grub

GRUB (GRand Unified Bootloader) is a boot loader.

win10 + archlinux 多系统手动添加引导参考

首先查看分区

lsblk --fs

挂载win10 boot所在分区

mount /dev/sdd2 /mnt

查看 $hints_string命令

grub-probe --target=hints_string /mnt/EFI/Microsoft/Boot/bootmgfw.efi

查看 $fs_uuid命令

grub-probe --target=fs_uuid /mnt/EFI/Microsoft/Boot/bootmgfw.efi`(`lsblk --fs` 也能看到)

编辑 /boot/grub/grub.cfg

  if [ "${grub_platform}" == "efi" ]; then
  	menuentry "Microsoft Windows Vista/7/8/8.1 UEFI/GPT" {
  		insmod part_gpt
  		insmod fat
  		insmod chain
  		search --no-floppy --fs-uuid --set=root $hints_string $fs_uuid
  		chainloader /EFI/Microsoft/Boot/bootmgfw.efi
  	}
  fi

example:

### BEGIN /etc/grub.d/30_os-prober ###
if [ "${grub_platform}" == "efi" ]; then
	menuentry "Microsoft Windows Vista/7/8/8.1/10 UEFI/GPT" {
		insmod part_gpt
		insmod fat
		insmod chain
		search --no-floppy --fs-uuid --set=root --hint-bios=hd3,gpt2 --hint-efi=hd3,g pt2 --hint-baremetal=ahci3,gpt2 C018-7605
		chainloader /EFI/Microsoft/Boot/bootmgfw.efi
	}
fi
### END /etc/grub.d/30_os-prober ###

problem

小米游戏本开机变慢发现是 systemd-journal-flush.service 耗时30秒+

查看日志文件大小40M

journalctl -b -u systemd-journald

查看启动耗时

journalctl -b -u systemd-journal-flush.service