51 lines
1.6 KiB
Bash
51 lines
1.6 KiB
Bash
#!/bin/bash
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# Identify the currently mounted EFI partition and its device
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SOURCE_MOUNT="/boot/efi"
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SOURCE_PART=$(findmnt -no SOURCE "$SOURCE_MOUNT")
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SOURCE_UUID=$(findmnt -no UUID "$SOURCE_MOUNT")
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SOURCE_DISK=$(lsblk -no PKNAME "$SOURCE_PART")
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SOURCE_DISK_PATH="/dev/$SOURCE_DISK"
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# Extract the backup UUID from fstab
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BACKUP_UUID=$(grep "^#UUID=" /etc/fstab | grep "/boot/efi" | awk -F'[= ]' '{print $2}')
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if [ -z "$BACKUP_UUID" ]; then
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echo "Error: Backup EFI UUID not found in /etc/fstab"
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exit 1
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fi
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if [ "$SOURCE_UUID" == "$BACKUP_UUID" ]; then
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echo "Error: Source and Backup UUIDs are identical. Check /etc/fstab."
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exit 1
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fi
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# Identify the physical disk for the backup UUID
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BACKUP_PART=$(blkid -U "$BACKUP_UUID")
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BACKUP_DISK=$(lsblk -no PKNAME "$BACKUP_PART")
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BACKUP_DISK_PATH="/dev/$BACKUP_DISK"
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# Define temporary mount point
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TARGET_MOUNT=$(mktemp -d -t efi-sync.XXXXXXXXXX)
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# Trap to ensure the directory is removed even if the script fails
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trap 'rm -rf "$TARGET_MOUNT"' EXIT
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# Mount, Sync, and Cleanup
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if mount -U "$BACKUP_UUID" "$TARGET_MOUNT"; then
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echo "Syncing EFI files: $SOURCE_UUID -> $BACKUP_UUID"
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rsync -aqAX --delete "$SOURCE_MOUNT/" "$TARGET_MOUNT/"
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umount "$TARGET_MOUNT"
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echo "EFI Files Sync Complete."
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else
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echo "Error: Could not mount backup EFI ($BACKUP_UUID)"
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exit 1
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fi
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# Ensure GRUB binary is installed on BOTH physical disks
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echo "Updating GRUB bootloader on both physical disks..."
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grub-install "$SOURCE_DISK_PATH" --recheck > /dev/null 2>&1
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grub-install "$BACKUP_DISK_PATH" --recheck > /dev/null 2>&1
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echo "Redundancy Complete: Files synced and GRUB updated on $SOURCE_DISK_PATH and $BACKUP_DISK_PATH."
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