67 lines
1.5 KiB
Plaintext
67 lines
1.5 KiB
Plaintext
# --------------------
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# RAID 1 of /boot/efi partition on Debian
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# --------------------
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# see: https://unix.stackexchange.com/questions/644108/raid-1-of-boot-efi-partition-on-debian
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The steps are mainly:
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1.) Install Debian without setting up the RAID for the ESP partition.
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During the partitioning, I've already created two identical partitions
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marked as ESP partitions. They were on /dev/sda1 and /dev/sdb1
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2.) Copie the contents of /boot/efi somewhere else (/boot/eficopy).
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3.) umount /boot/efi
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4.) Create an array for use as EFI partion.
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NOTE:
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use metadata version 1.0
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Version 1.0 still has the requirement (for this usecase) of placing the
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superblock at the end of the device, but also includes "the modern features of mdadm",
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by using common layout format as 1.1 & 1.2.
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# mdadm --create --verbose /dev/md3 --level=1 --raid-devices=2 --metadata=1.0 /dev/sda1 /dev/sdb1
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5.) mkfs.vfat /dev/md3
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6.) found the UUID of the partition in /dev/disk/by-uuid:
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# ls -al /dev/disk/by-uuid/
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7.) Changed the /boot/efi entry in /etc/fstab with the new UUID
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for example:
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UUID=C354-2922 /boot/efi vfat umask=0077 0 1
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8.) systemctl daemon-reload
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9.) mount /boot/efi
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10.) Copy the data from the backup into /boot/efi again
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11) mdadm: Scan config file or /proc/mdstat for missing information:
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# mdadm --examine --scan
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add row for new array to file /etc/mdadm/mdadm.conf
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12.) Update initramfs:
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# update-initramfs -u -k all
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