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====== Installing Windows Server 2008 to an iSCSI target ===== To install Windows Server 2008 to an iSCSI target, you must first configure your system to attempt to boot via iSCSI, and fall back to booting from DVD-ROM if the iSCSI boot fails. The exact procedure for doing this will vary depending on your computer's BIOS. ===== Configuring the BIOS boot order ===== Enter your BIOS setup screen. (Typically, this will require you to press a key such as DEL or one of the function keys F1-F12 immediately after rebooting the system.) Configure your BIOS to attempt booting in the following order: - Boot using gPXE. - Boot from DVD-ROM. ===== Configuring gPXE for iSCSI boot ===== Place the following lines in ///etc/dhcpd.conf//: option space gpxe; option gpxe-encap-opts code 175 = encapsulate gpxe; option gpxe.keep-san code 8 = unsigned integer 8; filename ""; option root-path ""; option gpxe.keep-san 1; where // is the DNS name (or IP address) of your iSCSI target, and // is the iSCSI target IQN that you wish to boot from. You will probably need to restart your DHCP server for the changes to take effect: root@chipmunk# /etc/init.d/dhcpd restart ===== Starting the installation ===== Place the Windows Server 2008 DVD-ROM in the drive, and switch on the computer. You should see it attempt to boot via iSCSI, fail, and then boot from the DVD-ROM. Once you reach the point of selecting an installation disk drive, you should see your iSCSI disk appear in the list: **Note:** If you get the message "//This computer's hardware may not support booting to this disk. Ensure that the disk's controller is enabled in the computer's BIOS menu.//" or "//Windows is unable to find a system volume that meets its criteria for installation.//", do the following: Create a new partition on the disk and format it. Then exit the setup and try again after a reboot. More information can be found in [[|this article.]] {{ :screenshots:win2k8_iscsi_install.png?800x600 |Windows Server 2008 installation disk selection}} ===== Completing the installation ===== Continue the installation as normal. Your computer will reboot a few times during installation; you can safely leave it unattended during this time. Congratulations on successfully installing Windows Server 2008 to an iSCSI target! {{ :screenshots:win2k8_iscsi_boot.png?800x600 |Windows Server 2008 booted from an iSCSI target}} ==== What to do if the installation can't find the iSCSI disk. ==== - Ensure the iSCSI target is working by connecting it with existing os. To make your life easy, You can unset the password for the iSCSI target for testing. - Reboot the into gPXE, then press <code>Ctrl-B</code> to get the command line. - In the command line, type <code>dhcp net0</code> You'll see response which is like: <code>DHCP (net0 xx:xx:xx:xx:xx:xx)... ok</code> - In the command line, type <code>set keep-san 1</code> - And in command line, type <code>sanboot</code> If you see something like "Preserving connection to SAN disk." in response, You are on the half way. - In the command line, type <code>exit</code> - Go on with the installation above. **NOTE:** If you are installing vista, be sure to read the NOTE in [[sanboot:winvista|Vista install guide]] to save your time.

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