Exam 5V0-21.19 topic 1 question 79 discussion

A is correct. If a disk experiences sustained high latencies or congestion, vSAN considers the device as a dying disk, and evacuates data from the disk. vSAN handles the dying disk by evacuating or rebuilding data. No user action is required, unless the cluster lacks resources or has inaccessible objects.

is A is Good

A is right. Dying Disk Handling monitors the performance of each storage device. If a device experiences sustained high latencies or congestion, vSAN first isolates the device and considers the device a dying disk and then evacuates data from the disk. Action taken by vSAN for the data on these disks or diskgroups depends on the configured policy and compliance state of objects that have their components on these disks or diskgroups: • If a component on the unhealthy disk or diskgroup belongs to an object that can tolerate the failure of this disk or diskgroup, then vSAN immediately marks that component as absent to avoid any impact on the performance of writes to that object. • If a component on the dying disk or diskgroup is required to maintain availability or quorum of a vSAN object, evacuation is triggered immediately. No user action is required unless the cluster lacks resources or has inaccessible objects. Taken from vSAN 6.7 Deploy and Manage Lecture Manual - About Dying Disk Handling section

A: Dying Disk Handling monitors the performance of each storage device. If a device experiences sustained high latencies or congestion, vSAN first isolates the device and considers the device a dying disk and then evacuates data from the disk. Action taken by vSAN for the data on these disks or diskgroups depends on the configured policy and compliance state of objects that have their components on these disks or diskgroups: • If a component on the unhealthy disk or diskgroup belongs to an object that can tolerate the failure of this disk or diskgroup, then vSAN immediately marks that component as absent to avoid any impact on the performance of writes to that object. • If a component on the dying disk or diskgroup is required to maintain availability or quorum of a vSAN object, evacuation is triggered immediately. No user action is required unless the cluster lacks resources or has inaccessible objects.

i think that A is correct also, health service has nothing to do with this

I think A is correct. Reason :vSAN applies a best effort procedure to evacuate all the “active” components from a “dying” disk but this process may fail if there are not enough resources in the cluster or if the components belong to inaccessible objects.

Answer A makes more sense