🔹 iDRAC Restart
Q: What happens if you restart iDRAC on a Dell server running ESXi?
A: Restarting iDRAC only resets the management controller. ESXi and VMs continue running normally; only remote management access is temporarily interrupted.
🔹 NFS vs VMFS
Q: What’s the difference between NFS and VMFS in VMware?
A:
- VMFS: VMware’s clustered file system on block storage (SAN). High performance, tightly integrated.
- NFS: File-level NAS protocol. Easier setup, scalable, but performance depends on network.
🔹 Content Libraries
Q: What are Content Libraries in vSphere?
A: Central repositories for VM templates, ISOs, and scripts. Types: Local, Published, Subscribed. They ensure consistency, automation, and scalability across vCenters.
🔹 Affinity Rules
Q: What are Affinity Rules in VMware?
A: Policies to control VM placement:
- VM-VM Affinity → keep VMs together.
- VM-VM Anti-Affinity → keep VMs apart.
- VM-Host Affinity → bind VM to host.
- VM-Host Anti-Affinity → prevent VM on host.
🔹 VMware Tools
Q: Why is VMware Tools important?
A: It’s a guest agent that improves performance, integration, and manageability. Provides optimized drivers, time sync, clean shutdowns, and snapshot quiescing.
🔹 PSOD
Q: What causes a Purple Screen of Death (PSOD) in ESXi?
A: Hardware faults (RAM, CPU), driver/firmware issues, storage/network errors, or kernel bugs. ESXi halts to prevent corruption and displays diagnostic info.
🔹 Secure Boot
Q: What is Secure Boot in VMware?
A: A UEFI feature ensuring only signed, trusted code runs at startup.
- ESXi Secure Boot: Protects hypervisor integrity.
- VM Secure Boot: Protects guest OS boot process.
🔹 VM Stuck at 80% Boot
Q: Why does a VM get stuck at 80% during boot?
A: Usually due to storage latency, snapshot issues, vMotion/HA recovery delays, or resource contention. Logs and datastore health should be checked.
🔹 vSphere Standard vs Enterprise Plus
Q: What’s the difference between vSphere Standard and Enterprise Plus licenses?
A:
- Standard: Core virtualization, HA, vMotion.
- Enterprise Plus: Adds DRS, Storage DRS, Distributed Switch, advanced security, scalability.
🔹 Tagging
Q: What is tagging in vSphere?
A: Metadata labels applied to objects (VMs, datastores, networks) for organization, automation, and policy enforcement. Example: “Prod”, “Test”, “Finance”.
🔹 DRS Score
Q: What is a DRS Score in VMware?
A: A percentage showing how balanced resources are across a cluster. High score = well-balanced; low score = imbalance, prompting vMotion recommendations.
🔹 vSphere Replication
Q: What is vSphere Replication?
A: Hypervisor-level VM replication. Storage-independent, per-VM, asynchronous with RPOs from 5 minutes to 24 hours. Often paired with SRM for DR orchestration.
🔹 VM to Template Conversion
Q: What happens when you convert a VM into a template?
A: The VM is powered off and becomes a read-only golden image. It cannot be powered on until converted back, but can be cloned to deploy new VMs consistently.
🔹 Cross vCenter Requirements
Q: What are the requirements for Cross vCenter vMotion?
A:
- vCenter 6.0+ (same or compatible versions).
- Proper licensing (Enterprise Plus for full features).
- Layer 2 network connectivity.
- Storage accessible (shared or shared-nothing).
- Host CPU compatibility (EVC if needed).
- vCenter trust/communication setup.
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