VSAN-Troubleshooting-Reference-Manual

Diagnostics and Troubleshooting Reference Manual – Virtual SAN
Taking one last view from the vSphere client, this time of the physical disks, a Lost
Communication operation state against the disk in question is displayed.
It is also beneficial to use the CLI in these situations, as additional information can
be gleaned.
esxcli vsan storage list - unknown
This first ESXCLI command lists the storage on the host but the last entry in this
truncated list displays a lot of unknowns.
# esxcli vsan storage list
naa.600508b1001cadff5d80ba7665b8f09a
Device: naa.600508b1001cadff5d80ba7665b8f09a
Display Name: naa.600508b1001cadff5d80ba7665b8f09a
Is SSD: false
VSAN UUID: 5209c0c3-2143-7031-b404-060642590295
VSAN Disk Group UUID: 52e4dd37-f670-2125-2a4b-14eb7a0a6140
VSAN Disk Group Name: naa.600508b1001c40e393b73af79eacdcde
Used by this host: true
In CMMDS: true
Checksum: 108245589703025155
Checksum OK: true
Emulated DIX/DIF Enabled: false
Unknown
Device: Unknown
Display Name: Unknown
Is SSD: false
VSAN UUID: 5227c17e-ec64-de76-c10e-c272102beba7
VSAN Disk Group UUID:
VSAN Disk Group Name:
Used by this host: false
In CMMDS: false
Checksum:
Checksum OK: false
Emulated DIX/DIF Enabled: false
.
.
Also note that the disk is no longer claimed by Virtual SAN as the In CMMDS: false
indicates. This is the cluster monitoring and membership service, and Virtual SAN is
no longer claiming it.
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