DDS-2 vs DDS-3 tapes -what is the capacity?

We have a "Compaq 12/24 GB DAT" tape drive on a server -model C1537A.  How much should we be able to put on one tape?

We use both DDS-2 and DDS-3 tapes.

We can't seem to put more than 5 gig on a tape before it asks for a second tape.

What does the 12/24 GB mean ?
egaschoAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Luc FrankenEMEA Server EngineerCommented:
1st, try formatting the tapes with your backup software.
2nd, set your backup software to overwrite data on the tape.
3rd, what kind of compression are you using? Hardware/Software/Both => if the answer on this one is "both" set it to hardware only, using more compression schemes sometimes causes files to get even bigger.

4th: >>What does the 12/24 GB mean ?
This means the tape supports 12 GB of uncompressed data and 24 GB of compressed data (the last one can't be reached normally, with a normal mix of files 17 GB is a nice amount of data to fit on only one tape.

Greetings, LucF
0
chicagoanCommented:
Note DDS-2 tapes have a 4GB native capacity, 8 gigs with compression on a good day, downhill with a tailwind.
0
Luc FrankenEMEA Server EngineerCommented:
chicagoan is right on that one:

Capacities (Uncompressed)
DDS1 -  60 Meter -  1.3GB (2.6GB Compressed)
DDS1 -  90 Meter -  2.0GB (4GB Compressed)
DDS2 - 120 Meter - 4.0GB (8GB Compressed)
DDS3 - 125 Meter - 12.0GB (24GB Compressed)
DDS4 - 150 Meter -  20.0GB (40GB Compressed)

So for your drive you should use DDS3 tapes to use the full capabilities of your drive.

LucF
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
The Five Tenets of the Most Secure Backup

Data loss can hit a business in any number of ways. In reality, companies should expect to lose data at some point. The challenge is having a plan to recover from such an event.

chicagoanCommented:
glad to have weighed in
0
Luc FrankenEMEA Server EngineerCommented:
chicagoan, I think you should have gotten some points......
egascho, do you agree if I post a "points for chicagoan" question?
0
chicagoanCommented:
lol - no problem he's up
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Storage

From novice to tech pro — start learning today.