Dears,
I've following setup: vcenter/ESXi 6.5 & vSAN 6.6.1. ESXi hypervisors are guesting two disk groups each, all SSD. Last time I've done some scaling by adding capacity disks. Now I found very disturbing information related to vSAN 6.6.2:
vSAN: Adding and Removing Drives with Deduplication and Compression
"Note that when a drive is added to a disk group with deduplication and compression enabled, the newly added drive does not automatically participate in the deduplication and compression process. The new drive is used to store data, but that data is not deduplicated and compressed. The disk group must be deleted and recreated so that all of the capacity drives in the disk group (including the new drive) store deduplicated and compressed data."
Is that true for vSAN 6.6.1 and later? If yes, should I need to take the following steps?
- place the host in maintenance mode with 'evacuate all data to the other hosts' (long process...),
- delete and recreate disk groups one by one,
- exit maintenance mode & proactive re-balance it.
Thank you,
Dominik