6.0.1

4 On the Virtual Hardware tab, expand Hard disk to view the disk options.
5 To enable Flash Read Cache for the virtual machine, enter a value in the Virtual Flash Read Cache text
box.
6 Click Advanced to specify the following parameters.
Option Description
Reservation
Select a cache size reservation.
Block Size
Select a block size.
7 Click OK.
Converting Virtual Disks from Thin to Thick
You can determine whether a virtual disk is in the thin provision format and if required, convert it to the
thick provision format.
For more information on thin provisioning and available disk formats, see the vSphere Storage
documentation.
Determine the Disk Format of a Virtual Machine in the vSphere Web Client
You can determine whether your virtual disk is in thick or thin format.
If you have thin provisioned disks, you can change them to thick by selecting Flat pre-initialized disk
provisioning. You change thick provisioned disks to thin by selecting Allocate and commit space on
demand.
Procedure
1 Right-click a virtual machine in the inventory and select Edit Settings.
2 On the Virtual Hardware tab, expand Hard disk.
The disk type is displayed in the Disk Provisioning field.
3 Click OK.
What to do next
If your virtual disk is in the thin format, you can inflate it to its full size using the vSphere Web Client.
Convert a Virtual Disk from Thin to Thick in the vSphere Web Client
When the disk space is exhausted and a thin-provisioned disk cannot expand, the virtual machine cannot
boot. If you created a virtual disk in the thin provision format, you can convert it to the thick provision
format.
The thin provisioned disk starts small and at first, uses just as much storage space as it needs for its initial
operations. After you convert the disk, it grows to its full capacity and occupies the entire datastore space
provisioned to it during the disk’s creation.
Procedure
1 Locate the virtual machine.
a Select a datacenter, folder, cluster, resource pool, host, or vApp.
b Click the Related Objects tab and click Virtual Machines.
2 Double-click the virtual machine, click the Related Objects tab and click Datastores.
The datastore that stores the virtual machine files is listed.
vSphere Virtual Machine Administration
124 VMware, Inc.