Dell Brocade Adapters - Manual (Page 159)

Brocade Adapters Installation and Reference Manual 131
53-1002144-01
Boot over SAN
4
NOTE
Some storage devices need the appropriate host type associated with the logical drive
configured for the correct operating system. This is necessary so that the storage device can
send the correct format of inquiry data to the host. Refer to your storage system
documentation for specific requirements.
• Configure the storage system so that the adapter port has exclusive access to the LUN.
Accomplish this by binding an adapter port PWWN to a LUN. You can easily find an adapter port
PWWN using the Brocade BIOS Configuration Utility (refer to
“Configuring BIOS using the
Brocade configuration utility” on page 136). Exclusive access to the LUN can also be assured
by using a LUN-management feature, such as LUN masking, zoning, or a combination of these.
NOTE
You should use LUN masking to avoid boot failures. To configure LUN masking using the
Brocade LUN Masking feature, refer to the Brocade Administrator’s Guide.
• Only one path to the boot LUN must be visible to the operating system during the host’s boot
process. If the storage device has multiple controller ports, only one port can be enabled or
connected to the SAN during the operating system boot process.
• Create a specific zone containing the adapter port world-wide name (PWWN) and the target
PWWN to keep RCSN interruptions from other hosts to a minimum.
• If trunking is enabled, use the PWWN of Adapter Port-0 when configuring Fabric Zones and
LUN Masking for storage.
• For Microsoft Windows and Linux environments, the SAN must be connected to the host
system in a switched fabric or point-to-point topology. Fibre Channel Arbitrated Loop (FC-AL)
connections are not supported.
Disabling N_Port trunking
The Fibre Channel N_Port Trunking feature works in conjunction with the trunking feature on
Brocade switches, whereby the Fabric Operating System (FOS) provides a mechanism to trunk
different switch ports of the same port group into one. Disabling the N_Port trunking feature on the
adapter when using boot over SAN requires specific procedures that are included in the Brocade
Adapters Administrator’s Guide. Refer to that guide for details.
Configuring boot over SAN
You must configure boot over SAN on the adapter, as well as the storage device. Use this section to
guide you through other sections in this chapter that contain complete procedures for configuring
the adapter to boot from a SAN device.
Instructions are provided in this section for configuring boot over SAN on BIOS-based systems using
the Brocade BIOS Configuration Utility, BCU commands, and HCM. You can also configure adapters
using the Legacy BIOS mode (if the system supports Legacy mode) or by using another non-UEFI
mode system.
Instructions are provided in this section for configuring boot over SAN on UEFI-based systems that
support EFI shell commands. Configuring Brocade adapters in UEFI mode may not be supported on
some host systems. However, since Brocade adapters ship with all ports enabled and
auto-negotiated speed enabled by default, adapters should work in most systems.