Netbackup-compression of backup on tape (h/w level)
We regularly take backup for SAP systems, recently i faced some abnormal behaviour..
The policies configured 1 year ago are able to compress backup h/w level(tape drive level), but when i configure new policy with all parameters same... it is not able to compress
old policies can write 1.5 Tb data on single tape (IBM LTO 4 tape 800/1600Gb) , new policy is barely able to write 800Gb.
what is wrong with me ... even if i copy old policy to create new ..it wont compress.
what is the issue and the solution if any one have solved this issue....
on old policies software level compression is not enabled and still it compesses perfectly but new r not..???