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Managing SAN Devices and I/O Multipathing in Oracle® Solaris 11.4

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Updated: November 2020
 
 

How to Configure Multiple Multipathed FC Devices

Before you configure or remove device nodes, be sure to first identify the fabric devices by using the procedures in Configuring Fabric Device Nodes.

In this example, an Ap_Id on a fabric-connected host port is a path to a multipathed device. For example, all devices with a path through c2 are to be configured, but none through c0 are to be configured. c2 is an attachment point from the system to the fabric, whereas c2::50020f2300006107 is an attachment point from the storage to the fabric. A system detects all the storage devices in a fabric for which it is configured.

Configuring an Ap_Id on the device that has already been configured through another Ap_Id results in an additional path to the previously configured device. A new device node is not created in this case. The device node is created only the first time an Ap_Id to the corresponding device is configured.

  1. Become an administrator.

    For more information, see Using Your Assigned Administrative Rights in Securing Users and Processes in Oracle Solaris 11.4.

  2. Identify the fabric-connected host port to be configured.
    # cfgadm -al
    Ap_Id                Type        Receptacle  Occupant     Condition
    c0                   fc-fabric   connected   configured   unknown
    c0::50020f2300006077 disk        connected   configured   unknown
    c0::50020f23000063a9 disk        connected   configured   unknown
    c1                   fc-private  connected   configured   unknown
    c1::220203708b69c32b disk        connected   configured   unknown
    c1::220203708ba7d832 disk        connected   configured   unknown
    c1::220203708b8d45f2 disk        connected   configured   unknown
    c1::220203708b9b20b2 disk        connected   configured   unknown
    c2                   fc-fabric   connected   unconfigured unknown
    c2::50020f2300005f24 disk        connected   unconfigured unknown
    c2::50020f2300006107 disk        connected   unconfigured unknown

    Devices represented by Ap_Ids c0::50020f2300006077 and c2::50020f2300006107 are two paths to the same physical device, with c0::50020f2300006077 already configured. Configure the unconfigured devices on the selected port. This operation repeats the configure command of an individual device for all the devices on c2. This can be time-consuming if the number of devices on c2 is large.

    # cfgadm -c configure c2
  3. Verify that all devices on c2 are configured.
    # cfgadm -al
    Ap_Id                Type       Receptacle   Occupant     Condition
    c0                   fc-fabric  connected    configured   unknown
    c0::50020f2300006077 disk       connected    configured   unknown
    c0::50020f23000063a9 disk       connected    configured   unknown
    c1                   fc-private connected    configured   unknown
    c1::220203708b69c32b disk       connected    configured   unknown
    c1::220203708ba7d832 disk       connected    configured   unknown
    c1::220203708b8d45f2 disk       connected    configured   unknown
    c1::220203708b9b20b2 disk       connected    configured   unknown
    c2                   fc-fabric  connected    configured   unknown
    c2::50020f2300005f24 disk       connected    configured   unknown
    c2::50020f2300006107 disk       connected    configured   unknown

    Notice that the Occupant column of c2 and all of the devices under c2 is marked as configured.

    The show_SCSI_LUN command displays FCP SCSI LUN information for multiple LUN SCSI devices. The following code example shows that the physical devices connected through by c2::50020f2300006107 and c2::50020f2300005f24 each have two LUNs configured.

    # cfgadm -al -o show_SCSI_LUN c2
    Ap_Id                 Type     Receptacle   Occupant     Condition
    c2                   fc-fabric connected    configured   unknown
    c2::50020f2300005f24,0 disk    connected    configured   unknown
    c2::50020f2300005f24,1 disk    connected    configured   unknown
    c2::50020f2300006107,0 disk    connected    configured   unknown
    c2::50020f2300006107,1 disk    connected    configured   unknown

Unconfiguring Fabric Devices

This section provides information about unconfiguring the multipathing features for fabric devices.