Chapter 7 Server Administration 131
Note – Regardless of the method you use, it is often necessary to perform additional
administrative steps to prepare for a PCI hot-plug removal operation. Prior to
performing a removal operation, you must ensure that the devices residing on the
card are not currently in use. To identify and manually terminate usage of such
devices, a system administrator can use standard Solaris OS commands such as
mount(1M), umount(1M), swap(1M), ifconfig(1M), and ps(1).
For More Information
For detailed PCI hot-plug procedures, refer to the Sun Fire V890 Dynamic
Reconfiguration User’s Guide, which is available at http://docs.sun.com, under
Solaris on Sun Hardware. Refer to the Sun Fire V890 Server Product Notes for late-
breaking details.
About Multipathing Software
Multipathing software lets you define and control redundant physical paths to I/O
devices such as storage devices and networks. If the active path to a device becomes
unavailable, the software can automatically switch to an alternate path to maintain
availability. This capability is known as automatic failover. To take advantage of
multipathing capabilities, your server must be configured with redundant hardware,
such as redundant network interfaces or two FC-AL host bus adapters connected to
the same dual-ported storage array.
Multipathing software is often used in conjunction with Solaris Dynamic
Reconfiguration (DR) software (see “About Hot-Pluggable and Hot-Swappable
Components” on page 127). In response to a component failure in an active path, the
multipathing software automatically switches to an alternate path, while the DR
feature lets you remove and replace the faulty component without impacting normal
system operations.
For Sun Fire V890 systems, two different types of multipathing software are
available:
■ Solaris IP Network Multipathing provides multipathing and load-balancing
capabilities for IP network interfaces.
■ Sun StorEdge Traffic Manager. See the Sun Fire V890 Server Product Notes for
details about this software.
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