Comment convertir un disque de MBR à GPT

Comment convertir un disque de MBR à GPT

Table of Contents:

1. Introduction 1.1 What is MBR and GPT? 1.2 Why Convert from MBR to GPT or GPT to MBR?
2. Accessing Disk Management 2.1 Method 1: Using Start Menu Search 2.2 Method 2: Using Computer Management 2.3 Method 3: Using Control Panel
3. Checking the Current Disk Style 3.1 Verifying MBR Style 3.2 Verifying GPT Style
4. Preparing for Conversion 4.1 Backing Up Data 4.2 Deleting Volumes
5. Converting from MBR to GPT
6. Converting from GPT to MBR
7. Formatting the Disk 7.1 Quick Format vs Full Format
8. Enabling File and Folder Compression
9. Verifying the Converted Disk Style
10. Conclusion

How to Convert a Disk from MBR to GPT or GPT to MBR

Introduction

Converting a disk from MBR (Master Boot Record) to GPT (GUID Partition Table) or vice versa can be necessary for various reasons. In this guide, we will explain what MBR and GPT are and why You might need to convert between them. We will walk you through the steps to convert a disk using Disk Management in Windows.

Accessing Disk Management

Before we can begin the conversion process, we need to access Disk Management. There are multiple ways to do this:

Method 1: Using Start Menu Search

• Click on the Start button.
• Type "disk management" in the search bar.
• Click on "Create and format hard disk partitions."

Method 2: Using Computer Management

• Press the Windows key + R to open the Run dialog box.
• Type "compmgmt.msc" and press Enter.
• In the Computer Management window, double-click on "Disk Management."

Method 3: Using Control Panel

• Click on the Start button.
• Type "control panel" in the search bar.
• Click on "Control Panel" to open it.
• Change the view to "Large icons" if necessary.
• Click on "Administrative Tools" and then double-click on "Computer Management."
• In the Computer Management window, click on "Disk Management."

Checking the Current Disk Style

Before proceeding with the conversion, it's important to verify the current style of the disk. This will help us determine whether the disk is already in the desired style or if it needs to be converted.

Verifying MBR Style

• In Disk Management, locate the disk you want to check.
• Right-click on the disk and select "Properties."
• Go to the "Volumes" tab.
• If the partition style is listed as MBR, then the disk is currently using the MBR style.

Verifying GPT Style

• In Disk Management, locate the disk you want to check.
• Right-click on the disk and select "Properties."
• Go to the "Volumes" tab.
• If the partition style is listed as GPT, then the disk is currently using the GPT style.

Preparing for Conversion

Before converting the disk, it's essential to back up any data on the disk as the conversion process will delete all existing data. Once you have backed up your data, follow these steps:

1. In Disk Management, select the volume on the disk you want to convert.
2. Right-click on the volume and choose "Delete Volume."
3. Confirm the deletion, as this will erase all data on the disk.

Converting from MBR to GPT

1. In Disk Management, right-click on the disk you want to convert.
2. Click on "Convert to GPT Disk."
3. A confirmation prompt will appear; click "Yes" to proceed.
4. Wait for the conversion process to complete. Once finished, the disk will be in the GPT style.

Converting from GPT to MBR

1. In Disk Management, right-click on the disk you want to convert.
2. Click on "Convert to MBR Disk."
3. A confirmation prompt will appear; click "Yes" to proceed.
4. Wait for the conversion process to complete. Once finished, the disk will be in the MBR style.

Formatting the Disk

After the conversion, the disk will need to be formatted before it can be used. Follow these steps to format the disk:

1. Right-click on the unallocated space of the converted disk.
2. Click on "New Simple Volume."
3. Follow the on-screen instructions to create a new volume.
4. Specify the desired file system (NTFS is recommended) and assign a drive letter.
5. Perform a quick format of the volume unless the disk has Never been formatted before. In that case, a full format may be necessary.

Enabling File and Folder Compression

If required, you can enable file and folder compression on the formatted disk. This feature helps save disk space by compressing files and folders. To enable compression:

1. Right-click on the formatted volume and select "Properties."
2. Go to the "General" tab and click on "Advanced."
3. In the "Advanced Attributes" window, check the box that says "Compress contents to save disk space." Click "OK" to Apply the changes.

Verifying the Converted Disk Style

To confirm that the disk has been successfully converted to the desired style:

1. In Disk Management, right-click on the converted disk and select "Properties."
2. Go to the "Volumes" tab.
3. Verify that the partition style Mentioned matches the style you converted to (GPT or MBR).

Conclusion

Converting a disk from MBR to GPT or GPT to MBR can be done easily using the Disk Management tool in Windows. By following the steps outlined in this guide, you can switch between the different partition styles and format the disk according to your requirements. Remember to back up your data before converting and proceed with caution to avoid any accidental data loss.

Highlights:

• Understand the differences between MBR and GPT partition styles.
• Access Disk Management through various methods.
• Verify the current disk style before conversion.
• Prepare for conversion by backing up data and deleting volumes.
• Convert from MBR to GPT or GPT to MBR using Disk Management.
• Format the converted disk and enable file and folder compression if needed.
• Verify the converted disk style in Disk Management properties.

FAQ:

Q: Can I convert a disk from MBR to GPT without losing data? A: No, the conversion process involves deleting all existing data on the disk. It is crucial to back up your data before proceeding.

Q: How long does it take to convert a disk from MBR to GPT? A: The conversion process is usually quick and can be completed within a few minutes.

Q: Do I need to format the disk after conversion? A: Yes, the converted disk needs to be formatted before it can be used. You can choose to perform a quick format or a full format depending on your requirements.

Q: Can I convert a boot disk from MBR to GPT? A: Converting a boot disk from MBR to GPT requires additional steps and may not be suitable for all systems. It is recommended to consult the manufacturer's documentation or seek professional assistance for such conversions.