Qlogic QConvergeConsole CLI 8100 Series, User Manual

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8–Configuring FCoE in a Linux Environment
Boot-from-SAN
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Because the boot device resides on the SAN, it simplifies server management.
Separating the boot image from each server allows administrators to leverage the
advanced capabilities of storage arrays to achieve high availability, improved data
integrity, rapid provisioning, and more efficient storage management. Replacing a
failed server is as easy as moving the Converged Network Adapter to a new
server, pointing it to the SAN boot device, and booting up the new host.
All QLogic 8100 Series Converged Network Adapters allow a host to
boot-from-SAN for any of the supported versions of RHEL 5.
Boot-from-SAN requires the configuration of the QLogic 8100 Series Adapter, the
FCoE switch, and the storage array. How you connect these SAN components is
determined by the level of redundancy you require. There are minor differences
when configuring the QLogic 8100 Series Adapter for boot-from-SAN between
servers that support BIOS and those that support UEFI. The following
summarizes the configuration process:
1. Set the boot order to disable boot-from-local-disk, or disconnect the internal
hard drives.
2. Configure a single-path to the storage array when installing RHEL 5. For
multiple adapter port configurations (for redundancy), connect only one
adapter port to the SAN during installation. The same guidance applies to
the storage controller ports.
3. Enable the adapter port BIOS.
4. Specify a boot LUN using the QLogic CNA Fast! UTIL BIOS configuration
utility.
5. Boot from the optical drive. Install media/PXE boot, and proceed to install
the operating system.
6. During the operating system installation process, select the boot LUN as the
device on which to install the operating system.
7. Enable multipath (MPIO) configuration on the server after installing the
operating system.
Boot-from-SAN Requirements
The following subsections describe requirements for the host/server, Converged
Network Adapter, FCoE switch, and storage array.
Host/Server Requirements
Server requirements depend on the type of server, the SAN installation, and the
network environment. Consider the following recommendations:
 If you plan to configure boot-from-SAN on production servers, back up all
disks before proceeding.