vSphere Upgrade Options
Posted by Mike Preston on October 26, 2017

When it comes time for your vSphere upgrade there are many different approaches to how you perform the upgrades on your ESXi hosts.   An administrator who looks after a small cluster may update one way, whereas an administrator who looks after an enterprise with 1000s of hosts may opt to go another.  Also, depending on how your environment is deployed you might want to choose one method over another.  Factors such as a whether or not your hosts are managed by a vCenter server, whether or not they are members of a cluster – these things all impact the methods in which you chose to update to the latest version of ESXi.  Certainly, some methods are much more simplistic than others to perform, some offer more advantages when upgrading at scale, and some are more prone to user error – let’s take a look at each method of upgrading our hosts below and discuss the benefits and drawbacks of each…

VMware vSphere logo


Accessing esxcli through PowerCLI
Posted by Mike Preston on October 4, 2017

Picture this – you are working away developing a PowerCLI script that is performing multiple actions – you have it just about complete when you come to a roadblock.  After frantically googling around you find out that this one task you are trying to perform simply cannot be done through PowerShell, yet you know it exists within the local ESXi esxcli command namespace!  This has happened multiple times to me and thankfully, there is a way to access ESXi’s esxcli command namespace without having to leave the comforts of the PowerShell Console.

Chances are that if you have been working at all with ESXi you are familiar with the esxcli command – but for those that aren’t let’s take a quick look at what exactly it does.

esxcli namespaces


TBW from SSDs with S.M.A.R.T Values in ESXi
Posted by Oksana Zybinskaya on May 23, 2016

Solid-State-Drives are becoming widely implemented in ESXi hosts for caching (vFlash Read Cache, PernixData FVP), Virtual SAN or plain Datastores. Unfortunately, SSDs have  limited lifetime per cell. Its value may range from 1.000 times in consumer TLC SSDs up to 100.000 times in enterprise SLC based SSDs. Lifetime can be estimated by device TBW parameters provided by vendor in its specification, It describes how many Terabytes can be written to the entire device, until the warranty expires.smartctl_in_esxi