Email Subscription Notifications Suspended Temporarily
We are in the process of making navigation in the Servers and Operating Systems forums simpler and more direct. While doing this, we have to temporarily suspend email notifications for subscriptions. If you are subscribed to one or more discussion boards or blogs in the community, please check them daily to see new content. Notifications will be turned back on in a few days. We apologize for any inconvenience this may cause. Thanks, Warren_Admin
StoreEver Tape Storage
cancel
Showing results for 
Search instead for 
Did you mean: 

Tape drive compression ratio

SOLVED
Go to solution
Bill O'Brien_6
Occasional Contributor

Tape drive compression ratio

I have a compaq 40/80 tape drive and arcserve software. I already asked arcserve support which was better - hardware or software compression. They stated hardware compression is better and that with hardware compression enabled software compression is off - which is my current configuration. My compression ratio is 4.45 - is this ratio adjustable and if so how??
3 REPLIES
Sunil Sharma_1
Honored Contributor
Solution

Re: Tape drive compression ratio

Hardware compression ration is not adjustable. Compression ration depends on the type of data you are backing up. It vary with the type of data change. Hardware compression either can be on or off there is no other choice. This can be acheived by DIP switch/Jumpers.

Sunil
*** Dream as if you'll live forever. Live as if you'll die today ***
Marino Meloni_1
Honored Contributor

Re: Tape drive compression ratio

Dave Wherry
Esteemed Contributor

Re: Tape drive compression ratio

Another factor besides the data being backed up is the quality of the media and how clean the tape heads are. You can back up the same set of data to the same device and get radically different compression ratios with different media.
Even brand new tapes come out of the factory with some residue on them. That will eventually come off on the tape head. That gets removed with the cleaning cartridge. Over time the cleaning cartridge degrades the quality of the tape head. With use, the tapes degrades. The ratio will change.