Why would brand new LTO3 tapes hold less and write/read slower than old tapes in current inventory?
Posted on 2011-02-10
I'm using Backup Exec 11d (Rev 7170, HotFix 37, Svc Pk 5, HotFix 70 using BE drivers) and a Quantum Superloader3 w/ Quantum drive (ver 2181). All new media (Quantum and Fuji) I use will give me "Media Full" between 232GB and 308GB while media created in 2009 will get 'full' between 438GB and 496GB backing up the same data using the same jobs. My weekend backup (just over 1TB) should be using 3 tapes and now is up to 5. One of my nightly backups typically (on old tapes) runs 4 hours. Last night on new tapes... 7 hours 20 minutes which ran over my next backup job start time. I have xTalk logs for Device Health and write/read full tape on a 'New' tape. I need to run write/read full tape on an old tape for comparison.
Any help, greatly appreciated. Thanks.