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Can Not Get Compression!


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I am unable to get compression when I backup. I am running Retrospect 6.0.204 with the most current driver, on a Mac running OS10.3.7. A couple of days ago I created a new backup set to backup a client on my LAN. For the compression settings "Immediate Backup - Options - Backup" I have a choice of checking or not checking "Data compression (in Software)". So I checked this option. It says that this option will be disabled if the storage device uses hardware compression. Now I do not see a place to disable hardware compression as was suggested to me last fall. For compression filters I have "All Files" selected. But when I ran this backup I was only able to put 12gb on a 12gb tape. I am backing up my entire computer, so there are a mixture of file types. My tape machine is a HP DAT DDS-3. Am I missing something? How can I get compression? Mostly, I want to be able to backup everything without having to switch tapes, and compression would allow for that most of the time. Any assistance you can offer will be greatly appreciated.

 

Charles

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It says that this option will be disabled if the storage device uses hardware compression

 


 

If your tape device is reporting to Retrospect that it will be compressing the data, then Retrospect will disable its own software compression.

 

But what if the tape drive is lying?

 

Retrospect has no control over the drive's compression settings. That would be handled via whatever interface the drive provides (usually some front panel buttons). That's where you should be looking.

 

Dave

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Retrospect has no control over the drive's compression settings. That would be handled via whatever interface the drive provides (usually some front panel buttons). That's where you should be looking.

 

Dave

 


 

Dave,

 

That is a good point, one that I didn't think of. However, I can not find any settings for compression on the drive itself (HP SureStore DAT24). Possibly there are jumpers inside the unit, but the documentation does not say. I will continue to check on this.

 

Thanks

Charles

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