VMware

This is the procedure that has worked for me. There are various methods dating as far back as 2011 across the internet, but this step-by-step works in my environment for Windows and Linux virtual machines. Step 1 – Prepare the Guest Operating Systems Windows Linux Step 2 – Punch some Holes

Read More Reclaiming space from thin provisioned disks in VMware ESXi

Backup using vim-cmd To ensure that the configuration of the target ESXi host is synchronized with persistent storage, run the following command: vim-cmd hostsvc/firmware/sync_config To back up ESXi configuration, run this command: vim-cmd hostsvc/firmware/backup_config The command will produce a link for downloading the configBundle.tgz archive. Note that you have to replace the asterisk in the…

Read More Backup VMware ESXi Host

Upon migrating a VM from one ESXi host to another ESXi host, I received the following message. Configuration mismatch: The virtual machine cannot be restored because the snapshot was taken with VHV enabled. To restore, set vhv.enable to true Check and confirm on both hosts that /etc/vmware/config has vhv.enabled = “TRUE” in the configuration. This…

Read More Configuration mismatch: The virtual machine cannot be restored because the snapshot was taken with VHV enabled.

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…

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

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…

Read More Performance tuning iSCSI Round Robin policies in ESXi for Nimble storage

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…

Read More My Notes and Benchmarks on VMware Flash Read Cache