Home » VMware » VCP550D » When performing a Storage vMotion migration, which setting should the vSphere administrator change in the virtual machine’s disk format to ensure it meets Fault Tolerance requirements?
A vSphere administrator needs to enable Fault Tolerance on a virtual machine.
When performing a Storage vMotion migration, which setting should the vSphere administrator change in the virtual machine’s disk format to ensure it meets Fault Tolerance requirements?
A. Thick Provision Eager Zeroed
B. Thick Provision Lazy Zeroed
C. Thin Provisioned
D. Thin Provision Eager Zeroed
Correct Answer: A
Explanation/Reference:
Explanation:
The only disk type that supports Fault Tolerance is Thick Provision Eager Zeroed.
Thick Provision Eager Zeroed:
A type of thick virtual disk that supports clustering features such as Fault Tolerance. Space required for the virtual disk is allocated at creation time. In contrast to the thick provision lazy zeroed format, the data remaining on the physical device is zeroed out when the virtual disk is created.
Incorrect Answers:
B: Thick Provision Lazy Zeroed creates a virtual disk in a default thick format. Space required for the virtual disk is allocated when the disk is created. Data remaining on the physical device is not erased during creation, but is zeroed out on demand at a later time on first write from the virtual machine. Thick Provision Lazy Zeroed disks do not support Fault Tolerance. Therefore, this answer is incorrect.
C: With Thin Provisioned disks, you provision as much datastore space as the disk would require based on the value that you enter for the virtual disk size. However, the thin disk starts small and at first, uses only as much datastore space as the disk needs for its initial operations. If the thin disk needs more space later, it can grow to its maximum capacity and occupy the entire datastore space provisioned to it. Thin Provisioned disks to not support Fault Tolerance. Therefore, this answer is incorrect.
D: Thin Provision Eager Zeroed is not a valid disk type. Eager Zeroed disks are always Thick Provisioned, not Thin Provisioned. Therefore, this answer is incorrect.
References:
https://pubs.vmware.com/vsphere-55/index.jsp#com.vmware.vsphere.storage.doc/GUID-4C0F4D73-82F2-4B81-8AA7-1DD752A8A5AC.html