HI Steve,
We might have the drive that would be compatible with your machine. Can you please let me know what model and make you have currently installed (most likely it will be Pioneer or Plextor depending on the age of the unit)? Please note that it is necessarily to update the firmware of the drive after installation and also the drive needs to be properly aligned. Please note that we offer out of warranty repairs on Primera units (there is an evaluation fee of £60 + VAT to diagnose the fault for out of warranty repairs. You will then be sent a quote for the cost of repair. Should you wish to go ahead with the work, the evaluation fee will be removed from your bill (so you pay only for labour and any necessary components). Please let me know how you would like to follow.
Kind Regards,
Tom

Thank you for the quick response. Our unit has a Pioneer DVR-111D drive and is about 2yrs old. This is mainly an enquiry because we are intermittently getting "Internal recording engine error" and rejected discs. We have not changed any settings and our media is high quality so i can only think the drive may be on its way out. We will monitor the situation and if it persists i will raise another ticket. Many thanks