Storage Spaces Direct health indicators
Overview
S2D pools disks across nodes; health is cluster-wide. Ignored minor faults cascade to pool offline.
Watch items
- PhysicalDisk OperationalStatus: predictive failure SMART bits.
- Storage Jobs stuck in repair—investigate disk or network fabric.
- Pool capacity % free: Microsoft recommends planning before 80% sustained; journaling stress climbs near full.
Network
RDMA-capable switches with correct QoS; subnet/VLAN mistakes mimic “slow disk” pain.
Verification
Monthly Test-Cluster health report; Get-PhysicalDisk | ? HealthStatus -ne Healthy in automation ticket.
Escalation
Multiples drives yellow in same chassis—backplane/SAS expander suspicion; involve hardware vendor before replacing everything randomly.
Docs
Export cluster inventory after node swaps; serial-to-slot map saves night-shift guesswork.
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