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Chapter 18. Resizing a partition with parted

Using the parted utility, extend a partition to utilize unused disk space, or shrink a partition to use its capacity for different purposes.

Prerequisites

  • Back up the data before shrinking a partition.
  • If the partition you want to create is larger than 2TiB, format the disk with the GUID Partition Table (GPT).
  • If you want to shrink the partition, first shrink the file system so that it is not larger than the resized partition.
Note

XFS does not support shrinking.

Procedure

  1. Start the parted utility:

    # parted block-device
  2. View the current partition table:

    # (parted) print

    From the partition table, determine:

    • The minor number of the partition.
    • The location of the existing partition and its new ending point after resizing.
  3. Resize the partition:

    # (parted) resizepart 1 2GiB
    • Replace 1 with the minor number of the partition that you are resizing.
    • Replace 2 with the size that determines the new ending point of the resized partition, counting from the beginning of the disk. You can use size suffixes, such as 512MiB, 20GiB, or 1.5TiB. The default size is in megabytes.
  4. View the partition table to confirm that the resized partition is in the partition table with the correct size:

    # (parted) print
  5. Exit the parted shell:

    # (parted) quit
  6. Verify that the kernel registers the new partition:

    # cat /proc/partitions
  7. Optional: If you extended the partition, extend the file system on it as well.