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+.. _zfs:
+
+zfs
+***
+
+The zfs class is used to manage and retrieve information about ZFS pools.
+
+Every zfs class request contains the following parameters:
+
++---------------------------------+---------------+----------------------------------------------------------------------------------------------------------------------+
+| **Parameter**                   | **Value**     | **Description**                                                                                                      |
+|                                 |               |                                                                                                                      |
++=================================+===============+======================================================================================================================+
+| id                              |               | any unique value for the request; examples include a hash, checksum, or uuid                                         |
+|                                 |               |                                                                                                                      |
++---------------------------------+---------------+----------------------------------------------------------------------------------------------------------------------+
+| name                            | zfs           |                                                                                                                      |
+|                                 |               |                                                                                                                      |
++---------------------------------+---------------+----------------------------------------------------------------------------------------------------------------------+
+| namespace                       | sysadm        |                                                                                                                      |
+|                                 |               |                                                                                                                      |
++---------------------------------+---------------+----------------------------------------------------------------------------------------------------------------------+
+| action                          |               | supported actions include "list_pools"                                                                               |
+|                                 |               |                                                                                                                      |
++---------------------------------+---------------+----------------------------------------------------------------------------------------------------------------------+
+
+The rest of this section provides examples of the available *actions* for each type of request, along with their responses. 
+
+.. index:: list_pools, zfs
+
+.. _List Pools:
+
+List Pools
+==========
+
+The "list_pools" action lists pool information. For each ZFS pool, the response includes the pool name, the amount of space that has been physically allocated, whether or not an alternate
+root has been defined, capacity (percent used), the deduplication ratio, amount of uninitialized space (expandsz, which usually applies to LUNs), percentage of fragmentation, amount of free
+space, pool health, and total size. This action is the equivalent of running :command:`zpool list` from the command line.
+
+**REST Request**
+
+.. code-block:: json
+
+ PUT /sysadm/zfs
+ {
+   "action" : "list_pools"
+ }
+
+**WebSocket Request**
+
+.. code-block:: json
+
+ {
+   "namespace" : "sysadm",
+   "args" : {
+      "action" : "list_pools"
+   },
+   "name" : "zfs",
+   "id" : "fooid"
+ }
+
+**Response**
+
+.. code-block:: json
+
+ {
+  "args": {
+    "tank": {
+      "alloc": "71.8G",
+      "altroot": "-",
+      "cap": "32%",
+      "dedup": "1.00x",
+      "expandsz": "-",
+      "frag": "18%",
+      "free": "148G",
+      "health": "ONLINE",
+      "size": "220G"
+    }
+  },
+  "id": "fooid",
+  "name": "response",
+  "namespace": "sysadm"
+ }
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