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No compression on Dell PV-100T DDS4 drive

Posted on 2004-09-27
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Last Modified: 2013-12-01
Hello -

I have a Dell PV-100T DDS4 20/40 tape drive and Veritas Backup Exec 9.1 for Small Business Server Premium. The OS is SBS 2003 Premium with current service packs and updates. I back up a combination of Exchange and SQL databases, System State, and user documents. Hardware compression is enabled on the tape drive. The drive firmware and the Veritas drivers are current. No matter what type of compression is enabled in the Veritas software (Hardware otherwise software, Software) all I get is a 1:1 compression ratio on the tapes.

Any ideas?

Thanks!!!

Steve B.
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Question by:sboegeman
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7 Comments
 
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Expert Comment

by:CodeDevWiz
ID: 12165998
Are you using compatible media.  I would check the Veritas website to check this.
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LVL 2

Expert Comment

by:PAR1033
ID: 12166543
Try disabling the hardware compression on the drive, and run software compression only.  
(The hardware compression may not be supported properly, and while on is preventing the software compression from running.)
The software compression should be internal to the software.  
You did not mention how much RAM you have.  You might check the required and recommended amount of RAM for your equipment, OS, and configuration.  If there is not enough RAM to run the software compresssion, it also might ignore your request for compression.
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Expert Comment

by:Cyber-Dude
ID: 12167569
Do the following:
Enter the Backup process properies and go to the 'Setting' section => At the 'General' tab you have an option "Compression Type" => Choose: "Hardware (if available, otherwise software)" => 'Submit'...

This is it.

PS

You may take in-mind that data is not always compressable...

Cyber
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Author Comment

by:sboegeman
ID: 12266674
Thanks to all for your halp on this. I think that this is a Veritas software issue. When I run the backup and let it fill the tape I get about 25 GB, or 25% compression. The Veritas software is not reporting any compression. Thanks to all!!
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modulo
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