Hello, Currently we are using TSM 6.1 to do NDMP backups of our EMC Celerra. We are getting no de-duplication results from these backups. I'm wondering if it is because the celerra is already sending a compressed image snapshot file to TSM and TSM just doesn't de-dupe a file like that. We're thinking about going to a more traditional backup method for NDMP backups (going with weekly incrementally, and monthly fulls...etc) however it would be good to understand why this is happening. I find it a bit strange because we still do file-level restores just fine...
If someone could educate me a bit more that would be great for piece of mind! Thanks! Brian P. Boyd Sr. SAN Admin DUKE - OIT boydbria (at) duke (dot) edu
