Use the vSphere Client to determine which SATP and PSP the ESX host uses for a specific storage device and the status of all available paths for this storage device. You can access the path information from both, the Datastores and Devices views. For datastores, you review the paths that connect to the device the datastore is deployed on.

The path information includes the SATP assigned to manage the device, the path selection policy (PSP), and a list of paths with their physical characteristics, such as an adapter and target each path uses, and the status of each path. The following path status information can appear:

Active

Paths available for issuing I/O to a LUN. A single or multiple working paths currently used for transferring data are marked as Active (I/O).

Note

For hosts that run ESX 3.5 or earlier, the term active means the only path that the host is using to issue I/O to a LUN.

Standby

The path is operational and can be used for I/O if active paths fail.

Disabled

The path is disabled and no data can be transferred.

Dead

The software cannot connect to the disk through this path.

If you are using the Fixed path policy, you can see which path is the preferred path. The preferred path is marked with an asterisk (*) in the Preferred column.