HP Data Protector A.06.11 Support for Vmware vstorage technical ...

DP snapshot1 and DP snapshot3 remain on the snapshot tree to track changes made since the last
full and the last backup respectively.
A subsequent differential backup progresses in the same way as an incremental session described
in Figure 10 Incremental backup (mixed mode) with the following exceptions:
DP snapshot2 is removed before DP snapshot3 is created.
Instead of changes made between DP snapshot2 and DP snapshot3, changes made between
DP snapshot1 and DP snapshot3 are backed up.
Considerations
Disk space: Virtual machine operations that are performed during backup require additional
disk space on the datastores.
You can specify the percentage of space on the datastores that must be free for a backup to be
performed, during backup specification creation.
Data Protector checks for each virtual machine or filesystem separately whether the required
disk space is available. If not, an error message is displayed for the backup of that particular
virtual machine or filesystem.
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