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Example: Using SAS fabric path information

This data becomes helpful in determining the cause of configuration or SAS fabric problems.

The following example assumes a cascaded disk enclosure with a broken connection on one path between the cascaded enclosures.

Example, Usage of SAS Fabric Path Information
The state of all paths to all devices displays information similar to the following.
+--------------------------------------------------------------------------------+
|                     Show SAS Controller Physical Resources                     |
|                                                                                |
|Move cursor to desired item and press Enter.                                    |
|                                                                                |
|  Show Physical Resource Locations                                              |
|  Show Physical Resource Information                                            |
|  Show Fabric Path Graphical View                                               |
|  Show Fabric Path Data View                                                    |
|  +--------------------------------------------------------------------------+  |
|  |                  Show SAS Controller Physical Resources                  |  |
|  |                                                                          |  |
|  | Move cursor to desired item and press Enter.                             |  |
|  |                                                                          |  |
|  |   pdisk0      Path 1: Operational  Path 2: Operational                   |  |
|  |   pdisk1      Path 1: Operational  Path 2: Operational                   |  |
|  |   pdisk2      Path 1: Operational  Path 2: Operational                   |  |
|  |   pdisk3      Path 1: Operational  Path 2: Operational                   |  |
|  |   pdisk4      Path 1: Operational  Path 2: Operational                   |  |
|  |   pdisk5      Path 1: Operational  Path 2: Operational                   |  |
|  |   pdisk6      Path 1: Operational  Path 2: Operational                   |  |
|  |   pdisk7      Path 1: Operational  Path 2: Operational                   |  |
|  |   pdisk8      Path 1: Operational  Path 2: Operational                   |  |
|  |   pdisk9      Path 1: Failed       Path 2: Operational                   |  |
|  |   pdisk10     Path 1: Failed       Path 2: Operational                   |  |
|  |   pdisk11     Path 1: Failed       Path 2: Operational                   |  |
|  |   pdisk12     Path 1: Failed       Path 2: Operational                   |  |
|  |   pdisk13     Path 1: Failed       Path 2: Operational                   |  |
|  |   pdisk14     Path 1: Failed       Path 2: Operational                   |  |
|  |   pdisk15     Path 1: Failed       Path 2: Operational                   |  |
|  |   pdisk16     Path 1: Failed       Path 2: Operational                   |  |
|  |   ses0        Path 1: Operational                                        |  |
|  |   ses1        Path 1: Operational                                        |  |
|  |   ses2        Path 1: Operational                                        |  |
|  |   ses3        Path 1: Operational                                        |  |
|  |   ses4        Path 1: Operational                                        |  |
|  |                                                                          |  |
|  | F1=Help                 F2=Refresh              F3=Cancel                |  |
|  | F8=Image                F10=Exit                Enter=Do                 |  |
|  | /=Find                  n=Find Next                                      |  |
|  +--------------------------------------------------------------------------+  |
 +--------------------------------------------------------------------------------+
For Show Fabric Path Data View, choosing one of the devices with a Failed path will display information similar to the following.
+--------------------------------------------------------------------------------+
|                                 COMMAND STATUS                                 |
|                                                                                |
|Command: OK            stdout: yes           stderr: no                         |
|                                                                                |
|Before command completion, additional instructions might appear below.          |
|                                                                                |
|                                                                                |
|                                                                                |
|Adapter    Adapter Port  Path Active  Path State   Device                       |
|---------  ------------  -----------  -----------  --------                     |
|sissas0    4             No           Failed       pdisk9                       |
|                                                                                |
|Node  SAS Address       Port Type     Phy   Status            Info              |
|----  ----------------  ------------  ----  ----------------  -----------       |
|1     5005076C0701CD05  Adapter       4     Operational       3.0 GBPS          |
|2     500A0B8257CC9000  Expander      16    Operational       3.0 GBPS          |
|3     0000000000000000  Expander      FF    Missing           Status 0          |
|4     5000CCA003100DF3  LUN           40    Missing           Status 0          |
|                                                                                |
|                                                                                |
|Adapter    Adapter Port  Path Active  Path State   Device                       |
|---------  ------------  -----------  -----------  --------                     |
|sissas0    6             Yes          Operational  pdisk9                       |
|                                                                                |
|Node  SAS Address       Port Type     Phy   Status            Info              |
|----  ----------------  ------------  ----  ----------------  -----------       |
|1     5005076C0701CD07  Adapter       6     Operational       3.0 GBPS          |
|2     500A0B8257CEA000  Expander      16    Operational       3.0 GBPS          |
|3     500A0B8257CEA000  Expander      10    Operational       3.0 GBPS          |
|4     500A0B81E18E7000  Expander      10    Operational       3.0 GBPS          |
|5     500A0B81E18E7000  Expander      0     Operational       3.0 GBPS          |
|6     5000CCA003900DF3  Device        1     Operational       3.0 GBPS          |
|7     5000CCA003100DF3  LUN           40    Operational       LUN_ID 000        |
+--------------------------------------------------------------------------------+
For Show Fabric Path Graphical View, choosing one of the devices with a Failed path will display information similar to the following.
+--------------------------------------------------------------------------------+
|                                  COMMAND STATUS                                |
|                                                                                |
| Command: OK            stdout: yes           stderr: no                        |
|                                                                                |
| Before command completion, additional instructions might appear below.         |
| ***********************************************************************        |
| Path(s) from sissas0 to the pdisk9.                                            |
| ***********************************************************************        |
| +---------------------------------------------------------------------+        |
| |Path Active: No               Adapter     Path Active: Yes           |        |
| |Path State : Failed           sissas0     Path State : Operational   |        |
| +---------------------------+-------------+---------------------------+        |
| |SAS Addr: 5005076C0701CD05 |             |SAS Addr: 5005076C0701CD07 |        |
| |Port    : 4                |             |Port    : 6                |        |
| |Status  : Operational      |             |Status  : Operational      |        |
| |Info    : 3.0 GBPS         |             |Info    : 3.0 GBPS         |        |
| +---------------------------+             +---------------------------+        |
|              ||                                        ||                      |
|              \/                                        \/                      |
| +---------------------------+             +---------------------------+        |
| |       Expander : 1        |             |       Expander : 1        |        |
| +---------------------------+             +---------------------------+        |
| |SAS Addr: 500A0B8257CC9000 |             |SAS Addr: 500A0B8257CEA000 |        |
| |Port    : 16               |             |Port    : 16               |        |
| |Status  : Operational      |             |Status  : Operational      |        |
| |Info    : 3.0 GBPS         |             |Info    : 3.0 GBPS         |        |
| +---------------------------+             +---------------------------+        |
| |SAS Addr: 0000000000000000 |             |SAS Addr: 500A0B8257CEA000 |        |
| |Port    : FF               |             |Port    : 10               |        |
| |Status  : Missing          |             |Status  : Operational      |        |
| |Info    : Status 0         |             |Info    : 3.0 GBPS         |        |
| +---------------------------+             +---------------------------+        |
|              ||                                        ||                      |
|              ||                                        \/                      |
|              ||                           +---------------------------+        |
|              ||                           |       Expander : 2        |        |
|              ||                           +---------------------------+        |
|              ||                           |SAS Addr: 500A0B81E18E7000 |        |
|              ||                           |Port    : 10               |        |
|              ||                           |Status  : Operational      |        |
|              ||                           |Info    : 3.0 GBPS         |        |
|              ||                           +---------------------------+        |
|              ||                           |SAS Addr: 500A0B81E18E7000 |        |
|              ||                           |Port    : 0                |        |
|              ||                           |Status  : Operational      |        |
|              ||                           |Info    : 3.0 GBPS         |        |
|              ||                           +---------------------------+        |
|              ||                                        ||                      |
|              ||                                        \/                      |
|              ||                           +---------------------------+        |
|              ||                           |          Device           |        |
|              ||                           +---------------------------+        |
|              ||                           |SAS Addr: 5000CCA003900DF3 |        |
|              ||                           |Port    : 1                |        |
|              ||                           |Status  : Operational      |        |
|              \/                           |Info    : 3.0 GBPS         |        |
| +---------------------------+-------------+---------------------------+        |
| |SAS Addr: 5000CCA003100DF3 | Device Lun  |SAS Addr: 5000CCA003100DF3 |        |
| |Status  : Missing          | pdisk9      |Status  : Operational      |        |
| |Info    : LUN_ID 000       |             |Info    : LUN_ID 000       |        |
| +---------------------------+-------------+---------------------------+        |
+--------------------------------------------------------------------------------+


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Last updated: Thu, October 10, 2013