Backups???

[Blade64]

I am a newbie so sorry if this seems promative. I am trying to backup my copy of the sims as it is quite scratched (BUT playable) Was wondering how to do it. I have Clone CD (I think it is 3) and try to copy. But it takes AGES and in the Log keeps sayin - Failed to read sector 811 etc. It worked perfect with other games - Can someone tell me the problem and how to overcome it!!!or just speed it up. If I leave it for hours will it backup!!!
Thanks
Blade64