Cisco C880 M5 Installation Manual page 64

Setting procedure
1. Stop the system.
2. In iRMC Web-UI, select Memory Operation to change to Address Range
Mirror Mode in [Settings] -> [Server Management] -> [Memory Operation Mode]
window.
3. Start the system.
4. Execute following command on the OS.
# efibootmgr -m t -M <Percentage of mirror size>
For percentage of mirror size, see
page 63.
5. Reboot the system.
# systemctl reboot
6. Confirm following message is output in /var/log/message.
efi: Memory: XXXM/YYYM mirrored memory
The number is displayed in XXX and YYY.
7. Modify /etc/default/grub as follows;
Add "kernelcore=mirror numa_zonelist_order=zone" in the line of
GRUB_CMDLINE_LINUX
8. Execute following command.
- For Red Hat Enterprise Linux
# grub2-mkconfig -o /boot/efi/EFI/redhat/grub.cfg
- For SUSE Linux Enterprise Server
# grub2-mkconfig -o /boot/grub2/grub.cfg
9. Reboot the system.
# systemctl reboot
Note
 If you use Address Range Mirror mode, you must boot OS with UEFI. If you
boot OS with Legacy, OS does not aware Address Range Mirror mode.
 There is no setting about Memory Mirror RAS for Address Range Mirror
mode.
64
"Maximum and Minimum Mirror Size" on
Cisco C880 M5 Installation Manual