9edd1e4c_NTFS__Logical_Disk_Manager__Type_of_Container_
[Extend:] To Extend, you will need more space on the original disks, or more space on others. [Add Mirror:] Volume "P:" already has a mirror, so if you were to mirror it again, you would need to make it on a different disk than the existing mirror and will result in a third copy of the volume. This will further increase the volume's fault tolerance [Type of Container:] 
Mirror
S i m p l e
S p a n n e d
S t r i p e
M i r r o r
S t r i p e w i t h p a r i t y
M i r r o r e d S t r i p e ( n o t s h o w n )
NTFS: Logical Disk Manager