Virtualisation & Storage
Hyper-V host crashes and VM recovery, VMware ESXi PSOD and host disconnection, RAID array degradation, and storage subsystem performance collapse.
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Hyper-V host crashed — recovering virtual machinesHost has crashed, restarted unexpectedly, or VMs are stuck in saved/paused-critical state. Goal: stabilise the host first, then recover guests in the right order.
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VMware ESXi host disconnected or PSODESXi host has disconnected from vCenter, gone unresponsive, or hit a Purple Screen of Death. Restore management, then guests.
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RAID array degraded or failedOne or more disks have failed in a RAID set; array is degraded, rebuilding, or offline. Goal: avoid a second-disk failure during rebuild.
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Storage performance has collapsed (latency spike)Disk I/O latency has risen to the point that VMs, databases, or file services are unusable. Find the bottleneck before throwing hardware at it.
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VMware vSphere BRICKSTORM Malware — VCSA and ESXi Hypervisor Hardening and DefenseBRICKSTORM malware establishes persistence at the VMware vSphere virtualization layer (VCSA Photon Linux and ESXi hypervisors) beneath guest OS visibility, where traditional EDR agents cannot detect…
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Hyper-V Guest VMs Freezing or Restarting Unexpectedly — 2025 Emergency Update RequiredA defect in Hyper-V or its guest integration components causes Windows 10, Windows 11, and Windows Server guest VMs to freeze or restart without warning, with elevated impact in Azure confidential VM…
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Hyper-V Live Migration Fails at 80–90% Due to Kerberos Constrained Delegation Misconfiguration After Security HardeningLive Migration between Hyper-V cluster nodes fails consistently at 80–90% completion with security context negotiation or access denied errors. Recent security hardening updates enforce stricter Kerb…
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Hyper-V Live Migration Fails at 80–90% After Security Hardening — Kerberos Constrained Delegation MisconfigurationLive Migration of VMs between Hyper-V cluster nodes fails consistently at 80–90% completion with Event ID 21502 or 22038 indicating authentication negotiation failures. Recent platform security harde…