1V0-621 · Question #201
Which storage format can be used to deploy data stores on block storage devices?
The correct answer is C. VMFS. See the full explanation below for the reasoning.
Question
Which storage format can be used to deploy data stores on block storage devices?
Options
- AVirtual Volumes
- BNFS
- CVMFS
- DjSCSI
How the community answered
(45 responses)- A7% (3)
- B4% (2)
- C71% (32)
- D18% (8)
Community Discussion
5
Yelena W.Jan 30, 2026VMFS is the correct answer. It is VMware's proprietary clustered file system designed specifically to be deployed on raw block storage devices such as iSCSI LUNs, Fibre Channel, and local SCSI disks, and it is the only format in that list that operates natively on block storage rather than a file-level or object-level protocol.
Mei-Ling H.Jan 31, 2026Good point, and for the exam I would also highlight that the word "clustered" in VMFS is the trap-word answer that rules out NFS, because NFS also works with VMware block-level datastores in some setups but operates at the file protocol layer, so if the question says "raw block storage" or "simultaneous multi-host access at the block level," VMFS is the only pick that fits both conditions at once.
Mei-Ling H.Feb 15, 2026VMFS is right. It is VMware's clustered file system designed specifically to run on block storage like Fibre Channel and iSCSI LUNs, which is exactly what the question is testing with that word "block storage devices."
Brenda K.Feb 17, 2026Correct on the block storage point, and worth noting for exam purposes that VMFS also supports local SCSI disks, so the distinguishing factor the question is really testing is shared concurrent access across multiple ESXi hosts, not block storage alone.
Brenda K.Feb 18, 2026VMFS is the one built specifically for block storage, which is exactly why you see it paired with iSCSI or Fibre Channel rather than a network file protocol. Quick one though, do you know offhand why NFS gets ruled out here even though it is also a way to present datastores to an ESXi host?