diff --git a/api/src/org/apache/cloudstack/api/command/admin/storage/UpdateStoragePoolCmd.java b/api/src/org/apache/cloudstack/api/command/admin/storage/UpdateStoragePoolCmd.java
index 2ecb90f69c7..f04ecbc402a 100644
--- a/api/src/org/apache/cloudstack/api/command/admin/storage/UpdateStoragePoolCmd.java
+++ b/api/src/org/apache/cloudstack/api/command/admin/storage/UpdateStoragePoolCmd.java
@@ -47,6 +47,13 @@ public class UpdateStoragePoolCmd extends BaseCmd {
     @Parameter(name=ApiConstants.TAGS, type=CommandType.LIST, collectionType=CommandType.STRING, description="comma-separated list of tags for the storage pool")
     private List<String> tags;
 
+    @Parameter(name=ApiConstants.CAPACITY_IOPS, type=CommandType.LONG,
+               required=false, description="IOPS CloudStack can provision from this storage pool")
+    private Long capacityIops;
+
+    @Parameter(name=ApiConstants.CAPACITY_BYTES, type=CommandType.LONG,
+               required=false, description="bytes CloudStack can provision from this storage pool")
+    private Long capacityBytes;
 
     /////////////////////////////////////////////////////
     /////////////////// Accessors ///////////////////////
@@ -60,6 +67,14 @@ public class UpdateStoragePoolCmd extends BaseCmd {
         return tags;
     }
 
+    public Long getCapacityIops() {
+        return capacityIops;
+    }
+
+    public Long getCapacityBytes() {
+        return capacityBytes;
+    }
+
     /////////////////////////////////////////////////////
     /////////////// API Implementation///////////////////
     /////////////////////////////////////////////////////
diff --git a/engine/api/src/org/apache/cloudstack/storage/datastore/db/PrimaryDataStoreDao.java b/engine/api/src/org/apache/cloudstack/storage/datastore/db/PrimaryDataStoreDao.java
index 669dd25f5d3..38dd884eff1 100644
--- a/engine/api/src/org/apache/cloudstack/storage/datastore/db/PrimaryDataStoreDao.java
+++ b/engine/api/src/org/apache/cloudstack/storage/datastore/db/PrimaryDataStoreDao.java
@@ -28,7 +28,6 @@ import com.cloud.utils.db.GenericDao;
  * Data Access Object for storage_pool table
  */
 public interface PrimaryDataStoreDao extends GenericDao<StoragePoolVO, Long> {
-
     /**
      * @param datacenterId -- the id of the datacenter (availability zone)
      */
@@ -42,19 +41,16 @@ public interface PrimaryDataStoreDao extends GenericDao<StoragePoolVO, Long> {
     /**
      * Set capacity of storage pool in bytes
      * @param id pool id.
-     * @param capacity capacity in bytes
+     * @param capacityBytes capacity in bytes
      */
-    void updateCapacity(long id, long capacity);
+    void updateCapacityBytes(long id, long capacityBytes);
 
     /**
-     * Set available bytes of storage pool in bytes
-     *
-     * @param id
-     *            pool id.
-     * @param available
-     *            available capacity in bytes
+     * Set iops capacity of storage pool
+     * @param id pool id.
+     * @param capacityIops iops capacity
      */
-    void updateAvailable(long id, long available);
+    void updateCapacityIops(long id, long capacityIops);
 
     StoragePoolVO persist(StoragePoolVO pool, Map<String, String> details);
 
diff --git a/engine/api/src/org/apache/cloudstack/storage/datastore/db/PrimaryDataStoreDaoImpl.java b/engine/api/src/org/apache/cloudstack/storage/datastore/db/PrimaryDataStoreDaoImpl.java
index 96e18fc6277..2c27b0e952d 100644
--- a/engine/api/src/org/apache/cloudstack/storage/datastore/db/PrimaryDataStoreDaoImpl.java
+++ b/engine/api/src/org/apache/cloudstack/storage/datastore/db/PrimaryDataStoreDaoImpl.java
@@ -145,18 +145,17 @@ public class PrimaryDataStoreDaoImpl extends GenericDaoBase<StoragePoolVO, Long>
     }
 
     @Override
-    public void updateAvailable(long id, long available) {
+    public void updateCapacityBytes(long id, long capacityBytes) {
         StoragePoolVO pool = createForUpdate(id);
-        pool.setUsedBytes(available);
+        pool.setCapacityBytes(capacityBytes);
         update(id, pool);
     }
 
     @Override
-    public void updateCapacity(long id, long capacity) {
+    public void updateCapacityIops(long id, long capacityIops) {
         StoragePoolVO pool = createForUpdate(id);
-        pool.setCapacityBytes(capacity);
+        pool.setCapacityIops(capacityIops);
         update(id, pool);
-
     }
 
     @Override
diff --git a/server/src/com/cloud/storage/StorageManagerImpl.java b/server/src/com/cloud/storage/StorageManagerImpl.java
index 2b94df24c19..4ce134e4c58 100755
--- a/server/src/com/cloud/storage/StorageManagerImpl.java
+++ b/server/src/com/cloud/storage/StorageManagerImpl.java
@@ -791,6 +791,8 @@ public class StorageManagerImpl extends ManagerBase implements StorageManager, C
             throw new IllegalArgumentException("Unable to find storage pool with ID: " + id);
         }
 
+        Map<String, String> updatedDetails = new HashMap<String, String>();
+
         if (tags != null) {
             Map<String, String> existingDetails = _storagePoolDetailsDao.getDetails(id);
             Set<String> existingKeys = existingDetails.keySet();
@@ -825,10 +827,46 @@ public class StorageManagerImpl extends ManagerBase implements StorageManager, C
                 details.put(existingKeyToKeep, existingValueToKeep);
             }
 
-            _storagePoolDao.updateDetails(id, details);
+            updatedDetails.putAll(details);
         }
 
-        return (PrimaryDataStoreInfo) dataStoreMgr.getDataStore(pool.getId(), DataStoreRole.Primary);
+        Long updatedCapacityBytes = null;
+        Long capacityBytes = cmd.getCapacityBytes();
+
+        if (capacityBytes != null) {
+            if (capacityBytes > pool.getCapacityBytes()) {
+                updatedCapacityBytes = capacityBytes;
+            }
+            else if (capacityBytes < pool.getCapacityBytes()) {
+                throw new CloudRuntimeException("The value of 'Capacity bytes' cannot be reduced in this version.");
+            }
+        }
+
+        Long updatedCapacityIops = null;
+        Long capacityIops = cmd.getCapacityIops();
+
+        if (capacityIops != null) {
+            if (capacityIops > pool.getCapacityIops()) {
+                updatedCapacityIops = capacityIops;
+            }
+            else if (capacityIops < pool.getCapacityIops()) {
+                throw new CloudRuntimeException("The value of 'Capacity IOPS' cannot be reduced in this version.");
+            }
+        }
+
+        if (updatedDetails.size() > 0) {
+            _storagePoolDao.updateDetails(id, updatedDetails);
+        }
+
+        if (updatedCapacityBytes != null) {
+            _storagePoolDao.updateCapacityBytes(id, capacityBytes);
+        }
+
+        if (updatedCapacityIops != null) {
+            _storagePoolDao.updateCapacityIops(id, capacityIops);
+        }
+
+        return (PrimaryDataStoreInfo)dataStoreMgr.getDataStore(pool.getId(), DataStoreRole.Primary);
     }
 
     @Override