Hi,

I’ve seen similar problems.

First LTO4 vs. LTO3 will require some tuning, I’m thinking of data buffer and network buffer size, referring to  NBU tuning guide. You should have a look at adding those entries  to you environment.

Allowing the NBU software to use more internal resources in media server to stream data.

Second, I’ve seen a lot better performance as well not using multiple stream on exchange backups. Reason for this is NTFS volume and performance problems reading the volumes.

Of course this depends on how you have configured you information store disk’s, my case all DB’s where on the same volume 3 times 300 plus GB, backing up about  1TB Data.

Regards

Kenneth

Hi
Environment:
NBU 5.1 MP5 Master Plus many SAN SSO Media Servers Win2k3 SP2
Problem: Mail Backups of Information Store using LTO4 SL500 are taking 4 1/2 hours extra to backup compared to LTO3.

Has anyone got any exposure to Ex2k3 / LTO4 / NBU5.1 Online Exchange Backups? Checking the Exadmin Guide showed little to no help, and we are backing up approx 1TB of Exchange Data.

Job would start at 6:30 and normally finish at 10:30. Now, its finishing at 3:00am.
Same configuration is in place (ie: 3 streams to 3 different drives) and all part of the same fabric, apart from being in a different building.

Any advice appreciated.

Regards

Simon

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