Information Technology Reference
In-Depth Information
VMFS datastore; the two thick provisioning options are not available if you are provisioning to
an NFS datastore that does not have VAAIv2 support.
Figure 6.54
VMFS datastores
support all three
virtual disk types.
Is there a way to tell which type of virtual disk a VM is using? Certainly. In all three cases,
the free space indication within the guest OS is always going to indicate the maximum size of
the virtual disk, so you won't be able to use that. Fortunately, VMware provides several other
ways to determine the disk type:
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In the Datastore Storage Reports subsection, vSphere includes columns for virtual disk
space, uncommitted space, provisioned space, and space used. As you can see in
Figure 6.55, the columns break out these statistics on a per-VM basis. This allows you to
clearly see things like the maximum size of a thin-provisioned VM as well as the current
space usage. By right-clicking on the columns, you can select other columns that are not
shown in this screen shot, such as these:
Cluster
◆
Resource Pool
◆
◆
Multipathing Status
% Space Used
◆
% Snapshot Space
◆
% Virtual Disk Space
◆
◆
Swap Space
% Swap Space
◆
Other VM Space
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