Chapter 3. Anatomy of LVM

This diagram gives a overview of the main elements in an LVM system:


+-- Volume Group --------------------------------+
|                                                |
|    +----------------------------------------+	 |
| PV | PE |  PE | PE | PE | PE | PE | PE | PE |	 |
|    +----------------------------------------+	 |
|      .       	  .    	     . 	      .	       	 |
|      .          .    	     .        .	         |
|    +----------------------------------------+	 |
| LV | LE |  LE | LE | LE | LE | LE | LE | LE |	 |
|    +----------------------------------------+	 |
|            .          .        .     	   .     |
|            . 	        .        .     	   .     |
|    +----------------------------------------+	 |
| PV | PE |  PE | PE | PE | PE | PE | PE | PE |	 |
|    +----------------------------------------+	 |
|                                                |
+------------------------------------------------+

         

Another way to look at is this (courtesy of Erik Bågfors on the linux-lvm mailing list):


    hda1   hdc1      (PV:s on partitions or whole disks)                        
       \   /                                                                    
        \ /                                                                     
       diskvg        (VG)                                                       
       /  |  \                                                                  
      /   |   \                                                                 
  usrlv rootlv varlv (LV:s)
    |      |     |                                                              
 ext2  reiserfs  xfs (filesystems)                                        

         

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