VSAN-Troubleshooting-Reference-Manual

Diagnostics and Troubleshooting Reference Manual – Virtual SAN
Using RVC to display adapter information
In an earlier chapter, ESXi commands that were used to gather adapter information
were examined. This was done with a view to using this information to check the
VMware Compatibility Guide (VCG) and ensuring that the Virtual SAN components
are supported. There is also a way to display useful information about adapters
using RVC by using the following command.
vsan.disks_info –show-adapters
The RVC command, vsan.disks_info --show-adapters, is useful for
displaying information about your disks and flash devices. It also displays
information about the adapter and drivers used by the ESXi hosts. Here is an output
taken from a host with a PCI-E FusionIO adapter. The device shows up as an SSD in
the output (this is from the 5.5 version of the command):
+-------------------------------------------------------------+-----+--------+-----------------------+
| Local FUSIONIO Disk (eui.48f8681115d6416c00247172ce4df168) | SSD | 1122GB | inUse |
| FUSIONIO IODRIVE | | | |
| | | | Adapters: |
| | | | fioiom0 (iomemory-vsl )|
| | | | Fusion-io ioDrive2 |
+------------------------------------------------------------+-----+--------+------------------------+
Here is a sample output form a host with uses HP’s P410i controller. The driver is
“hpsa” and the disk device size (MD is short for magnetic disk) is 136GB that is
actually a relatively small disk drive; this is from the 6.0 version of the command.
+-----------------------------------------+-------+---------+----------------------------------------+
| HP Serial Attached SCSI Disk | MD | 136 GB | inUse (The disk resides on a |
| (naa.600508b1001c64816271482a56a48c3c) | | | non-local storage transport: |
| HP LOGICAL VOLUME | | |'naa.600508b1001c0cc0ba2a3866cf8e28be'.)|
| | | | |
| | | | Adapters |
| | | | vmhba1 (hpsa) |
| | | | |
| | | | Hewlett-Packard Company |
| | | | Smart Array P410i |
| | | | |
| | | | Checksum Enabled: false |
+-----------------------------------------+-------+---------+----------------------------------------+
Using RVC to verify Virtual SAN functionality
At this point, the most common RVC commands will be run to check Virtual SAN
state and verify functionality. Other commands will be looked at in the later sections
of this troubleshooting reference manual.
On a Virtual SAN cluster that has just been deployed, the vSphere web client may
report everything functioning normally, but it is low on detail. This next set of
commands will display detailed information about the state of the Virtual SAN
cluster, and confirm that the cluster is fully operational.
This first command is very useful for getting an overview of the cluster state.
V M W A R E S T O R A G E B U D O C U M E N T A T I O N / 81