Netbackup Flashbackup or Agent based backups

You can try flashbackup for windows. It will back up the underlying FS blocks. If your disk has a relatively good performance then it will be fairly quick.

Have you tried using accelerator with out change journal. I've seen it go faster when its disabled in some instances.

Also, you can run collections on EV volumes so that the small files are collected and placed into CAB files (zipped up so to speak).

Ran a couple of test with Flash backup on a 1TB data filled volume and not too sure I understand the logs 

I ran two full backup with Media -side dedupe enabled and got the following for both Flashbackn and Agent bakcups 

FlashBackup

If so I‘m confused why on a full backup it says:

scanned:               2150144522 KB = 2TB

sent:                       19967712 KB = 19GB = approx. 0.009%

to me this implies that the de-duplication was done on the client side ??? 

Agentbased Backup 

Any thoughts or explanation on theses stats 

It backed up 2TB because your volume is 2TB (50% used). Remember I said it backs up the file system blocks, not the files that reside on the file system.

CR sent meant that only that amount was transferred between the deduplication engine and the content router (CR).

Flashbackup is better suited for 'nearly full' volumes.

The block-level backup is described in the Snapshot Client manual.

The main issue is we were wondering whats the best way to backup the following data in the senario below 

• 2 x Windows Storage Server 2012 R2 in Microsoft Failover Cluster (COL1FILE01 and (COL2FILE01)
• Running clustered file server role (File Server for General Use) in Active/Active configuration (one file server role on each node)
• Shared volumes on HP Lefthand P4530 storage assigned as follows:
  • 1 x 1GB Quorum disk assigned to core cluster resource
  • FILE01 (virtual hostname)
    • 1 x 4TB volume
    • 1 x 5TB volume
    • 1 x 3TB volume
    • 1 x 1.5TB volume
    • 1 x 1TB volume
    • 1 x 100 GB volume
  • FILE02 (virtual hostname)
    • 1 x 20TB volume
• Enterprise vault FSA agent installed as a cluster resource on each file server role

What the the main Pros and Cons with Flashbackups and Traditional Accelerator MSDP backups

1. Flashbackup is good, but bear in mind that entire volume needs to be backed up at block-level (even unused blocks) with the size of the new file volume I don’t think we have the space
2. We can run Multiple stream using Agent backup and cannt do that on flashbackup
3. The Agent backup first full backup may take a while to build the track oogs depending on changes , accelerator  in this can be reduced
4. Restores times are far better with Agent backus than flash backups

Are all the above correct ? i really need to compile a list for my manager so we can decided whch way to proceed

4. You should get better performance when restoring with FlashBackup (if restoring everything). Otherwise it would be pretty much the same.