Hi All,
i have a fully patched backup exec 2010 R3 running against a HP 1/8 G2 LTO-4 Autoloader.
Compression is enabled in the Job and on the device, and the job summaries state that compress is being used.
The issues, is that even though the above is true, the jobs writing to tape are recording values with a 1:1 compression ratio
For Example - a server backup job (Windows 2008 R2, Systemstate, full C drive) will report as 1:1 compression ration, with 21GB of data written to the tape, but using 31GB of the Tape capacity.
This is amplied when running Veeam backup data to the tapes, as we get the same 1:1 compression value, and only about 400-450GB on data on the tape (although Tape Reports as full). My full weekly Veaam backup is approx 3.2TB so it it should require no more than 4-5 tapes to complete, but presently it uses all 7.5.
HP LTT reports compression enabled and working,with an effective compression of 2.61:1 during the test.
changing the Job to HW compression, then software if not available makes no difference to the results.
I have several other servers\jobs etc with the identical configuration to both LTO-4 / LTO-5 autoloaders and don't see the same issues.
Have tried new and old tapes, drive and autoloader firmware is current @ 10/713 and we've even rebuilt the backup server just in case.
Can anyone offer any suggestions as to why this might be the case on this particular system?
Regards,