxio, etc.). Make sure you have enough buffer space to prevent underruns.
- make sure your system is not the cause of overheating, underpowering or other seemingly unrelated causes. Check for background processes that might crash your drive. Temporarily turn off as many unnecessary programs as you can, such as anti-virus, office processes, networking, etc.
The fact that your drive worked in the past hints that something has changed.
Dell