By reviewing a specific example of degraded system health caused by a shelf that lacks two paths to a node, you can see what the CLI displays when you respond to an alert.
system>system health status show
Status
---------------
degraded
system>system health alert show
Node: node1
Resource: Shelf ID 2
Severity: Major
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.
system>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
system>system health alert modify -node node1 -alert-id DualPathToDiskShelf_Alert -acknowledge true
system>system health status show
Status
---------------
OK