Previous Page: NWCONFIG-X-220: The partition table on drive number appears to be invalid. It is possible that you have not chosen the correct driver. If valid data does exist on this drive, and you do not want it destroyed, indicate No in the Confirm box that follows this message.  Next Page: NWCONFIG-X-225: This segment exists on disk. Its size cannot be modified unless you delete and reassign it.

NWCONFIG-X-221: This disk partition is out of date with respect to other mirror groups and must be resynchronized before it can be used.

Source:  NWCONFIG.NLM

Explanation:  The disk partition cannot be accessed because it is not synchronized.

Action:  Resynchronize the disk partition by using F3 in the mirror list.

  Previous Page: NWCONFIG-X-220: The partition table on drive number appears to be invalid. It is possible that you have not chosen the correct driver. If valid data does exist on this drive, and you do not want it destroyed, indicate No in the Confirm box that follows this message.  Next Page: NWCONFIG-X-225: This segment exists on disk. Its size cannot be modified unless you delete and reassign it.