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Jonathan Neilly

Ramblings of a technonoob

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Jonathan Neilly

Category: ESXi

Working with ESXi Core Dumps

January 6, 2021 Jonny ESXCLI, ESXi, vCSA, VMware

Collecting core dumps gives VMware support (and massochists) something to evaluate in the event of an ESXi PSOD. Collecting and viewing ESXi core dumps involves serveral elements- ESXi configuration, collector configuration and a dump viewer.

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ISCSI, Delayed ACK and the Confused VMware Hypervisor

October 27, 2020 Jonny ESXi, iSCSI, VMware, vSphere

I’ve recently had the pleasure of taking over management of a customer’s DR environment. It’s in pretty good shape, mostly. Much more modern hardware than I often see, save for the iSCSI VM storage. iSCSI

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ESXi LUN Masking with ESXCLI

June 14, 2019 Jonny ESXCLI, ESXi, Storage, VMware, vSphere

Take a look at the following screenshot- How many disks are mapped or connected to this host? If I then showed you this screenshot, would it change your mind? LUN masking on ESXi goes against

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Reset Locked ESXi Root Account

April 2, 2019 Jonny ESXi, VMware, vSphere

By default, 10 failed logins to ESXi will lock the account. vCenter opens up a few options for changing a password (setting a new password with a host profile being the obvious one that springs

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Performing Scripted ESXi Installation

February 5, 2019 Jonny ESXi, VMware, vSphere

Interactive installations of ESXi are great in theory but what about when the datacenter scales in size? There are a few options when it comes to automating ESXi installation- one is the scripted installation. Scripted

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Add ESXi 6.5 Hosts to an Active Directory Domain

February 13, 2017 Jonny Active Directory, ESXi, VMware

You have everything hooked up to AD, right? There’s no better way to compromise your entire lab than having a SSO password for just about everything. I’m not (entirely) serious of course, but that’s a

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‘The host returns esxupdate error code:15.’ with VSAN and USB Boot Disks

September 13, 2016 Jonny ESXi, Update Manager, VSAN

I was recently having some difficulty with VMware Update Manager. Remediating each host in my lab failed with The host returns esxupdate error code:15. This was one of those very satisfying situations that I managed

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Installing VUM – Some Caveats

June 21, 2016 Jonny ESXi, Microsoft Windows Server 2012, Services, SQL Server, Update Manager, VMware, vSphere

I recently had the the great, great pleasure of discovering VMware Update Manager or VUM but as with most things in my environment, it wasn’t a straightforward install. VUM is only made for Windows but

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What are the odds of duplicate MAC addresses?

April 23, 2016 Jonny ESXi, VMware, vSphere

What are the odds that you buy two motherboards- from the same manufacturer but at different times, and end up with duplicate MAC addresses? I’m currently in the process of building a new homelab and,

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Change ESXi Host Static IP Address

August 22, 2015 Jonny ESXi, Networking, VMware, vSphere

I have been restructuring my homelab quite a bit- mainly segregating certain virtual machines onto their own VLANs- and decided to tidy up IP allocation on VLAN0. This is already a sensitive subject for me.

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VMware Certified Professional Data Center Virtualisation 2020

Recent Posts

  • Patching VMware vCSA 6.7 via Command Line
  • Working with ESXi Core Dumps
  • Perfmon: ‘Unable to Add These Counters’
  • Fully Disable IPv6 DHCP on Windows Server
  • ISCSI, Delayed ACK and the Confused VMware Hypervisor

Recent Comments

  • Gronker on Perfmon: ‘Unable to Add These Counters’
  • Jan Carsten on Fixing vCenter Error: “Another task is already in progress”
  • Jonny on Perfmon: ‘Unable to Add These Counters’
  • Juan Carbutt on Perfmon: ‘Unable to Add These Counters’
  • EReed on ‘Connection Control Operation Failed for Disk’ with Content Libraries

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