Backup of Exchange Database with thousands of transaction logs runs slow when targeted to Deduplication Storage device.
The backup runs with the good throughput when backing up the database files and the throughput is seen to drop when backing up the transaction logs.
A hotfix is now available for this issue in the current version(s) of the product(s) mentioned in this article. Refer to the Hotfix link under Related Documents at the end of this article to obtain the hotfix needed to resolve the issue.
Backup Exec 2012 Rev 1798 Service Pack 2 (TECH203155)
Backup Exec 2012