Does ESXi host survive persistent boot device loss?

Does ESXi host survive persistent boot device loss?

In this post I investigate what happens when a VMware vSphere ESXi host loses its boot device. This device is meant to be a persistent device. For non-persistent devices like USB- and SD-card, behavior is quite clear: whole ESXi OS runs in memory, no mass-write operations should be directed to the device. When it breaks, ESXi isn’t missing it and keeps running.

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3 reasons why direct SAN restore failover to NBD with Veeam VBR

3 reasons why direct SAN restore failover to NBD with Veeam VBR

Backups of VMware vSphere VMs can be done with one of three transport modes. Each of these modes also provide the possibility to restore data. This post is about 3 reasons why direct SAN restore failover to NBD with Veeam Backup&Replication (VBR).

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How to isolate NBD backup traffic in vSphere

How to isolate NBD backup traffic in vSphere

A new feature in vSphere 7 is the ability to configure a VMkernel port used for backups in NBD (Network Block Device) respectively Network mode. This can be used to isolate backup traffic from other traffic types. Up to this release, there was no direct option to select VMkernel port for backup. In this post I show how to isolate NBD backup traffic in vSphere. […]

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New in Veeam VBR v11: Combine vSphere Tags

New in Veeam VBR v11: Combine vSphere Tags

In Veeam Backup & Replication (VBR) there are a few ways to select VMs for backup. One of this is to use VMware vSphere tags. New in v11 is the possibility to combine vSphere tags for VM selection. I want to show how this works.

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News about scripting Veeam SureBackup with PowerShell

News about scripting Veeam SureBackup with PowerShell

This post is about new possibilities in Veeam Backup&Replication (VBR) for scripting SureBackup jobs with PowerShell. These new features are available since v10 and will get important enhancements in v11.

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How Advanced Cross vCenter vMotion works

How Advanced Cross vCenter vMotion works

This post is about a new feature in vSphere 7.0 U1c: Advanced Cross vCenter vMotion (XVM). It is similar to Cross vCenter vMotion with a main difference.

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PowerCLI Script to check if VMs get backed up by Veeam B&R

PowerCLI Script to check if VMs get backed up by Veeam B&R

In this post I share a small PowerShell/PowerCLI script to check if VMs get backed up by Veeam B&R. If you do not run VeeamONE, it can be challenging to check if every VM that should be backed up, is really backed up. For checking this, this script should be helpful.

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Poor SAN transport mode performance

Poor SAN transport mode performance

These days I had to troubleshoot poor VMware vSphere SAN transport mode performance during backup with Veeam. Before SAN mode, NDB transport mode was used. NBD outperformed SAN mode totally!

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Slow VM snapshot deletion on NFS volumes on ESXi hosts

Slow VM snapshot deletion on NFS volumes on ESXi hosts

These days I had to troubleshoot a problem with system time within a VMware vSphere VM. During backup VM freezes for more than 30 seconds. When this happens, system time in VM also stops and resets to current time after the freeze. And this behavior causes massive problems in the application-layer. During troubleshooting we found a very slow VM snapshot deletion on NFS volumes on […]

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ESXi storage connection problems after installing a new array

ESXi storage connection problems after installing a new array

I was troubleshooting storage related problems at a customer site for some time. We run into massive ESXi storage connection problems after installing a new array. Interestingly enough problems occurred on already existing storage a few hours after new array was installed. Because searching for root cause took some time, I thought it is worth to share.

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