VSAN-Troubleshooting-Reference-Manual

Diagnostics and Troubleshooting Reference Manual – Virtual SAN
5. ESXi version check, all hosts should be above 6.0; the administrator should
ensure that all hosts are upgraded to version 6.0.
6. Disk auto-claim should be disabled prior to upgrading because with autoclaim
enabled, we cannot remove disk groups to evacuate data; the
administrator may disable this configuration through vSphere web client UI,
or via the RVC command:
vsan.cluster_change_autoclaim -d
7. Detect if inaccessible objects exist in the VSAN cluster; if inaccessible swap
object exists, the administrator may use the following RVC command to
cleanup:
vsan.purge_inaccessible_vswp_objects
8. Detect unhealthy disks used by VSAN; the administrator may use the RVC
command "vsan.disks_stats" to check all in-use disks, and manually fix
the issue, such as replacing broken disk with a new one;
9. Detect if there are v2 object in given VSAN cluster if the administrator
specifies "downgrade" mode; v2 objects should be removed if customer
really needs a v1 VSAN cluster. Downgrade is for rollback, if a user
encounters an issue and needs to go back to v1 on disk format.
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