Solaris SAN Configuration and Multipathing Guide

To Configure Multiple Devices With Multipathing

Before you configure or remove device nodes, be sure to first identify the fabric devices by using the procedure Ensuring That LUN Level Information Is Visible.

In this example, an Ap_Id on a fabric-connected host port is a path to the Sun StorageTek Traffic Manager software 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 host to the fabric, whereas c2::50020f2300006107 is an attachment point from the storage to the fabric. A host 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.

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

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