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 152         <h1>Storage management architecture</h1>
 153         <p>
 154       The storage management APIs are based around 2 core concepts
 155     </p>
 156         <ol><li>
 157         <strong>Volume</strong> - a single storage volume which can
 158         be assigned to a guest, or used for creating further pools. A
 159         volume is either a block device, a raw file, or a special format
 160         file.
 161       </li><li>
 162         <strong>Pool</strong> - provides a means for taking a chunk
 163         of storage and carving it up into volumes. A pool can be used to
 164         manage things such as a physical disk, a NFS server, a iSCSI target,
 165         a host adapter, an LVM group.
 166       </li></ol>
 167         <p>
 168       These two concepts are mapped through to two libvirt objects, a
 169       <code>virStorageVolPtr</code> and a <code>virStoragePoolPtr</code>,
 170       each with a collection of APIs for their management.
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