Help required regarding backup Compression
Hi I am using BE 2010 R3 and I have HP 1/8 G2 Tape Autoloader (http://h10010.www1.hp.com/wwpc/us/en/sm/WF06a/12169-304612-82176-82176-82176-3319912.html)
I use HP 1.6TB LTO tapes.
Compression Type has been selected as "Hardware [if available, otherwise none]" under Tools--Options and also in the properties of Weekly backup job.
Looking into last 3 months our Weekly full backup is between 1,852,309,119,510 bytes to 1,946,504,729,824 bytes. Weekly backup used to fit into 2x1.6 TB tapes when backup was 1.9TB or 1.94TB or 1.85TB data But sometimes even when backup is 1.87 TB or 1.91 TB the backup is taking 3x1.6 TB tapes. Like this weekend it was 1.85 TB and it took 3 tapes. No settings or configurations has been changed in the BE So is this normal ?
Tape1 - 1:1
Tape2 - 1.2:1
Tape3 - 1:1
Tape1 - 1:1
Tape2 - 1.3:1
About 1.2TB of data are audio/video/office docs/pdf which doesnt change whereas rest of the data are Server's C: drive, Servers System State/Shadow copy components, 8-10 SQL databases, few gigabytes of office docs/pdf that gets updated regularly.
Any help would be much appreciated, thank you.