Thanks jjeff for your comments. I have always used RAM disks but I find they tend to get, I can only use the word 'corrupted' and unusable after a few months and as they are more expensive than -RWs I thought I would try them in place of the RAM, I always use -RWs for my my every day recording or DVD-Rs if they are to be kept. So far all seems well the offer of erasing single titles or all titles is there the same as the RAM, so when I've finished my weekly programs I will format the disk as you seem to be happy with that.
Completely off the topic, do you or anyone reading this thread know how you can add a product you use in your profile? I enter my DMR-ES 30 VEB into the search as instructed it comes up with several models but not mine and there doesn't seem to be any way to add yours to the list, very frustrating.
Thanks for giving me your comments and your help.