ядро не обновляется что делать? {SOLVED}

Ну значит переустанавливай при смонтированному /boot и заодно наполни его файлами загрузчика, если их там нет. Ну и конфиг посмотри на предмет того какую файловую систему загрузчик использует в качестве своего корня.

grub

#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub2-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
  load_env
fi
if [ "${next_entry}" ] ; then
   set default="${next_entry}"
   set next_entry=
   save_env next_entry
   set boot_once=true
else
   set default="0"
fi

if [ x"${feature_menuentry_id}" = xy ]; then
  menuentry_id_option="--id"
else
  menuentry_id_option=""
fi

export menuentry_id_option

if [ "${prev_saved_entry}" ]; then
  set saved_entry="${prev_saved_entry}"
  save_env saved_entry
  set prev_saved_entry=
  save_env prev_saved_entry
  set boot_once=true
fi

function savedefault {
  if [ -z "${boot_once}" ]; then
    saved_entry="${chosen}"
    save_env saved_entry
  fi
}

function load_video {
  if [ x$feature_all_video_module = xy ]; then
    insmod all_video
  else
    insmod efi_gop
    insmod efi_uga
    insmod ieee1275_fb
    insmod vbe
    insmod vga
    insmod video_bochs
    insmod video_cirrus
  fi
}

if [ x$feature_default_font_path = xy ] ; then
   font=unicode
else
insmod part_msdos msdos 
insmod diskfilter mdraid09 
insmod ext2
set root='mduuid/a9b82293193a3830cb201669f728008a'
if [ x$feature_platform_search_hint = xy ]; then
  search --no-floppy --fs-uuid --set=root --hint='mduuid/a9b82293193a3830cb201669f728008a'  9ac7d56a-ce8e-4370-8b0d-93ed2949be03
else
  search --no-floppy --fs-uuid --set=root 9ac7d56a-ce8e-4370-8b0d-93ed2949be03
fi
    font="/usr/share/grub/unicode.pf2"
fi

if loadfont $font ; then
  set gfxmode=auto
  load_video
  insmod gfxterm
fi
terminal_output gfxterm
if [ x$feature_timeout_style = xy ] ; then
  set timeout_style=menu
  set timeout=5
# Fallback normal timeout code in case the timeout_style feature is
# unavailable.
else
  set timeout=5
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/10_linux ###
menuentry 'Gentoo GNU/Linux' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-9ac7d56a-ce8e-4370-8b0d-93ed2949be03' {
	load_video
	insmod gzio
	insmod part_msdos msdos 
	insmod diskfilter mdraid09 
	insmod ext2
	set root='mduuid/16d914c9da382eefcb201669f728008a'
	if [ x$feature_platform_search_hint = xy ]; then
	  search --no-floppy --fs-uuid --set=root --hint='mduuid/16d914c9da382eefcb201669f728008a'  d677df40-3e31-4f5c-929d-5af1106e5b2c
	else
	  search --no-floppy --fs-uuid --set=root d677df40-3e31-4f5c-929d-5af1106e5b2c
	fi
	echo	'Loading Linux 3.12.13-gentoo ...'
	linux	/vmlinuz-3.12.13-gentoo root=/dev/md2 ro  
}
submenu 'Advanced options for Gentoo GNU/Linux' $menuentry_id_option 'gnulinux-advanced-9ac7d56a-ce8e-4370-8b0d-93ed2949be03' {
	menuentry 'Gentoo GNU/Linux, with Linux 3.12.13-gentoo' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.12.13-gentoo-advanced-9ac7d56a-ce8e-4370-8b0d-93ed2949be03' {
		load_video
		insmod gzio
		insmod part_msdos msdos 
		insmod diskfilter mdraid09 
		insmod ext2
		set root='mduuid/16d914c9da382eefcb201669f728008a'
		if [ x$feature_platform_search_hint = xy ]; then
		  search --no-floppy --fs-uuid --set=root --hint='mduuid/16d914c9da382eefcb201669f728008a'  d677df40-3e31-4f5c-929d-5af1106e5b2c
		else
		  search --no-floppy --fs-uuid --set=root d677df40-3e31-4f5c-929d-5af1106e5b2c
		fi
		echo	'Loading Linux 3.12.13-gentoo ...'
		linux	/vmlinuz-3.12.13-gentoo root=/dev/md2 ro  
	}
	menuentry 'Gentoo GNU/Linux, with Linux 3.12.13-gentoo (recovery mode)' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.12.13-gentoo-recovery-9ac7d56a-ce8e-4370-8b0d-93ed2949be03' {
		load_video
		insmod gzio
		insmod part_msdos msdos 
		insmod diskfilter mdraid09 
		insmod ext2
		set root='mduuid/16d914c9da382eefcb201669f728008a'
		if [ x$feature_platform_search_hint = xy ]; then
		  search --no-floppy --fs-uuid --set=root --hint='mduuid/16d914c9da382eefcb201669f728008a'  d677df40-3e31-4f5c-929d-5af1106e5b2c
		else
		  search --no-floppy --fs-uuid --set=root d677df40-3e31-4f5c-929d-5af1106e5b2c
		fi
		echo	'Loading Linux 3.12.13-gentoo ...'
		linux	/vmlinuz-3.12.13-gentoo root=/dev/md2 ro single 
	}
	menuentry 'Gentoo GNU/Linux, with Linux 3.12.13-gentoo.old' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.12.13-gentoo.old-advanced-9ac7d56a-ce8e-4370-8b0d-93ed2949be03' {
		load_video
		insmod gzio
		insmod part_msdos msdos 
		insmod diskfilter mdraid09 
		insmod ext2
		set root='mduuid/16d914c9da382eefcb201669f728008a'
		if [ x$feature_platform_search_hint = xy ]; then
		  search --no-floppy --fs-uuid --set=root --hint='mduuid/16d914c9da382eefcb201669f728008a'  d677df40-3e31-4f5c-929d-5af1106e5b2c
		else
		  search --no-floppy --fs-uuid --set=root d677df40-3e31-4f5c-929d-5af1106e5b2c
		fi
		echo	'Loading Linux 3.12.13-gentoo.old ...'
		linux	/vmlinuz-3.12.13-gentoo.old root=/dev/md2 ro  
	}
	menuentry 'Gentoo GNU/Linux, with Linux 3.12.13-gentoo.old (recovery mode)' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.12.13-gentoo.old-recovery-9ac7d56a-ce8e-4370-8b0d-93ed2949be03' {
		load_video
		insmod gzio
		insmod part_msdos msdos 
		insmod diskfilter mdraid09 
		insmod ext2
		set root='mduuid/16d914c9da382eefcb201669f728008a'
		if [ x$feature_platform_search_hint = xy ]; then
		  search --no-floppy --fs-uuid --set=root --hint='mduuid/16d914c9da382eefcb201669f728008a'  d677df40-3e31-4f5c-929d-5af1106e5b2c
		else
		  search --no-floppy --fs-uuid --set=root d677df40-3e31-4f5c-929d-5af1106e5b2c
		fi
		echo	'Loading Linux 3.12.13-gentoo.old ...'
		linux	/vmlinuz-3.12.13-gentoo.old root=/dev/md2 ro single 
	}
}

### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###

### BEGIN /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###

### BEGIN /etc/grub.d/41_custom ###
if [ -f  ${config_directory}/custom.cfg ]; then
  source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f  $prefix/custom.cfg ]; then
  source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###

blkid

/dev/sda1: UUID="16d914c9-da38-2eef-cb20-1669f728008a" TYPE="linux_raid_member" 
/dev/sda2: UUID="a9b82293-193a-3830-cb20-1669f728008a" TYPE="linux_raid_member" 
/dev/sdb1: UUID="16d914c9-da38-2eef-cb20-1669f728008a" TYPE="linux_raid_member" 
/dev/sdb2: UUID="a9b82293-193a-3830-cb20-1669f728008a" TYPE="linux_raid_member" 
/dev/md2: UUID="9ac7d56a-ce8e-4370-8b0d-93ed2949be03" TYPE="ext4" 
/dev/md1: UUID="d677df40-3e31-4f5c-929d-5af1106e5b2c" TYPE="ext3"