A 3-node All-Flash vSAN cluster has this configuration:
✑ One disk group per host
✑ All disk groups have identical make & model disks of an 800GB NVMe SSD cache and 2x 4TB SAS SSDs each
An administrator has been tasked with expanding storage capacity by adding one additional disk group with this configuration:
✑ 1.6TB SAS SSD cache and 1x 4TB SAS SSDs
Assuming all the disks are compliant with the vSAN HCL, which is true?
The additional disk group would make this cluster an unsupported configuration. In vSAN clusters, all disk groups within a host should ideally have a consistent configuration, including the type and size of cache and capacity drives. Mixing different types of SSDs (such as NVMe and SAS) and having different cache sizes among disk groups can create performance issues and inconsistencies. VMware best practices recommend homogeneity in disk group configurations to ensure optimal performance and supportability.
B it is supported but mostly not the best choice
You can't mix SSD and NVMe as there are vast performance differences. VMware does not support NVMe on Tri-Mode controllers: https://kb.vmware.com/s/article/88722 Answer is D.
B i would agree
I would pick B, it should work but definitely not best practise or recommended and i'm sure VMware Support would not support it either.
I think B