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Last updated: Apr 30, 2024

How to increase the size of a VMware disk and Expand Partition?

When working with virtual environments, flexibility and scalability are key. VMware, a global leader in cloud infrastructure and digital workspace technology, offers robust solutions for running multiple operating systems on a single physical machine. These virtual machines (VMs) rely on virtual disks to store operating system, application files, and other data. As your needs grow, you may find yourself needing more storage space than you initially allocated. Increasing the size of a VMware virtual disk and expanding the partition to utilize this new space can be a straightforward process, but it requires careful steps to ensure data integrity and system stability.

In this article, we will guide you through the detailed process of increasing the size of your VMware virtual disk and expanding the partition to make use of the additional space. Whether you are a system administrator managing a corporate data center or a developer working on a personal project, these steps will help you scale your virtual machines efficiently. From using VMware's native tools to adjusting partition sizes within the operating system, we'll cover everything you need to know to perform this task seamlessly. Let's dive in and ensure your virtual machines have all the room they need to grow.

An overview of VMware virtual machines

VMware virtual machines (VMs) are a cornerstone of modern IT infrastructure, enabling users to run multiple instances of operating systems simultaneously on a single physical server. These virtualized environments are created and managed by VMware's suite of virtualization products, such as VMware vSphere, VMware Workstation, and VMware Fusion. The ability to create and manage these VMs has revolutionized IT operations, offering unparalleled flexibility, scalability, and efficiency. Here's an overview of what VMware virtual machines are and why they're so pivotal:

What are VMware Virtual Machines?

A VMware virtual machine is a software-based emulation of a computer system. It runs an operating system and applications just like a physical computer, but it's encapsulated within a set of files on a host machine. Each VM has its own set of virtual hardware resources, including CPU, memory, disks, and network interfaces, which are allocated from the physical resources of the host system.

Core Components

  • Virtual Disk: A VM stores its data on one or more virtual disks, which are files on the host file system. These disks can be expanded and resized as needed.
  • Virtual Hardware: Virtual CPUs, RAM, network adapters, and other devices are allocated to each VM, mimicking the components of a physical computer.
  • Hypervisor: The VMware ESXi hypervisor, or a similar component in other VMware products, creates and runs VMs. It allocates physical resources from the host to the VMs.

Key Benefits

  • Isolation: Each VM is isolated from others, ensuring that processes running on one VM do not interfere with those on another.
  • Consolidation: Multiple VMs can run on a single physical server, optimizing resource utilization and reducing hardware costs.
  • Flexibility and Scalability: VMs can be easily created, duplicated, moved, and resized to meet changing demands.
  • Snapshot and Cloning: VMs can be snapshot for point-in-time recovery and cloned for testing or deployment purposes.

Use Cases

  • Development and Testing: Developers can use VMs to create and test applications in different environments without needing multiple physical machines.
  • Server Consolidation: Businesses can consolidate their physical servers into fewer machines to save on hardware and energy costs.
  • Disaster Recovery: VMs can be quickly migrated to another host in the event of hardware failure, minimizing downtime.
  • Cloud Computing: VMware's technology is foundational to many cloud computing services, offering scalability and efficiency in deploying virtual resources.

Management Tools

VMware provides a range of tools for managing VMs, including:

  • vSphere: For managing VMs in a server environment.
  • Workstation: For running VMs on a workstation or personal computer.
  • Fusion: For running VMs on a Mac.
  • vCenter Server: For centralized management of VMs across a large enterprise.

In conclusion, VMware virtual machines offer a dynamic and efficient way to utilize computing resources, enabling organizations and individuals to adapt quickly to new challenges and opportunities. The technology continues to evolve, offering ever more sophisticated ways to manage and deploy virtual environments.

Tip: VMware increase D size solution!

The significance of expanding virtual machine disk sizes

Expanding the disk sizes of virtual machines (VMs) is a critical task in managing a virtualized environment. This process not only ensures that your VMs can accommodate growing data needs but also brings several significant advantages that can enhance the overall performance and reliability of your IT infrastructure. Here's a closer look at the significance of expanding VM disk sizes across various dimensions:

Heightened Performance

Increasing the disk size of a VM can lead to improved performance. With more disk space, you reduce the risk of running out of space, which can cause significant slowdowns and adversely affect the performance of applications running on the VM. Additionally, having the ability to expand storage on-demand means that performance can be optimized based on current needs, ensuring that VMs always operate efficiently.

Enhanced Scalability

Scalability is a key benefit of virtualization, and the ability to expand VM disk sizes is a critical aspect of this. As workloads grow, being able to scale up resources, including disk space, ensures that your infrastructure can grow with your needs without requiring a complete overhaul or migration to larger servers. This scalability supports business growth and adaptation without the limitations of physical hardware constraints.


Expanding VM disk sizes is a cost-effective strategy for managing IT resources. Instead of investing in new physical hardware every time you need more storage, you can simply allocate more disk space to your VMs. This approach maximizes the utilization of existing resources and delays or eliminates the need for additional physical servers, thereby saving money on hardware costs, maintenance, and even energy consumption.

Minimized Downtime and Financial Setbacks

Running out of disk space can lead to critical system failures and downtime, which in turn can cause significant financial losses, especially for businesses relying on continuous online presence and service availability. By proactively expanding VM disk sizes, you can minimize the risk of downtime and the associated financial setbacks, ensuring business continuity and reliability.

Capability for Experimentation

With ample disk space, developers and IT professionals have the freedom to experiment with new applications, updates, and configurations without the fear of impacting critical operations. This capability fosters innovation and allows for testing in a controlled environment, leading to better software and system development practices.

Augmented Data Security and Integrity

Expanding disk sizes also has implications for data security and integrity. Adequate disk space is essential for implementing comprehensive backup and recovery solutions, which are vital for data protection. With enough space to store backups, snapshots, and redundancy copies, you ensure that data can be restored quickly and accurately in the event of corruption or loss, thereby enhancing data security and integrity.

Requirements for expanding the disk size of VMware virtual machines

Expanding the disk size of VMware virtual machines involves a series of technical requirements and preparatory steps to ensure the process is successful and does not adversely affect your virtual environment. Here's a comprehensive list of requirements and considerations to keep in mind:

1. VMware Compatibility

  • Ensure that your version of VMware supports disk resizing. Most modern VMware products, like VMware vSphere, VMware Workstation, and VMware Fusion, support this feature, but it's always good to check compatibility.
  • The virtual machine hardware version must also support disk expansion. Newer hardware versions typically have broader support for disk resizing.

2. Virtual Machine State

  • The virtual machine should be powered off before attempting to resize its disk in most cases, especially if you're working with the system disk. Some VMware products may allow you to resize a non-system disk while the VM is running, but it's safer to perform this operation while the VM is powered down to avoid data corruption.

3. Backup

  • Before making changes to the virtual disk, it's critical to back up the VM or, at the very least, the data on the disk you plan to expand. This precaution ensures that you can restore the original state in case of any issues during the expansion process.

4. Disk Type

  • The type of virtual disk (VMDK for VMware products) impacts how it can be resized. For instance, disks provisioned as thick lazy zeroed or thick eager zeroed can be expanded, but there are different considerations for how the space is allocated and used.
  • Disks set up in a RAID configuration may have additional steps or considerations for expansion.

5. File System and Operating System Support

  • The file system within the VM must support resizing. For example, NTFS for Windows systems and ext3/ext4 for Linux systems commonly support resizing.
  • The operating system of the VM should also support disk expansion, both in terms of recognizing a larger disk and having the tools available to resize the file system to take advantage of the additional space.

6. Available Physical Storage

  • Ensure there is sufficient physical storage on the host system to accommodate the expanded virtual disk size. Expanding a virtual disk without enough physical storage can result in errors and potential data loss.

7. Tools and Utilities

  • Have the necessary tools and utilities ready. For Windows, this might include the Disk Management tool or the diskpart command-line tool. For Linux, tools like gparted or command-line utilities such as resize2fs may be required.

8. VMware Tools

  • VMware Tools should be installed and up to date within the VM. This software suite enhances the performance of the VM's operating system and improves management of the VM, including better handling of disk resizing.

How to increase disk size on VMware ESXi?

Increasing the disk size of a virtual machine (VM) in VMware ESXi involves several steps, from modifying the VM's properties to resizing the file system within the guest operating system to utilize the new space. Below is a step-by-step guide to safely increase the disk size of a VM hosted on VMware ESXi:

Before You Begin

  • Backup the VM: Always ensure you have a current backup of the VM and its data to avoid any potential data loss.
  • Power Off the VM: It's generally recommended to power off the VM before resizing its disk to prevent any data corruption.
  • Check Space Availability: Ensure the ESXi datastore has sufficient free space to accommodate the disk size increase.

Step 1: Increasing the Virtual Disk Size in VMware ESXi

  1. Log in to the ESXi Host Web Client:

    • Open a web browser and navigate to the IP address or hostname of your ESXi server. Log in using your credentials.
  2. Select the Virtual Machine:

    • In the navigator pane, click on "Virtual Machines".
    • Select the VM you wish to resize from the list.
  3. Edit Virtual Machine Settings:

    • With the VM selected, click on the "Actions" menu and choose "Edit Settings".
  4. Increase Disk Size:

    • In the Virtual Hardware tab, locate the hard disk you want to resize. Click on the expansion arrow to reveal the disk's properties.
    • In the "New size" field, enter the new size for your disk. The value must be larger than the current size.
    • Click "OK" to apply the changes.

Step 2: Resizing the Partition and File System within the Guest OS

After you've increased the virtual disk size, the next steps involve extending the file system within the guest operating system to use the additional space. The process varies depending on the OS running on your VM.

For Windows-based VMs:

  1. 1. Power on the VM and log in.
  2. 2. Open Disk Management: Right-click on "Start" and select "Disk Management".
  3. 3. Extend Volume:
    • Right-click on the volume you wish to extend (it should show unallocated space next to it).
    • Choose "Extend Volume" and follow the wizard to utilize the new space.

For Linux-based VMs:

  1. 1. Power on the VM and log in.
  2. 2. Identify the Disk: Use lsblk to identify the disk and partition you wish to resize.
  3. 3. Resize the Partition: Depending on your setup, you may need to use tools like fdisk or parted to delete and recreate the partition with a larger size. Be sure to start the new partition at the same sector as the old one to avoid data loss.
  4. 4. Resize the File System:
    • For ext2/3/4 file systems, use resize2fs /dev/sdXn (where sdXn is your partition).
    • For xfs file systems, use xfs_growfs /mount/point.

Step 3: Verifying the Disk Expansion

  • After resizing the partition and file system, verify that the OS recognizes the new disk size by checking the disk or partition properties.

This guide provides a general overview of expanding a virtual disk in VMware ESXi and the guest OS. Depending on your specific environment and operating system version, some steps may vary. Always consult VMware's official documentation and your OS's guidelines for disk management for the most accurate and detailed instructions.

How to increase disk size in VMware Workstation?

Increasing the disk size in VMware Workstation allows you to allocate more storage to a virtual machine (VM), providing additional space for applications, data, and system updates. VMware Workstation offers two main approaches to accomplish this: using the command line and through the VMware Workstation client interface. Below is a detailed guide on how to increase a virtual disk's size using both methods.

1: Expanding Virtual Disk Using the Command Line


  • Ensure VMware Workstation is installed.
  • Close the VMware Workstation application before proceeding.
  • Ensure the VM is powered off.


  1. Open Command Prompt or Terminal:

    • On Windows, open the Command Prompt as an administrator.
    • On Linux, open your Terminal.
  2. Navigate to VMware's Installation Directory:

    • On Windows, the default path is usually C:\Program Files (x86)\VMware\VMware Workstation.
    • On Linux, the vmware-vdiskmanager utility is typically found in /usr/bin or /usr/local/bin.
  3. Use the vmware-vdiskmanager Utility:

    • Run the following command to expand the virtual disk. Replace [new size] with the desired disk size in GB and [path to vmdk] with the path to the VM's VMDK file you wish to expand.

    For Windows:

    vmware-vdiskmanager -x [new size]GB "[path to vmdk]"

    For Linux:

    sudo vmware-vdiskmanager -x [new size]GB "[path to vmdk]"


    vmware-vdiskmanager -x 50GB "C:\VMs\Windows10\Windows10.vmdk"
  4. Verify: Start VMware Workstation and check the VM settings to ensure the disk size has increased as expected.

2: Expanding Virtual Disk Using the VMware Workstation Client


  • Ensure the VM is powered off.


  1. 1. Open VMware Workstation and select the VM you wish to expand.

  2. 2. VM Settings:

    • Right-click on the VM in the library and select "Settings" or select the VM and click on "Edit virtual machine settings".
  3. 3. Select the Hard Disk:

    • In the Hardware tab, select the hard disk you wish to expand.
  4. 4. Expand the Disk:

    • Click on the "Expand" button under "Disk utilities". Enter the new size for the disk in the "Maximum disk size (GB)" field. Make sure it is larger than the current size.
    • Click on the "Expand" button to start the expansion process.
  5. 5. Apply and Close:

    • Click "OK" to apply the changes and close the settings window.

Post-Expansion Steps for Both Methods

After expanding the virtual disk, you'll need to resize the partition within the guest operating system to utilize the new space. This process varies depending on whether your VM is running Windows, Linux, or another operating system. Generally, for Windows, you can use the Disk Management tool to extend the volume. For Linux, tools like gparted or command-line utilities (resize2fs for ext filesystems, xfs_growfs for XFS) can be used.

Common problems when increasing VMware disk size

Increasing the disk size of a VMware virtual machine can streamline operations and accommodate growing data needs. However, the process isn't without its potential pitfalls. Understanding these common problems can help you navigate the expansion smoothly and mitigate risks. Here are some of the most frequently encountered issues:

1. Insufficient Host Storage

  • Problem: Attempting to expand a virtual disk without enough physical storage on the host can lead to errors. VMware will not allow the disk to be expanded beyond the available physical storage.
  • Solution: Ensure there's enough physical storage on the host system before attempting to expand the virtual disk.

2. VMware Tools Out of Date

  • Problem: Outdated VMware Tools can cause issues with recognizing or utilizing the newly allocated disk space within the guest OS.
  • Solution: Update VMware Tools in the guest OS before proceeding with the disk expansion.

3. Disk Type Limitations

  • Problem: Certain disk types, such as preallocated (fixed size) disks or snapshots, may not be resizable or may require additional steps to resize.
  • Solution: Convert the disk to a growable type or merge snapshots before attempting to resize.

4. File System Limitations within the Guest OS

  • Problem: The file system on the VM's disk may not support being resized, or there might be a maximum size limit that's lower than the desired disk size.
  • Solution: Use file systems that support resizing, and ensure you're aware of the file system's limitations before expanding the disk.

5. VM Is Powered On or Locked

  • Problem: Trying to resize a disk while the VM is powered on or locked might not be possible or could lead to data corruption.
  • Solution: Ensure the VM is powered off and not in use or locked by any processes before attempting to resize the disk.

6. Incorrect Disk Resizing Operations

  • Problem: Incorrectly using disk management tools or commands can lead to data loss. For example, using fdisk or diskpart improperly when resizing the partition.
  • Solution: Familiarize yourself with the disk management tools and commands specific to the guest OS. Always back up data before proceeding.

7. Partition Does Not Extend Automatically

  • Problem: After increasing the disk size, the partition and file system within the guest OS do not automatically extend to use the new space.
  • Solution: Manually extend the partition and file system. This may involve using disk management tools in Windows (like Disk Management or diskpart) or command-line tools in Linux (like resize2fs or lvextend).

8. Performance Issues Post-Expansion

  • Problem: Expanding the disk size can sometimes lead to fragmented files or unoptimized storage use, affecting performance.
  • Solution: Perform disk defragmentation or optimization within the guest OS after resizing, especially if the OS is older or does not automatically handle fragmentation well.

Expanding partitions on a Windows VM: What's the process?

Expanding a partition on a Windows virtual machine (VM) after increasing the virtual disk size involves a few straightforward steps. This process is crucial to utilize the newly allocated space effectively. Here's how to do it, primarily using the built-in Disk Management tool in Windows:

Step 1: Increase the Virtual Disk Size

First, ensure that you've successfully increased the size of the VM's virtual disk through the VMware product you're using (vSphere, Workstation, etc.). Once done, the next steps will take place inside the Windows VM.

Step 2: Access Disk Management

  • Power on your Windows VM and log in.
  • Open the Run dialog by pressing Windows Key + R.
  • Type diskmgmt.msc and press Enter to open the Disk Management tool.

Step 3: Locate the Partition to Expand

  • In Disk Management, you'll see the expanded virtual disk with unallocated space at the end. Find the partition you want to expand (typically, this is the system partition or C: drive).

Step 4: Expand the Partition

  • Right-click on the partition you wish to expand (e.g., the C: drive) and select Extend Volume from the context menu. This launches the Extend Volume Wizard.
  • Click Next on the wizard's welcome screen.
  • Specify the amount of space to add to the partition. By default, it will select all available unallocated space, but you can adjust this according to your needs.
  • Click Next, then Finish to start the expansion process.

Additional Considerations

  • Back Up Your Data: Before making changes to partitions, it's wise to back up any important data to mitigate the risk of data loss.
  • VMware Tools: Ensure VMware Tools is installed and up to date in the VM. This software enhances the performance and management of virtual machines within VMware environments.
  • Windows Version: While the above steps are generally applicable to most recent versions of Windows (Windows 7, 8, 10, and Server editions), slight variations in the process or UI might occur. Always refer to specific guidance for your version of Windows if you encounter differences.
  • Disk Type Matters: These steps apply to basic disks. If your VM uses a dynamic disk or you're working with a volume that's part of a RAID array, additional steps or considerations may apply.

Expanding disk partitions in Linux Ubuntu: How to do it?

Expanding disk partitions in a Linux Ubuntu virtual machine (VM) involves several steps, especially after increasing the virtual disk's size via VMware ESXi or similar virtualization platforms. These steps allow the Linux OS to utilize the newly available disk space fully. Here's how you can do it through various methods:

Resizing a Virtual Disk Using the ESXi Command Line

Before expanding the disk partition in Ubuntu, you need to increase the virtual disk size:

  1. 1. Connect to the ESXi host via SSH using a tool like PuTTY (for Windows) or Terminal (for macOS and Linux).
  2. 2. Use the vmkfstools command to resize the VMDK file. The syntax is as follows:
    vmkfstools -X [new size]G [path_to_vmdk_file]
    Replace [new size] with the desired size in GB and [path_to_vmdk_file] with the actual path to the VMDK file of your Ubuntu VM.

Expanding a Linux Partition Using the Disks Utility

For a graphical interface method:

  1. 1. Open the Disks utility: You can find it by searching for "Disks" in the Ubuntu application menu.
  2. 2. Select the Disk: Click on the disk whose partition you want to expand.
  3. 3. Edit Partitions: Select the partition, then click the "gear" icon and choose "Resize".
  4. 4. Adjust Size: Drag the handles to adjust the partition size or enter the value manually, then click "Resize".

Extending Linux Partitions Using the Parted Tool

For a command-line method, the parted tool is very efficient:

  1. 1. Open Terminal.
  2. 2. Run sudo parted to start the tool.
  3. 3. Select the disk: select /dev/sda (replace /dev/sda with your disk identifier).
  4. 4. Resize the partition: resizepart PART_NUMBER END (replace PART_NUMBER with the number of the partition you want to resize and END with the new end point for the partition in MB or GB, e.g., 100% to use all available space).
  5. 5. Quit parted: quit.

Altering Disk Partition Size

Directly from the command line without parted, you can use fdisk or gdisk for GPT partitions. This involves deleting and recreating the partition with a larger size, without formatting, which keeps the data intact.

Using GParted on Live CD

  1. 1. Download the GParted Live CD image and attach it to the VM.
  2. 2. Boot from the Live CD.
  3. 3. Run GParted to resize the partitions graphically. It provides a user-friendly interface to resize and manage partitions.

Using LVM

If your Ubuntu VM uses Logical Volume Management (LVM), resizing can be more flexible:

  1. 1. Extend the physical volume: sudo pvresize /dev/sdaX, where /dev/sdaX is the physical volume.
  2. 2. Check the volume group name with vgdisplay.
  3. 3. Extend the logical volume: sudo lvextend -l +100%FREE /dev/myvg/mylv, replacing /dev/myvg/mylv with your volume group and logical volume path.
  4. 4. Resize the filesystem: sudo resize2fs /dev/myvg/mylv for ext3/ext4 filesystems.

Each method has its context and use cases. For direct disk expansion where the file system needs to grow with the partition, tools like parted, fdisk, or GParted are ideal. For systems using LVM, lvextend and resize2fs (or xfs_growfs for XFS filesystems) provide a powerful and flexible approach to managing disk space.

How to protect VMware virtual machine data?

DiskInternals VMFS Recovery is a comprehensive software tool designed to recover data from VMFS (Virtual Machine File System) drives used in VMware servers and setups. This can be particularly useful in scenarios where data has been lost, corrupted, or accidentally deleted from a VMware virtual machine. Below is a step-by-step guide on how to use DiskInternals VMFS Recovery to protect and recover your VMware virtual machine data:

Step 1: Preparation

  • Backup: Before proceeding, ensure you have backups of your current data if possible. Recovery operations can sometimes be risky.
  • Download and Install DiskInternals VMFS Recovery: Visit the DiskInternals website, download the latest version of VMFS Recovery, and install it on a Windows machine. This machine should have enough storage to recover and store the data from the VMFS drive.

Step 2: Connect to the VMware Drive

  • Direct Connection: If the VMFS drive is on a local machine, ensure it’s connected and recognized by Windows.
  • Remote Connection: For ESXi or vSphere managed drives, you may need network access to the server. DiskInternals VMFS Recovery can connect to VMFS volumes over FTP or SSH, provided you have the necessary credentials.

Step 3: Launch DiskInternals VMFS Recovery

  • Open DiskInternals VMFS Recovery.
  • The software will display a wizard to help you through the recovery process. If you prefer manual operation, you can close the wizard and use the graphical user interface.

Step 4: Scan the VMFS Drive

  • Locate the drive that contains your VMware VMFS volumes.
  • Right-click on the drive and select "Scan" for lost data. This process can take some time, depending on the size of the drive and the amount of data.

Step 5: Find and Recover Your Data

  • After the scan, browse the found files and folders. Look for the data you wish to recover.
  • DiskInternals VMFS Recovery allows you to preview recoverable files before recovery, which is particularly useful for verifying the integrity of data before proceeding with recovery.
  • Select the files or folders you want to recover and click "Recover". You'll be prompted to save the recovered data to a safe location on your Windows machine or an external storage device.

Step 6: Save Recovered Data

  • Choose a secure location to save the recovered data. It’s recommended to use an external drive or a different machine to avoid potential data overwriting on your current system.

Additional Tips:

  • Trial Version: DiskInternals offers a trial version of VMFS Recovery, which allows you to scan and preview recoverable files. However, you might need to purchase the full version to save the recovered data.
  • RAID Recovery: If your VMFS volume is on a RAID array that has failed, DiskInternals VMFS Recovery can also assist in reconstructing the RAID for data recovery.
  • Support: For complex scenarios, consider reaching out to DiskInternals support for assistance.

By following these steps, you can effectively use DiskInternals VMFS Recovery to protect and recover data from your VMware virtual machine environments, ensuring minimal downtime and loss in case of data emergencies.


In conclusion, managing and expanding VMware virtual machine (VM) disk sizes is a critical task for maintaining an efficient, flexible, and scalable IT infrastructure. Whether you're working with VMware ESXi, VMware Workstation, or any other VMware environment, understanding how to safely increase disk space and expand partitions is essential for accommodating growing data needs and optimizing VM performance. Tools like DiskInternals VMFS Recovery play a vital role in safeguarding VM data, offering robust solutions for data recovery in the event of loss or corruption.

The process of increasing a VM's disk size involves several key steps, from resizing the virtual disk within the VMware environment to extending the filesystem and partitions within the guest operating system. Each step requires careful attention to detail to avoid data loss and ensure that the additional space is fully utilized. Whether you're using graphical utilities or command-line tools, the ability to resize disks and partitions is a powerful capability for VMware administrators.

Recovery and protection of VM data with tools like DiskInternals VMFS Recovery underscore the importance of being prepared for potential data loss scenarios. By understanding how to recover lost or corrupted data, administrators can ensure the continuity and reliability of their virtual environments.

Ultimately, the ability to manage disk space and recover data efficiently contributes to the overall resilience and performance of VMware virtual machines. As virtual environments continue to grow in complexity and size, these skills and tools will remain indispensable for IT professionals tasked with maintaining and optimizing virtual infrastructure.


  • How do I increase the size of my virtual box disk?

    To adjust the size of a VirtualBox Virtual Hard Disk, initiate by accessing the VirtualBox Media Manager. This can be done by selecting the Tools option located on the left sidebar. Once inside, the resizing process is straightforward. Simply:

    • Choose the hard disk file you wish to resize.
    • Enter the desired new Size value.
    • Confirm the changes by clicking on the Apply button.
  • How to extend C drive in VMware?

    Expanding the C Drive in VMware on Windows Server

    • Navigate to Disk Management, right-click on the C drive, and choose “Extend Volume.”
    • In the Extend Volume Wizard, click “Next” to proceed.
    • Choose the disk that has the unallocated space intended for the system drive extension, then click on “Add” followed by “Next.”
  • The option to expand volume size is grayed out

    If the option to expand the volume size is grayed out, it often indicates a limitation due to the current disk layout or the absence of contiguous unallocated space adjacent to the volume you're attempting to expand. Here are some brief recommendations to address this issue:

    • Check for Contiguous Unallocated Space: Expansion is only possible if there is adjacent unallocated space to the right of the volume in Disk Management. If there's no such space, you'll need to rearrange partitions or clear space next to the target volume.
    • Convert to Dynamic Disk: If you're working with a Basic disk and the volume is at its maximum size, consider converting it to a Dynamic disk, which offers more flexibility for resizing. However, note that this might not be suitable for all environments, especially if dual-booting.
    • Ensure File System Support: The volume's file system might not support expansion, especially for older file systems. Make sure the file system type (e.g., NTFS, FAT32) supports being enlarged.
    • Delete and Extend: If possible, back up data from adjacent partitions and delete them to create unallocated space next to the target volume, then attempt the expansion again.
    • Check Virtual Disk Type: In virtual environments, ensure the virtual disk type supports resizing. Some types of virtual disks or configurations, especially those with snapshots or using certain types of thin provisioning, may limit your ability to resize.

    If these steps don't resolve the issue, consider consulting documentation for your operating system or virtualization platform, as there may be specific requirements or limitations at play.

  • The virtual machine doesn't recognize the new disk size after resizing

    If your virtual machine doesn't recognize the new disk size after resizing, follow these steps to troubleshoot and resolve the issue:

    1. 1. Reboot the Virtual Machine: Start by rebooting the VM. Sometimes, the OS needs a restart to recognize changes to the disk configuration.

    2. 2. Check Virtual Machine Tools: Ensure that VMware Tools (for VMware) or Guest Additions (for VirtualBox) are installed and up to date. These tools improve the integration between the host system and the VM, including disk resize recognition.

    3. 3. Verify Disk Resizing Process: Double-check that the disk resizing process was completed successfully. Ensure you've expanded the disk correctly within the hypervisor (e.g., VMware vSphere, VMware Workstation, VirtualBox).

    4. 4. Extend the File System within the VM:

      • For Windows: Use the Disk Management tool to extend the partition. Sometimes, the disk space is recognized but not automatically allocated to the existing partition.
      • For Linux: Use command-line tools like resize2fs for ext3/ext4 filesystems, or xfs_growfs for XFS, to extend the filesystem to occupy the newly allocated space.
    5. 5. Rescan Disks:

      • For Windows: In Disk Management, right-click on the Disk label (e.g., Disk 0) and select “Rescan Disks” to refresh the disk layout.
      • For Linux: Use the lsblk command to verify the disk size and resize2fs or similar commands to adjust the filesystem.
    6. 6. Check for Snapshots: If you're using a VMware product, ensure there are no snapshots of the VM. Resizing a disk with existing snapshots can prevent the OS from recognizing the new size. If necessary, merge or delete snapshots where appropriate.

    7. 7. Consult VM and OS Logs: Review the logs of the virtual machine and the guest operating system for any errors or warnings related to disk operations, which can provide insights into why the new disk size isn't recognized.

  • Disk operation failed: Msg.Fileio.Lock

    The "Disk operation failed: Msg.Fileio.Lock" error in a VMware environment typically indicates that the VMware system cannot access a virtual disk file because it's locked or in use by another process. This can happen during operations like starting a VM, taking a snapshot, or performing disk maintenance tasks. To resolve this issue, consider the following steps:

    1. 1. Identify and Terminate the Locking Process:

      • Ensure no other VMs are mistakenly configured to use the same disk file.
      • If the disk is shared among VMs, verify that it's not being accessed or modified by another VM.
    2. 2. Check for Running Snapshots:

      • Ensure there are no active snapshots being taken or operations being performed on the VM. Such actions can lock the disk file.
      • If snapshots exist, wait for any snapshot operations to complete or merge/delete snapshots if necessary.
    3. 3. Restart the VMware Hostd Service:

      • On ESXi, restart the management agents. This can release locks without needing to reboot the entire host. Use the commands:
        /etc/init.d/hostd restart /etc/init.d/vpxa restart
      • On Workstation, you might need to restart the VMware service or the entire host machine.
    4. 4. Use the VMware Command Line:

      • On ESXi, use the vmkfstools command to check for locks and attempt to release them:
        vmkfstools -D /vmfs/volumes/datastore_name/VM_folder/disk_file.vmdk

      This command prints lock information to the ESXi host logs, which can help identify the locking process.

    5. 5. Check VMFS Datastore:

      • Ensure the VMFS datastore where the disk resides is not full or read-only. A full datastore can prevent operations that require disk space allocation.
    6. 6. Power Off Other VMs:

      • If possible, safely power off other VMs running on the same host to release any locks they might hold on shared resources.
    7. 7. Verify Disk File Permissions:

      • Ensure the virtual disk files have the correct permissions. Incorrect file permissions can prevent access to the disk.
    8. 8. Examine the VM's Log Files:

      • Check the VM's log files for any additional clues about the lock. Log files can be found in the VM's directory on the datastore.
    9. 9. Restart the VMware ESXi Host:

      • If none of the above steps resolve the issue, a last resort is to restart the entire ESXi host. This should clear any locks but can impact all running VMs on the host.
    10. 10. Consult VMware Support:

      • If the problem persists, consult VMware's knowledge base or contact VMware support for further assistance.

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