Virtualization

A general system error occurred: esxi1: CHAP setting not compatible.

During datastore creation in vSphere using the Nimble vCenter plugin, I get the following error: A general system error occurred: esxi1: CHAP setting not compatible. hba=vmhba33 In vSphere Client I went to my ESXi host then Configuration, Storage Adapters, iSCSI Software Adapter.  Taking a look at vmhba33 Properties then CHAP… I see that there was…

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Intel Xeon E7540 replaced with X7560

Recently I’ve been dealing with CPU RDY of about 5% across two ESXi hosts. I’ve load balanced the best I could given necessary workloads and was able to get CPU RDY down to about 3-4% which still isn’t great. I made the decision to grab a few Intel Xeon X7560 processors to replace the existing…

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Performance tuning iSCSI Round Robin policies in ESXi for Nimble storage

Here’s an ESXi console script to loop through each Nimble eui.* adapter and set IOPS=0 and BYTES=0 (per Nimble recommendations). for x in `esxcli storage nmp device list | awk ‘/Nimble iSCSI Disk/{print $7}’ | sed -e ‘s/(//’ -e ‘s/)//’`; do echo $x esxcli storage nmp psp roundrobin deviceconfig set -d $x -t bytes -B…

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IBM System X3850 Disable Processor Power Management

In order to work around the issue processor power management has to be disabled in system UEFI and vSphere Client. To change power policies using server UEFI settings: Turn on the server. Note: If necessary, connect a keyboard, monitor, and mouse to the console breakout cable and connect the console breakout cable to the compute node.…

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My Notes and Benchmarks on VMware Flash Read Cache

I’ve spent some time exploring and studying the use and configuration of VMware Flash Read Cache (vFRC) and its benefits.  These are my notes. Useful Resources VMware Flash Read Cache 1.0 FAQ vSphere 5.5 Flash Read Cache Documentation On a guest virtual machine, vFRC is configured in Disk configuration area.  The virtual machine needs to…

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VMware vSphere 6.5 Test Drive

This will be an evolving post as I document/note the installation process and some configuration and testing. I’m installing VMware vSphere 6.5 under my current virtualization platform to give it a spin. I’m most curious about the web interface, now that it has moved exclusively in that direction. I *HOPE* it is much better than…

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Monitoring CPU Ready VMware Guest

CPU Ready value is cumulative between the number of vCPUs the VM is assigned. For example, a one vCPU VM has the measurement of 1000ms. For a VM with two vCPUs, the same performance drop would rise to 2000ms, or 1000ms per vCPU. For a VM with four vCPUs, it would be 4000ms. Realtime Monitoring…

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Sysprep Windows Server 2016 for Virtualization

Finally getting around to installing Windows Server 2016 (Standard, Desktop Experience) to use for application testing and upgrade plans this year.  I haven’t tested this release since Technical Preview 5 which had introduced the Nano edition. I plan to create a sysprep image of the virtual machine so I can quickly deploy the system in…

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List VMFS extents in ESXi

Run the esxcli storage vmfs extent list command to generate a list of extents for each volume and mapping from device name to UUID. You see output similar to: Volume Name VMFS UUID Extent Number Device Name Partition ———— ———————————– ————- ———————————— ——— esxi-local 4e0d86e1-0db6f826-6991-d8d3855ff8d6 0 mpx.vmhba2:C0:T0:L0 3 datastore1 4d4ac840-c1386fa0-9f6d-0050569300a7 0naa.6006016094602800364ce22e3825e011 1 vmfs5 4dad8f16-911648ca-d660-d8d38563e658 0naa.600601609460280052eb8621b73ae011 1

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This host has no isolation addresses defined as required by vSphere HA

Had some troubles with an ESXi 5.5 host the past week and rebuilt some of the networking which included removing a vmkernel and re-adding to a standard vSwitch and then setting up VMotion and Management tags on it. Came across the following error on my host in vSphere Client: To resolve this issue, I needed…

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