Perform the following steps on ncn-m001.
(ncn-m001#) Run the script to ensure the local BOOTRAID has a valid kernel, initrd, and grub.cfg.
pdsh -b -w $(grep -oP 'ncn-\w\d+' /etc/hosts | sort -u | tr -t '\n' ',') '
/opt/cray/tests/install/ncn/scripts/check_bootloader.sh
'
If the script fails because of ‘Host key verification’ failures, then follow the documentation to Apply root SSH keys to NCNs.
If executing this procedure as part of an NCN rebuild, return to the main Rebuild NCNs page and proceed with the next step.