User`s guide

Quest NetVault Backup Plug-in
for VMware User’s Guide
27
4.1.1.b Available Non-CBT Backup Types
The Plug-in for VMware always performs a Full Backup of the virtual disks for
virtual machines that do not support CBT.
Important: Regardless of the disk provisioning type, non-CBT backups always
back up the full disk size. Thus, backup of a 20GB thin-provisioned disk that only
uses 2GB results in a 20GB backup. When you restore a non-CBT backup, all
blocks are restored and allocated. After a disk is restored from a non-CBT backup,
subsequent CBT-enabled Full Backups back up the entire disk.
4.1.2 File-Level Backups
The Plug-in for VMware can also be used to back up individual files and folders for
Windows-based Guest OS. File-level backups enable granular restores of one or
more files, and can be used in the event of data loss due to user errors, data
corruption, or accidental deletion of files.
Zeroed Thick
(All space
allocated at
creation time,
unused part
zeroed out on
first write.)
Only used disk
sectors backed
up.
Only changed
disk sectors are
backed up.
Only used
sectors are
restored.
Only used disk
sectors are
restored. Each
sector is
restored only
once.
Eager Zeroed
Thick
(All space
allocated and
zeroed out at
creation time.)
All disk sectors
are backed up.
Only changed
disk sectors are
backed up.
The entire disk
is restored.
The entire disk
is restored.
Each sector is
restored only
once.
Virtual
Compatibility
RDM
All disk sectors
are backed up.
Only changed
disk sectors are
backed up.
The entire disk
is restored.
The entire disk
is restored.
Each sector is
restored only
once.
Network File
System (NFS)
All disk sectors
are backed up.
Only changed
disk sectors are
backed up.
The entire disk
is restored.
The entire disk
is restored.
Each sector is
restored only
once.
Disk Type
CBT-enabled
Full Image
Backups
Incremental/
Differential
Image Backups
Restore of
CBT-enabled
Full Image
Backups
Restore of
Incremental/
Differential
Image Backups