Virtualization / VMware

VMware

VMware resources for ESXi, vCenter, vSphere, VMDK, snapshots, datastores, shared storage, HA and vMotion.

ESXivCenterVMDKSnapshotDatastorevMotionPowerCLI

2BAOI modules

21selected resources

6definitions

Tools & diagnostics

Direct access to the most relevant BAOI modules for this technology.

Tool VMware Center / Virtualization

Open “VMware Center / Virtualization” and the related IT Toolbox features from this tool.

Open → Troubleshooting Storage / NAS / SAN Center

Guided diagnostics pour disques, RAID, SMART, NAS, SMB/NFS, iSCSI, MPIO, LUN, SAN, ZFS, LVM, snapshots et performances stockage.

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Dictionary

Essential concepts related to VMware.

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Dictionary Snapshot Memory VMware

A virtualization mechanism used to present or manage virtual-machine or cluster resources.

View → Dictionary Snapshot Chain VMware

A virtualization mechanism used to present or manage virtual-machine or cluster resources.

View → Dictionary VMware ESXi

A type 1 hypervisor used to run virtual machines on a physical server.

View → Dictionary CPU Co-Stop VMware

A VMware vSphere metric indicating time a multiprocessor VM waits for its vCPUs to be coordinated before execution.

View → Dictionary Snapshot Consolidation

A VMware operation that merges or cleans files from snapshot remaining.

View → Dictionary vCenter

VMware platform for the centralized management of several ESXi hosts.

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Practical guides

Step-by-step tutorials and procedures.

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Guide How to diagnose VMware Changed Block Tracking (CBT)

This BAOI guide provides a structured method for diagnosing vmware cbt without multiplying unnecessary changes.

View → Guide How to diagnose a vMotion failure

This BAOI guide provides a structured method for diagnosing vmotion failure without multiplying unnecessary changes.

View → Guide How to identify a VMware datastore that is filling

The growth of a data store must be attributed to VM,Producers, ISO or temporary files before cleaning.

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Troubleshooting

Related failures, errors and diagnostics.

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Troubleshooting ESXi Host Disconnected from vCenter

vCenter displays the host as Particulate or not.

View → Troubleshooting VMware CBT must be reset

The backup signals a problem with Changed Block Speed.

View → Troubleshooting VMware vMotion fails due to network

Hot migration cannot start or ends in error.

View → Troubleshooting VMware asks to consolidate the kennels

vCenter indicates that a consolidation of virtual machine discs is required after either,, or replication.

View → Error code Event ID 12289 — VSS snapshot error

VSS reported an error while creating or managing a snapshot.

View → Error code Snapshot chain invalid — Inconsistent snapshot chain

A virtual disk or backup depends on a missing or invalid parent in the snapshot chain.

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Field procedures

Reusable intervention methods.

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Procedure Handle a VMware VM with an inconsistent snapshot chain

Handle an inconsistent VMware snapshot chain without editing descriptors at random by freezing risky changes, inventorying VMDK files, checking vmkfstools…

View → Procedure Secure a nearly full VMware datastore

Stabilize a nearly full VMware datastore without deleting VM files at random by inventorying space usage, snapshots, ISO files and logs, creating safe head…

View → Procedure Create a dedicated vMotion network

Create a dedicated vMotion network on ESXi or vSphere with VMkernel interfaces, VLAN and MTU consistency, redundant uplinks, vmkping validation, and a pilo…

View → Procedure Resolve a VMDK "capacity was reduced" error

Diagnose a VMDK replication error reporting that capacity was reduced by comparing source and target geometry, snapshots, descriptors, and change history b…

View → Procedure Diagnose a VSS backup error

Diagnose a VSS backup failure without deleting snapshots at random by checking writers, providers, shadow storage, events, services, a controlled snapshot…

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Cheat sheets

Quick references for operations.

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Cheat sheet VMware — operating memo

VMware vSphere/ESXi operations reference for VMs, snapshots, datastores, networking, storage, services, logs and maintenance checks.

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Related technologies

Continue exploring with complementary topics.

Technology Backup & Disaster Recovery

Backup, restore and disaster recovery resources for Veeam, Acronis, VSS, RPO, RTO, immutability, replication and restore testing.

View → Technology Windows Server

Windows Server diagnostics and administration for services, RDP, storage, VSS, Event IDs, PowerShell, certificates and updates.

View → Technology IT Networking

Tools and methods for DNS, DHCP, VLANs, routing, Wi-Fi, switching, TCP/IP, latency, MTU and network diagnostics.

View → Technology Proxmox VE

Proxmox VE administration and troubleshooting for QEMU VMs, LXC containers, clusters, Ceph, storage, backups, migration and networking.

View → Technology Hyper-V

Hyper-V administration and troubleshooting for virtual machines, VHDX, checkpoints, vSwitch, Live Migration, replication, Failover Clustering and CSV storage.

View → Technology Storage / NAS / SAN

Enterprise storage resources for RAID, SMART, NAS, SMB/NFS, iSCSI, MPIO, LUNs, SAN, ZFS, LVM, snapshots, capacity and performance.

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