Interactive · disks → cluster

Cluster01 — how it fits together, and how it fell over

A live map of the two-node Hyper-V cluster: shared SAS storage at the bottom, up through MPIO, the Cluster Shared Volumes and disk witness, the two hosts and their VMs, and the cluster networks. Hover or tap any block for detail. Then flip to Incident and press ▶ Play to watch the 01 Jun failure cascade from one dark DAC cable all the way up — and recover.

0 / 10
Normal ops

Steady state

Dashed pulses show live SAS and cluster-heartbeat traffic. Everything is online except the iDRAC USB link, which is wrongly enrolled as a cluster network and always reports partitioned.

Tap any block for detail · drag to pan · pinch to zoom

Cluster control plane · Cluster01

Cluster01
Node Majority + Disk Witness · domain corp.local
Disk Witness
Quorum tie-breaker
on shared SAS — F-04
CSV Coordinator
CSV1 · CSV2
cluster-wide volumes
CNO + CAU
Cluster name object
CAU-Cluster

Hyper-V hosts & virtual machines

iD
H
★
VMHOST01WS2016 · owns CSV1
DC02 DC
local C:\VM
FP
on CSV1
RDS01
on CSV1
VM-LOCAL
non-clustered
MPIO
multipath
SAS HBA 12G
wide port 0single 4-lane DAC
HEARTBEAT
10 Gb
MGMT
iDRAC USB
✕ partition
iD
H
★
VMHOST02WS2016 · owns CSV2
DC01 DC
verify storage
WMS01
on CSV2
WMS02
on CSV2
SAS HBA 12G
wide port 0single 4-lane DAC
MPIO
multipath

Shared SAS storage · one enclosure, both hosts attached · every volume presented to BOTH nodes (CSV) — "owner" = coordinator only

Shared SAS enclosure
Quorum
witness disk
CSV1 Vol1
owner host01
CSV2 Vol2
owner host02