降级系统运行状况响应示例

通过查看存储架节点缺少两个路径时的降级系统运行状况具体示例，可以在响应警报时看到 CLI 的显示情况

启动 ONTAP 后，检查系统运行状况就会发现系统已处于降级状态：

<span className="ph">cluster1::</span>>system health status show
        Status
        ---------------
        degraded

显示警报以找出问题，并且可以看到存储架 2 到节点 1 没有两条路径：

<span className="ph">cluster1::</span>>system health alert show
               Node: node1
           Resource: Shelf ID 2
           Severity: Major
   Indication Time: Mon Nov 10 16:48:12 2013
     Probable Cause: Disk shelf 2 does not have two paths to controller
                     node1.
    Possible Effect: Access to disk shelf 2 via controller node1 will be
                     lost with a single hardware component failure (e.g.
                     cable, HBA, or IOM failure).
 Corrective Actions: 1. Halt controller node1 and all controllers attached to disk shelf 2.
                     2. Connect disk shelf 2 to controller node1 via two paths following the rules in the Universal SAS                        and ACP Cabling Guide.
                     3. Reboot the halted controllers.
                     4. Contact support personnel if the alert persists.

显示此警报的详细情况以获取更多信息，包括警报标识：

<span className="ph">cluster1::</span>>system health alert show -monitor node-connect -alert-id DualPathToDiskShelf_Alert -instance
                  Node: node1
               Monitor: node-connect
              Alert ID: DualPathToDiskShelf_Alert
     Alerting Resource: 50:05:0c:c1:02:00:0f:02
             Subsystem: SAS-connect
       Indication Time: Mon Mar 21 10:26:38 2011
    Perceived Severity: Major
        Probable Cause: Connection_establishment_error
           Description: Disk shelf 2 does not have two paths to controller node1.
    Corrective Actions: 1. Halt controller node1 and all controllers attached to disk shelf 2.
                        2. Connect disk shelf 2 to controller node1 via two paths following the rules in the Universal SAS                           and ACP Cabling Guide.
                        3. Reboot the halted controllers.
                        4. Contact support personnel if the alert persists.
       Possible Effect: Access to disk shelf 2 via controller node1 will be lost with a single
 hardware component failure (e.g. cable, HBA, or IOM failure).
           Acknowledge: false
              Suppress: false
                Policy: DualPathToDiskShelf_Policy
          Acknowledger: -
            Suppressor: -                                                      
Additional Information: Shelf uuid: 50:05:0c:c1:02:00:0f:02
                        Shelf id: 2
                        Shelf Name: 4d.shelf2
                        Number of Paths: 1
                        Number of Disks: 6
                        Adapter connected to IOMA:
                        Adapter connected to IOMB: 4d
Alerting Resource Name: Shelf ID 2

确认表明正在着手解决的警报。

<span className="ph">cluster1::</span>>system health alert modify -node node1 -alert-id DualPathToDiskShelf_Alert -acknowledge true

修复存储架 2 和节点 1 之间的布线，并随后重新启动系统。接着再次检查系统运行状况，此时可以看到运行状态变为 OK：

<span className="ph">cluster1::</span>>system health status show
        Status
        ---------------
        OK

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