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Increasing the size of a LUN

Beginning in ONTAP 9.5, you can grow your LUN up to 16 TB regardless of its original size.

About this task

For example, in ONTAP 9.5 or later, if you create a 100 GB LUN, you can grow that LUN to the maximum LUN size of 16 TB. The actual LUN size might vary slightly based on the OS type of the LUN. No LUN can exceed the 16 TB maximum size limit regardless of the version of ONTAP in which it was created.

You do not need to take the LUN offline to increase the size. However, after you have increased the size, you must rescan the LUN on the host for the host to recognize the change in size.

See the Command Reference page for the lun resize command for more information about resizing a LUN.

  1. Increase the size of the LUN: lun resize -vserver vserver_name -volume volume_name -lun lun_name -size lun_size
  2. Verify the increased LUN size: lun show -vserver vserver_name
  3. Rescan the LUN on the host.
  4. Follow your host documentation to make the newly created LUN size visible to the host file system.