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Barracuda MSP Partner Toolkit

How much temporary space do I need for a backup?

Backup Set Type

Temporary Space Recommendations

File and Folder

For each active worker process, half the size of the file it is working on, allowing for concurrent change block calculations being performed by each active worker. Remember that the largest source files in the backup set might be handled at the same time by those workers.

System State

>30 GB for temporary space

>30 GB for scratch drive

Microsoft SQL

At least the size of the largest database being backed up

Exchange Information Store

At least the size of the largest mailbox database being backed up

Exchange Mailbox Level

1 GB suggested

At least 300 MB required with default 3 worker setting; 100 MB minimum with 1 worker

VMware (Standard and Quickspin)

1 GB suggested

At least 96 MB required with default 3 worker setting; 32 MB minimum with 1 worker

Hyper-V (Standard and Rapid Recovery)

1 GB suggested

At least 100 MB required with default 1 worker setting;  100 MB minimum with 1 worker

Imaging

1 GB suggested

At least 100 MB per disk included in backup set required