cancel
Showing results for 
Search instead for 
Did you mean: 

using Deduplication with a tape library

John_Yassa
Level 4
Kindly advice how to use the Deduplication feature to backup our data on Tape Library
9 REPLIES 9

Ben_L_
Level 6
Employee
Deduplication is only available when backing up to disk not tape.

Colin_Weaver
Moderator
Moderator
Employee Accredited Certified

As far as I know you just run a duplicate job that is based on the original backup job  - be aware that the data on tape will be re-hydrated - so back to being a complete backup set.

John_Yassa
Level 4
could you kindly explian more

Ben_L_
Level 6
Employee

John,

I would suggest reviewing some of the documentation available for deduplication.  I have included a few links that should help out.

http://seer.entsupport.symantec.com/docs/342716.htm - Requirements for the Deduplication Option
http://support.veritas.com/docs/342717
- Deduplication methods for Backup Exec agents
http://support.veritas.com/docs/340834
- Best practices for Backup Exec 2010 Deduplication Option
http://support.veritas.com/docs/351982
- Deduplication Option White Paper

teiva-boy
Level 6
When leveraging Deduplication, your backup target must be an NTFS disk.  You cannot deduplicate to tape directly, at least not yet.

The reason for this is that, deduplicating to tape would increase your restore time, and potentially increase your failure rate to restoring data as tapes go bad more often than disk.

Restoring from a disk target is often faster in every which way possible, and with deduplication, if backing up 2TB of data, and saving to a 3TB volume, you could hold some 2 months of FULL backups to be able to restore from in seconds.  Try to go back to tape, which may or may not be in your library (find tape, recall from ironmountain, etc, then inventory)  Hopefully it's still in the catalog...   Then restore, but the restore job spans two tapes...  Not fun.

Ultimately, what is more important, backing up or being able to restoring?  Being able to restore directly from disk is the right answer.

John_Yassa
Level 4
what about open storage device , kindly correct me if i am wrong ,
the open storage device is a type of device where you can backup dedulication on it , as far as i know the open storage device can be a Tape library

teiva-boy
Level 6
Not quite.  An Open Storage device is a special appliance that integrates with BackupExec to optimize and simplify management, and in some cases even improve performance.

A Tape Library is a tape library, and is NOT an open storage device.  

There are only a few devices currently supported as an open storage device, Data Domain, ExaGrid, and Quantum DX series VTL/Dedupe appliances.  Thats it as far as I know.

John_Yassa
Level 4
so till now there is no way to use the deduplication backup to backup data on Tape library

teiva-boy
Level 6
To reiterate, there is NO dedupe to tape, only dedupe to an NTFS disk.  Please see my initial post as to why the reason for this.