From bf90f3048f552f2dc1a0f50766646dff9f67aef9 Mon Sep 17 00:00:00 2001
From: Thomas Lange <lange@debian.org>
Date: Mon, 8 Feb 2021 17:30:58 +0100
Subject: [PATCH] tell debconf into which disks grub must be installed

All old FAI installations with MBR are affeccted by #982182
---
 scripts/GRUB_PC/10-setup | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/scripts/GRUB_PC/10-setup b/scripts/GRUB_PC/10-setup
index cbff2d84b..028f11527 100755
--- a/scripts/GRUB_PC/10-setup
+++ b/scripts/GRUB_PC/10-setup
@@ -38,15 +38,17 @@ if [[ $BOOT_DEVICE =~ '/dev/md' ]]; then
     raiddev=${BOOT_DEVICE#/dev/}
     # install grub on all members of RAID
     for device in $(LC_ALL=C perl -ne 'if(/^'$raiddev'\s.+raid\d+\s(.+)/){ $_=$1; s/\d+\[\d+\]//g; s/(nvme.+?)p/$1/g; print }' /proc/mdstat); do
-	echo Install grub on /dev/$device
-	$ROOTCMD grub-install --no-floppy "/dev/$device"
+	pdevice=$($ROOTCMD udevadm info -r --query=symlink /dev/$device | grep -Po '/dev/disk/by-id/ata\S+')
+	mbrdevices+="$pdevice, "
+	echo Installing grub on /dev/$device = $pdevice
     done
+    # remove last ,
+    mbrdevices=${mbrdevices%, }
 else
-    $ROOTCMD grub-install --no-floppy "$GROOT"
-    if [ $? -eq 0 ]; then
-        echo "Grub installed on $BOOT_DEVICE = $GROOT"
-    fi
+    mbrdevices=$($ROOTCMD udevadm info -r --query=symlink $BOOT_DEVICE | grep -Po '/dev/disk/by-id/ata\S+')
+    echo "Installing grub on $BOOT_DEVICE = $mbrdevices"
 fi
-$ROOTCMD update-grub
 
+echo "grub-pc grub-pc/install_devices multiselect $mbrdevices" | $ROOTCMD debconf-set-selections
+$ROOTCMD dpkg-reconfigure grub-pc
 exit $error