To merge two disks in Ubuntu, you typically use Logical Volume Management (LVM) or file system tools. Here’s how to do it using LVM:

Using LVM

1. Install LVM (if not already installed):

   sudo apt update sudo apt install lvm2 

2. Create Physical Volumes:

   sudo pvcreate /dev/sdX /dev/sdY 

   Replace /dev/sdX and /dev/sdY with your actual disk identifiers.

3. Create a Volume Group:

   sudo vgcreate my_volume_group /dev/sdX /dev/sdY 

4. Create a Logical Volume:

   sudo lvcreate -l 100%FREE -n my_logical_volume my_volume_group 

5. Format the Logical Volume:

   sudo mkfs.ext4 /dev/my_volume_group/my_logical_volume 

6. Mount the Logical Volume:

   sudo mkdir /mnt/my_mount_point sudo mount /dev/my_volume_group/my_logical_volume /mnt/my_mount_point 

7. Update /etc/fstab (optional for persistent mounting):

   echo '/dev/my_volume_group/my_logical_volume /mnt/my_mount_point ext4 defaults 0 2' | sudo tee -a /etc/fstab 

Using GParted (Graphical Tool)

1. Install GParted:

   sudo apt update sudo apt install gparted 

2. Run GParted:

   sudo gparted 

3. Select the Disks:

   • Identify the disks you want to merge.
   • Resize and move partitions as necessary to create unallocated space.

4. Create a New Partition:

   • Use the unallocated space to create a new partition.

5. Apply Changes:

   • Click the green checkmark to apply changes.

Important Notes

• Backup Important Data: Always back up data before modifying disk partitions.
• Data Loss Risk: Merging disks can lead to data loss if not done correctly. Proceed with caution.

If you need further assistance or a specific use case, let me know!