IBM N Series, Hardware Manual

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Chapter 18. Boot from SAN
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4. Load the boot sector: The first sector of the boot device, which contains the MBR (Master
Boot Record), is loaded. The MBR contains the address of the bootable partition on the
disk where the operating system is located.
18.2.4 Configuring SAN booting before installing Windows or Linux systems
To use a LUN as a boot device, complete the following steps:
1. Obtain the WWPN of the initiator HBA that is installed on the host. The WWPN is required
to configure the initiator group on the storage system. Map the LUN to it.
2. Enable and configure BootBIOS on the HBA to use the LUN as a boot device.
3. Configure the PC BIOS boot order to make the LUN the first disk device.
For more information about SAN booting, including restrictions and configuration
recommendations, see Support for FCP/iSCSI Host Utilities on Windows at this website:
https://www-304.ibm.com/systems/support/myview/supportsite.wss/selectproduct?taski
nd=7&brandind=5000029&familyind=5364556&typeind=0&modelind=0&osind=0&psid=sr&conti
nue.x=1
For more information about Linux Support for FCP/iSCSI Host Utilities, see this website:
http://www-304.ibm.com/systems/support/myview/supportsite.wss/selectproduct?taskin
d=7&brandind=5000029&familyind=5364552&typeind=0&modelind=0&osind=0&psid=sr&contin
ue.x=1
Obtaining the WWPN of the initiator HBA
Before you create the LUN on the storage system and map it to an igroup, obtain the WWPN
of the HBA that is installed on the host. The WWPN is required when you create the igroup.
You can obtain the WWPN by using one of the following tools:
򐂰 Emulex BIOS Utility
򐂰 QLogic Fast!UTIL
Obtaining the WWPN by using Emulex BIOS Utility
To obtain the WWPN by using the Emulex BIOS Utility, complete the following steps:
1. Reboot the host.
2. Press Alt+E to access the Emulex BIOS Utility.
Prerequisites: After you obtain the WWPN for the HBA, create the LUN to use as a
boot device. Map this LUN to an initiator group, and assign it a LUN ID of 0.