Can Not Connect The Virtual Device Sata01 Because No Corresponding Device Is Available On The Host. – VirtualBox Device Mapping Errors

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Getting “can not connect the virtual device sata01 because no corresponding device is available on the host” suggests your virtual machine configuration references a disk that doesn’t exist. This error typically appears in VMware Workstation or similar hypervisors when you try to power on a VM that was moved, copied, or had its storage changed. It stops your virtual machine from starting, which can be frustrating if you need urgent access.

Don’t worry. This issue is fixable with a few simple steps. We’ll walk through what causes it, how to resolve it, and how to prevent it in the future.

What Does This Error Mean Exactly?

The error message tells you that your virtual machine is trying to connect to a virtual disk (SATA controller, port 01) but the host computer cannot find the actual file for that disk. Think of it like a DVD player trying to play a disc that isn’t there. The VM’s settings expect a specific .vmdk or .iso file, but that file is missing or renamed.

Common scenarios include:

  • You moved the VM folder to a different location
  • You deleted or renamed the virtual disk file
  • The disk file is stored on an external drive that isn’t connected
  • You imported a VM from another system without copying all files
  • A snapshot or linked clone broke the file path

Each of these leads to the same result: the host cannot locate the device, so it throws the error.

Can Not Connect The Virtual Device Sata01 Because No Corresponding Device Is Available On The Host.

This is the exact error you see in the VMware interface. It usually appears in a pop-up window when you attempt to start the virtual machine. The VM may have multiple SATA controllers, so you might see sata00, sata01, or similar numbers depending on your configuration.

Let’s break down the fix into clear steps.

Step 1: Identify The Missing Disk

First, you need to find out which disk is causing the problem. Open your virtual machine settings (right-click the VM and select Settings). Look under the “Hardware” tab for any SATA devices that show a yellow warning triangle or have an empty file path.

Common signs of the missing disk:

  • The “Disk file” field is blank or shows “Not available”
  • The device is listed as “Hard Disk” but with no size
  • You see a red X next to the device

Write down the exact filename or path that was originally configured. If you don’t see it, check the .vmx configuration file (more on that later).

Step 2: Locate The Actual Disk File

Now search your host system for the missing .vmdk file. It might be in a different folder, on another drive, or renamed. Use Windows Search or File Explorer to look for files ending in .vmdk. If you have multiple VMs, check each folder carefully.

If you cannot find the file, it may have been deleted. In that case, you have two options:

  • Restore from backup (if you have one)
  • Create a new virtual disk and reinstall the OS

If you find the file but it’s in a different location, note the full path. You’ll need to update the VM settings to point to this new location.

Step 3: Update The VM Settings

Once you know where the disk file is, you can fix the VM configuration. Here’s how:

  1. Shut down the virtual machine completely (if it’s partially running)
  2. Right-click the VM and select “Settings”
  3. Click on the problematic SATA device (e.g., “SATA 01”)
  4. Click “Remove” to delete the broken device
  5. Click “Add” at the bottom, then choose “Hard Disk”
  6. Select “Use an existing virtual disk”
  7. Browse to the correct .vmdk file and select it
  8. Click “Finish” and then “OK” to save

This replaces the broken reference with a working one. Try starting the VM again.

Step 4: Edit The .Vmx File Directly (Advanced)

If the VM settings won’t open or the error persists, you can edit the configuration file manually. The .vmx file is a plain text file that stores all VM settings. Here’s how:

  1. Locate the VM folder on your host
  2. Find the file with .vmx extension (e.g., “Windows 10.vmx”)
  3. Make a backup copy first (just in case)
  4. Open the .vmx file with Notepad or any text editor
  5. Search for lines containing “sata01” or “scsi01” (depending on your controller type)
  6. Look for lines like: sata0:1.fileName = "missingdisk.vmdk"
  7. Change the filename to the correct one, or remove the entire line if the disk is not needed
  8. Save the file and close it
  9. Try starting the VM again

Be careful when editing .vmx files. One wrong character can break the VM. Always keep a backup.

Step 5: Check For External Drives Or Network Shares

Sometimes the virtual disk is stored on an external USB drive or a network share. If that drive is not connected, you get the error. Connect the drive and ensure it has the same drive letter (e.g., E:\). If the drive letter changed, you’ll need to update the VM settings as described in Step 3.

For network shares, make sure the share is accessible and the path is correct. You may need to map the network drive with the same letter as before.

Step 6: Remove Orphaned Snapshots

Snapshots can cause this error if the underlying disk file was moved or deleted. If you have snapshots, try deleting them (consolidating) to simplify the disk chain. Here’s how:

  1. Open the Snapshot Manager (VM > Snapshot > Snapshot Manager)
  2. Select the current snapshot and click “Delete All”
  3. Confirm the action
  4. Try starting the VM

Note: Deleting snapshots merges the changes into the base disk. This can take time and requires enough free disk space.

Preventing This Error In The Future

Once you’ve fixed the issue, take steps to avoid it happening again. Here are some best practices:

  • Always copy the entire VM folder when moving a VM
  • Use relative paths in .vmx files (e.g., just the filename, not a full path)
  • Keep virtual disks on the same drive as the VM configuration
  • Backup your VMs regularly, including .vmdk files
  • Label external drives clearly and always use the same drive letter
  • Avoid renaming or deleting .vmdk files manually

If you frequently move VMs between hosts, consider using shared storage or exporting/importing VMs properly.

Alternative Solutions For Specific Hypervisors

While this error is most common in VMware Workstation, similar issues appear in other hypervisors. Here are quick fixes for each:

VMware Workstation Pro/Player

Use the “Browse” option in VM settings to locate the missing disk. If the disk is completely gone, you can create a new blank disk and attach it, then reinstall the OS. For linked clones, ensure the parent VM is accessible.

Oracle VirtualBox

VirtualBox shows a similar error: “Cannot open the medium unit.” Open the Storage settings, remove the broken controller, and re-add the correct .vdi file. VirtualBox also lets you “Release” a disk and then reattach it.

Microsoft Hyper-V

Hyper-V uses .vhdx files. If you get an error about a missing virtual hard disk, go to VM Settings, select the SCSI controller, and change the path to the correct .vhdx file. You may need to “Inspect” the disk first to verify it’s valid.

What If The Disk File Is Corrupted?

Sometimes the error occurs because the .vmdk file is damaged. If you suspect corruption, try these steps:

  • Run vmware-vdiskmanager -R to repair the disk (Windows)
  • Use third-party tools like DiskInternals VMFS Recovery
  • Restore from a backup
  • If the disk contains important data, consider professional recovery services

Corrupted disks are rare but serious. Always keep multiple backups.

Common Mistakes To Avoid

When fixing this error, people often make things worse. Avoid these pitfalls:

  • Deleting the .vmx file or other configuration files
  • Editing the .vmx file without a backup
  • Creating a new disk and attaching it without removing the old one (causes duplicate drive letters)
  • Ignoring the error and trying to force-start the VM (can cause crashes)
  • Assuming the disk is lost when it’s just in a different folder

Take your time and follow the steps methodically.

Frequently Asked Questions

Can I ignore this error and still use the VM?

No. The VM will not start until the missing device is resolved. You must either provide the correct disk or remove the broken device from settings.

What if I don’t have the original .vmdk file?

If the disk file is permanently lost, you cannot recover the data. You will need to create a new virtual disk and reinstall the operating system. Always backup important VMs.

Why does this error happen after moving the VM folder?

When you move a VM, the file paths inside the .vmx file become invalid. The hypervisor looks for the disk at the old location. You must update the paths or use relative paths to avoid this.

Can this error occur with SCSI controllers too?

Yes. The same error can happen with SCSI devices (e.g., “scsi01”). The fix is identical: locate the missing disk and update the VM settings.

Is there a way to automatically fix this error?

Some third-party tools claim to repair VM configurations, but manual fixing is safer. VMware Workstation has a “Repair” option in some versions, but it doesn’t always work. The best approach is to manually update the disk path.

Final Thoughts

The “can not connect the virtual device sata01 because no corresponding device is available on the host” error is a common roadblock, but it’s almost always fixable. Start by identifying the missing disk, then either relocate it or remove the broken reference. With the steps above, you should have your VM running again in minutes.

Remember to keep backups and use relative paths to prevent future issues. If you get stuck, check the VMware community forums or consult your hypervisor’s documentation. You’ve got the tools to solve this—just take it step by step.

Now go ahead and fix that VM. You’ll be back to work before you know it.