Backup Exec 2010 R3 getting zero compression
I have a site ehere the compression ratio appears to have dropped to Zero and is now over running the tape. 2 weeks ago we were getting 1.2:1 now it is reporting 1:1 and the quantity of data backed up seems to agree with these figures. The device is an LTO 3 (HP in a ML350 G6 wis SBS2011)
I have run a scsi trace and can see that bacup exec is sending a scsi compress at the start of the job.
I have created some highly compressible files as per technotes and when I back these up I get 47.7:1 compression so comression is working.
If I backup 6GB of XLS files in one directory I get zero compression.
If I put 2GB of highly compressible files in the same directory I get 1.3:1 compression so compression is working
If I zip the 6GB directory I get a 4.5 GB zip file so the XLS in native are quite compressable.
The whole server is an average SBS2011 with an additional LOB server running 2008. I am trying to backup approx 450GB to an LTO3 (400/800) drive so am a bit annoyed with this.
Product is fully up to date (SP4) backups are running at about 730MB/min which I am finding to be about average as system state backups drag this figure down.