Table of ContentsView in Frames

Checking the number of paths (7-Mode in 8.x)

For systems running 7-Mode in Data ONTAP 8.x, you use the storage array show-config command to list the array LUNs that the storage system can access, and to check that each array LUN is visible through both paths.

Steps

  1. Enter the following command to show the array LUNs in your configuration: storage array show-config
    Example
    The following output shows correctly configured array LUNs. Each LUN group contains two paths.
    LUN Group        Array Name   Array Target Ports        Switch Port    Initiator
    Group 0 (4 LUNS) HP_HSV210_1  50:00:1f:e1:50:0a:86:6d  vnmc4300s35:11    0b
                                  50:00:1f:e1:50:0a:86:69  vnbr4100s31:15    0c
    Group 1 (4 LUNS) HP_HSV210_1  50:00:1f:e1:50:0a:86:68  vnbr4100s31:1     0a
                                  50:00:1f:e1:50:0a:86:6c  vnmc4300s35:6     0d
    Group 2(50 LUNS) HP_HSV200_1  50:00:1f:e1:50:0d:14:6d  vnbr4100s31:5     0a
                                  50:00:1f:e1:50:0d:14:68  vnmc4300s35:3     0d
    Example
    The storage array show-config output shows array LUNs that are not configured with two paths as LUNs with a single path. In the following example output, the incorrectly configured LUNs are the 20 LUNs not belonging to a group and showing only a single path.
    LUN Group          Array Name     Array Target Ports        Switch Port  Initiator
    Group 2 (50 LUNS)   HP_HSV200_1  50:00:1f:e1:50:0d:14:68   vnmc4300s35:3   0d
                                     50:00:1f:e1:50:0d:14:6d   vnbr4100s31:5   0a
            (20 LUNs)   HP_HSV200_1  50:00:1f:e1:50:0d:14:69   vnmc4300s35:2   0e
  2. If you see array LUNs in the output from storage array show-config with only one path, enter the following command to show information about each array LUN on the storage array: storage array show-luns
    Example

    The following shows output from storage array show-luns:

    Name                     WWPNs
    vnmc4300s35:3.127L1 50:00:1f:e1:50:0d:14:68, 50:00:1f:e1:50:0d:14:6d
    vnmc4300s35:3.127L2 50:00:1f:e1:50:0d:14:68, 50:00:1f:e1:50:0d:14:6d
    vnmc4300s35:3.127L3 50:00:1f:e1:50:0d:14:68, 50:00:1f:e1:50:0d:14:6d
    .
    .
    .
    vnbr4100s31:5.126L49 50:00:1f:e1:50:0d:14:6d, 50:00:1f:e1:50:0d:14:68
    vnmc4300s35:3.127L50 50:00:1f:e1:50:0d:14:68, 50:00:1f:e1:50:0d:14:6d
    vnmc4300s35:3.127L51 50:00:1f:e1:50:0d:14:69,
    vnmc4300s35:3.127L52 50:00:1f:e1:50:0d:14:69,
    .
    .
    .
    vnbr4100s31:5.126L53 50:00:1f:e1:50:0d:14:69,
    vnbr4100s31:5.126L70 50:00:1f:e1:50:0d:14:69,

    LUNs 1 through 50 make up Group 2, the array LUNs configured with two ports as shown with the storage array show-config command. LUNs 51 through 70 are the 20 LUNs that contain a single path connected only to Port 50:00:1f:e1:50:0d:14:69 of the storage array.

    A single path indicates a configuration problem. The second path can have a problem at the FC initiator port on the Data ONTAP system, the switch, or the storage array port.