An administrator has been tasked with upgrading existing vSAN OSA cluster hosts with a SSD cache device per host to a NVMe device (hot plug).
Which fact should guide the administrator's action?
An administrator has been tasked with upgrading existing vSAN OSA cluster hosts with a SSD cache device per host to a NVMe device (hot plug).
Which fact should guide the administrator's action?
In a vSAN OSA cluster, when replacing a cache device, it is necessary to delete the existing disk group on each physical host. This is because the vSAN OSA architecture relies on disk groups that consist of a single cache device and one or more capacity devices. Replacing the cache device requires removing the entire disk group, as the cache and capacity layers cannot be modified independently within a disk group. Therefore, the correct approach is to delete the current disk group, replace the cache device, and then recreate the disk group.
When using the vSAN OSA, replacing a Cache Device will always cause the disk group to be removed form the host with the data unrecoverable. A process to orderly perform this is as follows. 1. Click the Configure tab. 2. Under vSAN, click Disk Management 3. Under Disk Groups, select the disk group to remove, click …, and then click Remove. 4. Select Full data migration as a migration mode and click Yes. 5. Remove the physical Cache disks from the host. 6. Add the flash devices to the host. 7. Verify that no partitions exist on the flash devices. 8. Create the all-flash disk groups on that host. 9. Repeat the process one host at a time. The vSAN Express Storage Architecture in vSAN 8 does not use the construct of a disk group, or a dedicated caching tier. https://core.vmware.com/resource/vsan-frequently-asked-questions-faq#section12
Ans A is correct Replacing a Cache Disk A cache disk replacement requires the recreation of the entire disk group. To replace a cache disk in the vSAN environment: • Ensure there is adequate space to remove the disk group • If the cache disk is healthy, evacuate the data • If the cache disk isn't healthy, use no data migration • Replace the cache disk • Recreate the disk group