How to Fix VMware error module disk power on failed error [Easy Guide]

What is ‘VMware error module disk power on failed’ error?

If you experiencing ‘VMware error module disk power on failed’ error while trying to start virtual machine in VMware hypervisor like VMWare ESXI/ESX, VMWare Work Station or VMWare Player, then you are in right place the solution. Here, you will be guided with easy steps/methods to resolve the issue. Let’s starts the discussion.

VMWare WorkStation: VMware is cloud computing and virtualization technology company offers VMware’s desktop software runs on Microsoft Windows, Linux and MacOS, while its enterprise software hypervisor for the servers. VMware ESXi – is a bare-metal hypervisor that runs directly on server hardware without requiring additional underlying operating system.

VMware software provides completely virtualized set of hardware to the guest operating system. This software virtualizes the hardware for video adapter, network adapter and hard disk adapters. The host provides pass-through drivers for guest USB, serial, and parallel devices. VMware WorkStation, Server and ESX take a more optimized path to run target operating system on the host then that of emulators (like Bochs) which simulate the function of each CPU instruction on targeted machine one-by-one.

However, several users reported that the faced ‘VMware error module disk power on failed’ error while they tried to boot up virtual machine using VMware software/VMware WorkStation software in their Windows 10 computer. This error usually reflects towards virtual machine not being powered OFF safely or properly which as result generate the said error message. Let’s take a look at error message.

“The process cannot access the file because another process has locked a portion of the file.

Cannot open the dis: disk directory.vmdk or one of the snapshots disks it depends on.

Module ‘Disk’ power on failed.

Failed to start the virtual machine.”

The possible reason behind this error can be another VMware files attempt to block VMware Software from running and blocking from starting virtual machine using this tool in your computer. This issue can also be occurred due to sudden power OFF of your computer or your virtual machine is not powered OFF. This error can also be occurred after your virtual machine crashes and you try to power it back ON.

Another possible reason behind this error can be issue with VMware Lock Files i.e., ‘.lck’ files are missing and can be caused due to various virtual machines reading and writing to the disk. So, the presence of VMware Lock Files basically amplifies the fact that said virtual machine is powered ON. Let’s take a look at VMware Lock Files.

VMware Lock Files (.lck files): VMware Lock files created when a virtual machine is powered ON. The purpose of Lock files is to prevent multiple VMware processes from accessing the same virtual machine at same time. The presence of a lock files indicates to VMware that the associated virtual machine is powered ON. If the lock files are present and attempt is made to power ON the virtual machine, VMware will prevent this and error message is displayed.

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How to Fix VMware error module disk power on failed error?

One possible way to fix this error is to delete VMware Lock files ‘.lck’ files. If VMware is not able to remove lock files as result, stable lock remains, you can remove lock files manually in order to resolve the issue. When you power ON your virtual machine that has stable lock, VMware tries to remove the file by checking two conditions whether check if the lock was created by same host of whether the process that created the lock is running or not. In both situation or either of these condition is not true and VMware is not able to delete lock files, then you can try deleting lock files manually.

Delete VMware lock files manually:

Step 1: Power OFF virtual machine if it is powered ON. If it is powered ON, right-click on Virtual machine and go to ‘Power > Power OFF’ to Power OFF the virtual machine

Step 2: Now, right-click on Virtual machine again and click on ‘Open VM Directory’ option

Step 3: Once you are in correct path, find and delete the folders that end with .lck Extension. You can also rename the folder to something else or more hem from that location to somewhere else.

Step 4: Once you have deleted the .lck files, open VMware again and try powering ON the virtual machine and check if you can use virtual machine without any issue.

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I am sure this post helped you on How to fix VMware error module disk power on failed error with several easy steps/methods. You can read & follow our instructions to do so. That’s all. For any suggestions or queries, please write on comment box below.

Samir Prakash Author