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C7497A DDS4 - No Hardware Compression

Rob Marles
Occasional Advisor

C7497A DDS4 - No Hardware Compression

I am using a C7497A on an HP9000 D class server running HPUX 11.0.

I cannot seem to get better then normal native compression ratios through my DDS4.

I know that the data is compressable - I have a DDS3 (12/24) that gets the 21GB of test data I have set up, but the DDS4 cannot.

please advise, thank you in advance!
4 REPLIES
Eugeny Brychkov
Honored Contributor

Re: C7497A DDS4 - No Hardware Compression

Check dip switch settings at the bottom of the drive - all on except 3rd is off. Check drive's health and compression status with HP LTT http://h18006.www1.hp.com/products/storageworks/ltt/index.html . Run compression test
Eugeny
Rob Marles
Occasional Advisor

Re: C7497A DDS4 - No Hardware Compression

Thanks Eugeny

HP Support told me the same thing - flip the 3rd switch to "off" seemingly no effect.

Rob Marles
Occasional Advisor

Re: C7497A DDS4 - No Hardware Compression

Eugeny - The page you listed has links to the various downloads - they do not work, FYI.

Thanks
Rob Marles
Occasional Advisor

Re: C7497A DDS4 - No Hardware Compression

Eugeny,

HP Has made the link available again. I have downloaded and installed this tool. It works great, thanks!