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Which two steps can an administrator take to upgrade an existing VMFS2 datastore to VMFS5? (Choose two.)
A. Attach the VMFS2 datastore to an ESX 3.x host and upgrade it to VMFS3
B. Attach the VMFS2 datastore to the vSphere 5 host and upgrade it to VMFS3
C. Upgrade the datastore from VMFS3 to VMFS5 on a vSphere 5 host
D. Upgrade the ESX host attached to the storage to vSphere 5
Correct Answer: AC
Explanation/Reference:
Explanation:
You cannot upgrade a VMFS2 datastore to VMFS5 directly because ESXi 5.x does not support VMFS2. However, you can upgrade a VMFS2 datastore to VMFS5 in two steps.
To upgrade a VMFS2 datastore, you use a two-step process that involves upgrading VMFS2 to VMFS3 first. Because ESXi 5.0 and later hosts cannot access VMFS2 datastores, use a legacy host, ESX/ESXi 4.x or earlier, to access the VMFS2 datastore and perform the VMFS2 to VMFS3 upgrade.
After you upgrade your VMFS2 datastore to VMFS3, the datastore becomes available on the ESXi 5.x host, where you complete the process of upgrading to VMFS5.
Incorrect Answers:
B: You cannot attach a VMFS2 datastore to a vSphere 5 host because vSphere 5 hosts do not support VMFS2. Therefore, this answer is incorrect.
D: Upgrading an ESX host does not automatically upgrade the datastore. Therefore, this answer is incorrect.
References:
https://pubs.vmware.com/vsphere-55/index.jsp#com.vmware.vsphere.hostclient.doc/GUID-7D88E01D-360F-4215-8D0B-F2B8424E5F42.html