DDS4 only backups 30Gb

[timwescott]

I have a DDS4 drive that only backs up 30Gb of data. Anything over 30Gb and Veritas v8.6 asks for another tape.

The DDS4 was a replacement for a DDS3. The system drivers were updated, Veritas drivers updated.

Further information can be supplied if required.

 

[Zelandakh]

what do you think the capacity is?

 

[timwescott]

Cracked it. To achive 40Gb the system would need to use 100% compression, which is unlikely. It's down to what type of files the system is trying to compress. We have a large number of CAD file that probably don't compress well.

Thanks
Tim

 

[Zelandakh]

Which was why I asked the capacity. You have a 20/40 drive but are only getting 30GB. Yup, that's normal...

 

[jliew]

Does anyone know why Seagate DDS4 tape can back up over 52G, but other brands DDS4 tapes like Sony and Imation can back up only less than 29G? I have many cad files that explain the high compression ratio. My tape drive is a Seagate Scorpion 40 running Veritas v8.6 Small Business Server edition.

 

[jliew]

Please ignore my previous post. The outrageous 52G claim was wrong.