How to convert mbr to gpt in linux?

I ran into an error at step 15 (grub-install):

That's because I was running off a Live USB system, trying to fixup the drive at /dev/sda.

The following changes worked for me:

Step 11:

Step 12: make this change to /mnt/a/etc/fstab instead of /etc/fstab.

Step 13:

Step 14: as written

Step 15:

Master Boot Record (MBR) disks use the standard BIOS partition table. GUID partition table (GPT) disks use the Unified Extensible Firmware Interface (UEFI). One advantage of GPT disks is that you can have more than four partitions on each disk. GPT is also required for disks larger than 2 terabytes (TB).

You can change a disk from MBR to GPT partition format as long as the disk contains no partitions or volumes.

To complete the disk conversion by using Disk Management, follow these steps.

The process notifies you when the conversion completes.

To complete the disk conversion from the command line with the diskpart disk partition process, follow these steps.

The diskpart process notifies you when the conversion completes.

The following table shows a summary of the commands for the diskpart process.

As an alternate approach, you can use the MBR2GPT.EXE tool to convert the MBR disk to the GPT partition format. Keep in mind that the tool can be more complicated to use than the diskpart process. For details, see Convert MBR partition to GPT.

Yes, you can convert MBR to GPT on Linux without losing data. Fortunately, the solution turned out to be a one-line command run from a Linux-based boot CD (or boot USB) that could save all the deleting and restoring processes of data.

GPT (GUID Partition Table) partitioning is more reliable than MBR (Master Boot Record) partitioning, enabling larger and more robust data protection. The MBR scheme with 32-bit entries allows a maximum disk size of only 2 TB. In addition, only four primary partitions are permitted. On the other hand, the GPT structure supports partitions larger than 2.2TB. That is why converting MBR to GPT is significant, as MBR no longer supports larger disks. With GPT partitions, the latest 64-bit distributions support UEFI systems.

To convert an MBR disk to GPT, we'll use a GPT-aware program like gptfdisk or gdisk. The gdisk tool is a text-based menu-driven program for partition table creation and manipulation.

Step 1. Install gdisk on your Linux computer.

First, you must install gdisk on your system. Run the following command to install it:

sudo apt install gdisk -y

After installing gdisk, proceed with the following steps:

Step 2. Make a list of and identify the disks.

To list the disks in your Linux system, run the following command.

sudo fdisk -l

Scroll through the output of this command and find the disk needed to convert from MBR to GPT.

Step 3. Run the gdisk utility.

In your terminal, type the following command:

sudo gdisk /dev/sda1

Or make use of

sudo gdisk

It will prompt you to enter the disk name. Enter the disk name and then press Return. This command will now scan and display the partition table on this partition.

(Remember to replace /dev/sda1 with the correct system drive, which may be /dev/sda on many systems.)

Step 4. Run the command to create a GPT partition table.

Enter w and then tap Return. The GPT partition table will be written to the specified disk. If prompted, press y to confirm your selection.

Step 5. Confirm the conversion.

The disk has now been converted from MBR to GPT. You can check this by running the following command.

sudo gdisk /dev/sda1

Don't worry about losing your important files after the MBR to GPT conversion process. A professional data recovery software such as Wondershare Recoverit can help recover deleted or lost data from a Linux computer.

Step 1. Select Linux Data Recovery.

Launch Wondershare Recoverit after the installation. Then, select NAS and Linux Recover on the left panel.

Step 2. Connect Your Linux PC With Recoverit.

Enter the information of your Linux to create a connection between the Linux and the software. Click Connect. After the connection is successful, Recoverit will start scanning the Linux.

Step 3. Preview and Recover.

During the scanning, you can filter and preview any files displayed on the screen to find your desired ones quickly.

Finally, select the files you want to restore and click “Recover” to save them to a safe location.

• Install gdisk on your Linux computer.
• Make a list of and identify the disks.
• Run the gdisk utility.
• Run the command to create a GPT partition table.
• Confirm the conversion.
• Select Linux Data Recovery.
• Connect Your Linux PC With Recoverit.
• Preview and Recover.