Storage Boards Cleanup
To make it easier to find information about HPE Storage products and solutions, we are doing spring cleaning. This includes consolidation of some older boards, and a simpler structure that more accurately reflects how people use HPE Storage.
Tape Libraries and Drives
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DLT4 compression

David Vincent
Occasional Contributor

DLT4 compression

I want to compress the data when i'm doing a backup but the compression light always light off. But when i passed the Hp tools the 2:1, 3:1 and 4:1 compression test pass. I use windows 2000 and the windows 2000 backup software

thanks
4 REPLIES
Eugeny Brychkov
Honored Contributor

Re: DLT4 compression

If there's no button on the tape drive to turn compression on then try doing it with backup utility:
ntbackup /hc:on
Eugeny
David Vincent
Occasional Contributor

Re: DLT4 compression

yes there's a button...the compression light is on, but when the backup start the light goes OFF
Eugeny Brychkov
Honored Contributor

Re: DLT4 compression

Then explore your backup application to find out where to set it not to disable compression!
Although this application could be so clever to turn off compression for backing up already compressed files... But if it's windows NT backup then use this key '/hc:on'
Eugeny
GK_5
Regular Advisor

Re: DLT4 compression

Is it a brand new tape or tape used in other drive or by other software. Sometime if tape is used in other drive or software the new drive/software can not recognize the old format and ignores the compression. I have seen it in Veritas Netbackup.
IT is great!