Which steps should an administrator take to migrate existing ESXi 5.x virtual machines to a storage over-subscription model?
A. Right-click the .vmdk file, and click Deflate.
B. Right-click the .vmdk file, and click Compress.
C. Right-click the virtual machine, click Migrate, select the same datastore, and select Thin Provision.
D. Right-click the virtual machine, click Migrate, select a different datastore, and select Thin Provision.
Correct Answer: D
Explanation/Reference:
Explanation:
A storage over-subscription model means thin provisioned disks. Thin provisioning is a method that optimizes storage utilization by allocating storage space in a flexible on-demand manner.
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.
To convert a thick provisioned disk to a thin provisioned disk:
Right-click the virtual machine and select Migrate.
To locate a virtual machine, select a datacenter, folder, cluster, resource pool, host, or vApp.
Click the Related Objects tab and click Virtual Machines.
Select Change datastore and click Next.
Select "Thin Provision" for the virtual machine’s disks and click Next
Select a virtual machine storage policy from the VM Storage Policy drop-down menu, click Next
Select the datastore location where you want to store the virtual machine files and click Next.
Review the information on the Review Selections page and click Finish.
Incorrect Answers:
A: Deflate is not a valid option. You can ‘inflate’ a thin disk to a thick disk but you cannot ‘deflate’ a thick disk to a thin disk. Therefore, this answer is incorrect.
B: Compress is not a valid option. Therefore, this answer is incorrect.
C: You cannot migrate a virtual machine to the same datastore; you must select a different datastore. Therefore, this answer is incorrect.
References:
https://pubs.vmware.com/vsphere-55/index.jsp#com.vmware.vsphere.storage.doc/GUID-D18A4449-6C05-49C1-BE5D-3AAE29F0A681.html
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2014832
