Which is the block size on the VMFS6 datastore?
A.
All small and large file blocks are 8MB.
B.
All small and large file blocks are 1MB.
C.
Small file blocks are 512KB. large file blocks are 64MB.
D.
Small file blocks are 1MB, large file blocks are 512MB.
Explanation:
https://pubs.vmware.com/vsphere-65/index.jsp?topic=%2Fcom.vmware.vsphere.storage.doc%
2FGUID-98901BEE-8675-4D39-8AA2-E790EE341986.html
D
Correct: D
B is correct.
SFB and LFB are internal concepts for files only.
VMFS block size is still and always 1 MB
Correct, B is the answer
Why do you supposed the “B” answer has the “file block” language in it? Wouldn’t it just say “the block size is 1 MB”?
How would the question be worded differently for the correct answer to be D?
You’re right, I also asked a friends of mine and he confirmed checking the official source: “VMFS6: Uses 1 MB and 512 MB block sizes that are good for storing large virtual disk files.”
*D*
However, its a very tricky question… the answer is in small file blocks vs. large file blocks vs block size. From Cormac (Director and Chief Technologist in the Office of the CTO in the Storage and Availability Business Unit (SABU) at VMware):
VMFS-6 introduces two new internal block sizes concept for file creation. These are referred to as LFB (Large File Blocks) and SFB (Small File Blocks) and are used to back files on the VMFS-6 volume. This is not to be confused with the VMFS Block Size, which continues to be set to 1MB.
The SFB size is set to 1MB; the LFB size is set to 512MB.
https://cormachogan.com/2017/08/16/vmfs-6-large-small-file-blocks/