VSAN-Troubleshooting-Reference-Manual

Diagnostics and Troubleshooting Reference Manual – Virtual SAN
12. Troubleshooting Virtual SAN Upgrades
The complete Virtual SAN upgrade procedure is documented in the Virtual SAN 6.0
Administrators Guide. This section of the troubleshooting reference manual is
simply to demonstrate observations during a Virtual SAN On-Disk format upgrade,
and provide insight into when things may not proceed according to plan.
Virtual SAN upgrade - on-disk format v2
The upgrade process is 2-phase:
Software upgrade: Upgrade software from vSphere 5.5 to 6.0.
Format conversion: Reformat disk groups to on-disk format v2.
With the release of Virtual SAN 6.0, there now exists two different disk formats for
Virtual SAN. To check which version you are using, from the vSphere web client UI,
navigate to the Virtual SAN view, under disk group list and look for disk format
version column.
In this example, 3 out of 4 hosts are at v2. One is still at v1, and still needs to be
upgraded. Running Virtual SAN with different on-disk formats is not supported.
Before you start upgrading the on-disk format
Before doing an upgrade, ensure that there are no unhealthy disks in your Virtual
SAN Cluster. To view the disk status, run the RVC vsan.disks_stats command.
The command lists the names of all disks and hosts in the Virtual SAN. Use this
command to verify the current format and the health status of the disk. The status
appears as Unhealthy in the Virtual SAN Health Status column (in the Disk
Management page) for the hosts or disk groups with a failed disk.
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