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Backing up and Restoring Partition Tables

# Backup
sudo dd if=/dev/sda of=mbrbackup bs=512 count=1

# Restore
sudo dd if=mbrbackup of=/dev/sda bs=512 count=1

For GPT systems, we can use:

sudo sgdisk --backup=/tmp/sda_backup /dev/sda

Other tools that can be used:

  • fdisk
  • sfdisk
  • parted
  • gdisk

We can see what partitions:

cat /proc/partitions