Hi. we recently migrated our netbackup enviorment over to new hardware.. everything has gone smooth.. the catalog recoveries etc were very fast..
on the first few days the catalog backup ran at around 76mb/sec.. however over a number of daya the catalog backup has lost almost 20mb/sec speed.
this is the waits that occured on the day it ran at 76mb/sec
If your Backup catalog is done during a low period activity is aldready a good thing.
If you can, could you test a catalog backup on tape for test; Your LUN is perhaps hight in IOs and speed slow down ?