Compression on Backup Exec 12.5
We are currently running Symantec Backup Exec 12.5 SP2 on Windows Server 2003, and our compression ratio on our D2T backups is currently sitting at 1:1 or in some cases ranges at 1.5:1 (screenshot 1), as you can see from the screenshot, some of our tapes are running out of space, and with our backups increasing from week to week, we're trying to compress the data on the tapes (HP Ultrium 4 tapes = http://www.frontierpc.com/ProductImages/Large/1010815445.jpg) which as far as i can find, can handle compression. All our jobs have compression turned on (screenshot 2), but after following these instructions from Symantec = http://seer.entsupport.symantec.com/docs/287662.htm the Tracer program shows that the backups are NOT compressed (screenshot 3). Anyone have any ideas how i can go about compressing the B2D portion of our backups?
FYI we backup about 12 servers, from policy they backup to tape, and then we run a duplicate to tape.
Backup-Screen1.JPG
Backup-Screen2.JPG
Backup-Screen3.JPG
FYI we backup about 12 servers, from policy they backup to tape, and then we run a duplicate to tape.
Backup-Screen1.JPG
Backup-Screen2.JPG
Backup-Screen3.JPG
to make sure your tapes are being used to its full compression capability, make sure each tape is correctly identified by type in BE
Right click on one of the tapes in the media set, select properties and click the button next to Media Type. There will be menu's to select which type of tape it is.
Right click on one of the tapes in the media set, select properties and click the button next to Media Type. There will be menu's to select which type of tape it is.
In BE, Devices, Right Click on Drive Name,
Properties
Configuration
Is Compression Enabled?
I had to reset mine to:
32k
32k
10
1
Uncheck ALL boxes
Properties
Configuration
Is Compression Enabled?
I had to reset mine to:
32k
32k
10
1
Uncheck ALL boxes
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If you are backing up large amounts of files such as jpegs, zip files, mp3's or other already compressed media, your success will be little.
The compression capability advertised on the tapes and your backup systems are completely theoretical, and more often than not are impossible to reproduce even in perfect conditions. I wouldn't bet on compression capacity for planning your backups.
You also have to see what your Tape library is rated for as well.