I am having the IBM LTO 4 tape drive and also have 800GB cartridge. Total data size for me is about 60 GB per day and I am using different tape for one week. Ok….so here goes the issue...when I make use of the free tape for the data backup on Sunday then there is no problem with that and it is working well. But when I make use of the same tape after a week then DPM is not even detecting the cartridge. I have already tried by co-locating but that makes no difference in this. Can somebody over here guess that what could be the problem with this and how that can be resolved? If you have any helpful information then pleases post that as soon as possible. I will be thankful for all the information on this.