Users Guide

6–Boot from SAN Configuration
iSCSI Boot from SAN
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6. Edit the /etc/default/grub file and modify the GRUB_CMDLINE_LINUX
value:
a. Remove
rd.iscsi.ibft (if present).
b. Remove any
ip=<value> boot options (if present).
c. Add
rd.iscsi.firmware. For older distros, add iscsi_firmware.
7. Create a backup of the original
grub.cfg file. The file is in the following
locations:
 Legacy boot:
/boot/grub2/grub.cfg
 UEFI boot: /boot/efi/EFI/sles/grub.cfg for SLES
8. Create a new
grub.cfg file by issuing the following command:
# grub2-mkconfig -o <new file name>
9. Compare the old grub.cfg file with the new grub.cfg file to verify your
changes.
10. Replace the original
grub.cfg file with the new grub.cfg file.
11. Build the
initramfs file by issuing the following command:
# dracut -f
12. Reboot the server, and then open the UEFI HII.
13. In the UEFI HII, disable iSCSI boot from BIOS, and then enable iSCSI HBA
or boot for the adapter as follows:
a. Select the adapter port, and then select Device Level Configuration.
b. On the Device Level Configuration page, for the Virtualization Mode,
select NPAR.
c. Open the NIC Partitioning Configuration page and set the iSCSI
Offload Mode to Enabled. (iSCSI HBA support is on partition 3 for a
two--port adapter and on partition 2 for a four-port adapter.)
d. Open the NIC Configuration menu and set the Boot Protocol to
UEFI iSCSI.
e. Open the iSCSI Configuration page and configure iSCSI settings.
14. Save the configuration and reboot the server.
The OS can now boot through the offload interface.