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UEFI
UEFI multi disc
How to handle redundant boot from multiple discs ?
Added 2 more EFI partitions (3 discs setup):
# Change partition 1 type to EFI on each disc: sgdisk -t 1:EF00 -c1:efi $DISK mkfs.fat -F 32 $DISK-PART blkid $DISK-PART mkdir /boot/efi0 mkdir /boot/efi1
Add new partitions to fstab:
- /etc/fstab
UUID=xxxx-xxxx /boot/efi vfat umask=0077,nofail,noauto 0 1 UUID=D12D-CBBD /boot/efi0 vfat umask=0077,nofail,noauto 0 1 UUID=D150-1EE7 /boot/efi1 vfat umask=0077,nofail,noauto 0 1
- grub_update.sh
#!/bin/bash -eu DEVICES=( \ "/dev/disk/by-id/nvme-Samsung_SSD_970_EVO_Plus_500GB_Sxxxxxxxxxxxxxx,efi1" \ "/dev/disk/by-id/nvme-Samsung_SSD_970_EVO_Plus_500GB_Sxxxxxxxxxxxxxx,efi0" \ "/dev/disk/by-id/nvme-ADATA_LEGEND_710_xxxxxxxxxxxx,efi" \ ) for DEVLINE in "${DEVICES[@]}"; do read -r DEV BOOTDIR <<< "$(echo "${DEVLINE}" | tr ',' ' ')" grub-install --target=x86_64-efi --efi-directory=/boot/"${BOOTDIR}" "${DEV}" done
According to RAID for the EFI System Partition:
- /etc/grub.d/90_copy_to_boot_efi2
#!/bin/bash # https://wiki.debian.org/UEFI#RAID_for_the_EFI_System_Partition set -e # $1 - dest efi mount point copy_efi_to() { if mountpoint --quiet --nofollow /boot/efi; then mount "$1" || : rsync --times --recursive --delete /boot/efi/ "$1"/ # Being FAT it is even better when not mounted, won't be damaged in case of computer crash or power outage. # Ref: https://forums.debian.net/viewtopic.php?p=759692&sid=ff62e9207a064b027f041d2cd0a612a4#p759692 umount "$1" fi } copy_efi_to /boot/efi0 copy_efi_to /boot/efi1 exit 0