A customer has deployed a new vSAN Cluster with the following configuration:
6 x vSAN ReadyNodes
All Flash -
12 TB Raw Storage
vSAN 8 is deployed with ESA.
VMs are configured with a RAID-5 VM policy.
During failure testing, before the new platform is placed into production one of the ESXi hosts is made unavailable.
Which RAID-5 data placement schemes will vSAN use with this failure condition?
vSAN uses adaptive RAID-5 data placement which allows it to protect the platform even if an ESXi host becomes unavailable. Adaptive RAID-5 can function effectively with 3 to 5 hosts, so the cluster can still maintain data protection and integrity after losing a host. This ensures that data remains available and the platform remains protected.
A. vSAN can protect the platform using adaptive RAID 5 if the ESXi host fails to return
A is correct
Answer A is the right one. Adaptative RAID-5 will work with 3 to 5 hosts. So the 6th host can be definitely lost. B : vSphere HA does not manage the storage objects C : the VMs are protected (RAID-5=FTT 1), so their data is still available D : the degraded state is displayed only for a disk or controller permanent failure. Losing on e host will mark the component as absent.
https://core.vmware.com/blog/adaptive-raid-5-erasure-coding-express-storage-architecture-vsan-8
Answer A seems correct here - based on Adaptive RAID 5 data placement - https://core.vmware.com/blog/adaptive-raid-5-erasure-coding-express-storage-architecture-vsan-8