Category Archives: Virtualization

You will find below some basic and useful commands to operate a ESXi hypervisor from the command line. Put the host in maintenance mode (or leave maintenance mode) :

List all VMs registered on the host :

Verify the power state of a specific VM :

Power on a specific VM :… Read More »

Here is a list below of version and build number for VMware vCenter Server product. I have no credit over it, it has been taken from virten.net Web site. Name Version Release Build Installer Version vCenter Server 6.0.0 Update 2 6.0 U2 2016-03-15 3634793 3634788 VMware vCenter Server 6.0 Update 1b 6.0 U1b 2016-01-7 3339083 3343019… Read More »

VMware Converter can be awesome and a hassle at the same time. I have used it A LOT. I must say it is a great tool, but under some circumstances, even though you are converting a supported system which is the same as one you’ve done previously, it may fail (but the ones you did… Read More »

I have encountered the following issue lately trying to power on a virtual machine with a limited permission user using the vSphere Web Client : The “Power on virtual machine” operation failed for the entity with the following error message. Virtual machine cannot be found. This happened with a regular user with the appropriate role… Read More »

If you just have reconfigured your virtual machine hardware in vCenter and can see that the status is stuck at “In progress…” for a while (much longer than usual, even though waiting 30 minutes for something that should normally take 5 seconds), then you may be facing the bug I have seen in vCenter version… Read More »

Having the following error trying to apply IP restriction in the ESXi firewall using the vSphere client? Call “HostFirewallSystem.UpdateRuleset” for object “firewallSystem” on ESXi “0.0.0.0” failed. Operation failed, diagnostics report: Sysinfo error on operation returned status : Already exists. Please see the VMkernel log for detailed error information This behaviour can happen under the following… Read More »

The following error may occur if you have requested a VM to be deleted from disk : A general system error occured: Input/output error In my particular case, the VM was up to 12 Tb and after a little while the operation was running, the error message above showed up in vCenter. The virtual machine… Read More »

The following error is usually represented by a “pink screen of death” with the following output : PCPU 0 locked up. Failed to ack TLB invalidate. @BlueScreen: PCPU 0 locked up. Failed to ack TLB invalidate. NMI IPI received. Was eip(base):ebp:cs [0x76a42(0x41802f800000):0x412520x4010](Src 0x1, CPU2 The cause is that when interrupt occur, a context switch must… Read More »

I recently had the following issue in vCenter  : A non-existent network still associated with a virtual machine but marked as inactive. The VM has no longer any network interface mapped to that network but it still show in the network map and the VM overview. It turned out that a snapshot for this VM… Read More »