An administrator has created a Virtual Flash Read Cache and needs to add a total 2TB of capacity to
the cache. The administrator has a total of six SSD disks to add, but is unable to add one of the disks.
What is a likely cause of the problem?
A.
The SSD device size is less than 256GB.
B.
The SSD device size is greater than 4TB.
C.
The SSD device is a local disk.
D.
The SSD device contains existing data.
Virtual Flash volume limits
The Virtual Flash volume limits are:
•Virtual Flash volumes per host – 1 (local only)
•SSDs per Virtual Flash volume – 8 or fewer
•SSD size – 4 TB or less
•Virtual Flash size – 32 TB or less
•vSphere Flash Read Cache reservation size – minimum: 4 MB, maximum: 400 GB
•vSphere Flash Read Cache block size – minimum: 4 KB, maximum: 1 MB
from http://kb.vmware.com/selfservice/search.do?cmd=displayKC&docType=kc&docTypeID=DT_KB_1_1&externalId=2057206
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First off, this is what we will need to setup Virtual Flash:
vSphere 5.5 or later
ESXi hosts 5.5 or later with:
SSD storage
With 8 or less SSD drives for Virtual Flash Volume (VFV)
Each drive 4TB or less
Maxing out at a combined 32TB or less (8 drives X 4TB = 32TB)
Once we have these in place lets configure some Virtual Flash.
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