Exam 5V0-21.20 topic 1 question 38 discussion

is correct, you will be prompted to chose another options such as data accessible and no data migration Mirror FT=1 MUST HAVE 3 hosts and if u do full data migration it implies to vsan that the host will NOT be coming back and hence will prevent host going into maintenance mode

B is correct. A is not possible with only three hosts. In a two hosts cluster (2 hosts + 1 witness) and three-host clusters, only FTT supported is 1. vSAN saves each of the two required replicas of vm data on separate hosts with witness object on a third host. Because of the few hosts in the cluster, the following limitations exist: When a host fails, vSAN cannot rebuild data on another host to protect against another failure and due to this data becomes non-compliant till the host is back. If a host must enter maintenance mode, vSAN cannot evacuate data from the host to maintain policy compliance. While the host is in maintenance mode, data is exposed to a potential failure or inaccessibility if an additional failure occurs. So, full data migration is not supported in this 2 or 3 node clusters. In any situation where two-host or three-host cluster has an inaccessible host or disk group, vSAN objects are at risk of becoming inaccessible should another failure occur.

B is correct in a 3 hosts vsan cluster it is possible to put a node in maintenance but not this way.

Rather C, General VSAN error

I Think B is correct. 3 hosts are the min requirement for FTT=1 Raid 1. When 1 hosts is in MM there is nowhere to migrate the data too to maintain the policy.