• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 470
  • Last Modified:

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 ?
0
egascho
Asked:
egascho
  • 3
  • 3
1 Solution
 
LucFCommented:
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
 
LucFCommented:
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
Get free NFR key for Veeam Availability Suite 9.5

Veeam is happy to provide a free NFR license (1 year, 2 sockets) to all certified IT Pros. The license allows for the non-production use of Veeam Availability Suite v9.5 in your home lab, without any feature limitations. It works for both VMware and Hyper-V environments

 
chicagoanCommented:
glad to have weighed in
0
 
LucFCommented:
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

Featured Post

Concerto Cloud for Software Providers & ISVs

Can Concerto Cloud Services help you focus on evolving your application offerings, while delivering the best cloud experience to your customers? From DevOps to revenue models and customer support, the answer is yes!

Learn how Concerto can help you.

  • 3
  • 3
Tackle projects and never again get stuck behind a technical roadblock.
Join Now