The current block size of a datastore in VMFS3 is 4MB. An administrator needs to upgrade the datastore to VMFS5 and wants to change it to 1MB block size.
Which action should the administrator take?
A. Upgrade the datastore to VMFS 5. Select the 1MB block size option during the upgrade.
B. Create a new VMFS5 datastore with a 1MB block size. Migrate all virtual machines from the existing datastore to the new datastore, then delete the VMFS3 datastore.
C. Upgrade the datastore to VMFS5. Use vmkfstools to change the block size on the upgraded datastore.
D. Create a new VMFS5 datastore with a 1MB block size. Migrate all virtual machines from the existing datastore to the new datastore. Upgrade the virtual machine hardware on the migrated VMs, then delete the VMFS3 datastore.
Correct Answer: B
Explanation/Reference:
Explanation:
In this question, we need to upgrade the VMFS3 datastore to VMFS5. This can normally be done in place without the need to power off or migrate the virtual machines. However, we also need to change the block size to 1MB. This cannot be done without deleting and recreating the datastore. Therefore, to do this without losing data, we will need to create a new VMFS5 datastore with the desired block size. Then we can migrate the virtual machines to the new datastore and then delete the old VMFS3 datastore.
Upgraded VMFS-5 partitions will retain the partition characteristics of the original VMFS-3 datastore, including file block-size, sub-block size of 64K, etc.
To take full advantage of all the benefits of VMFS-5, migrate the virtual machines to another datastore(s), delete the existing datastore, and re-create it using VMFS-5.
Incorrect Answers:
A: You cannot change the block size during a datastore upgrade. Therefore, this answer is incorrect.
C: You cannot change the block size of a datastore without recreating the datastore. Therefore, this answer is incorrect.
D: It is not necessary to upgrade the virtual machine hardware on the migrated VMs. This step is not required so this answer is incorrect.
References:
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2003813