Here’s a quick way to chroot another boot disk. Attach the rescued boot disk first. Run lsblk and mount.

<pre lang="bash">lsblk
mount -t xfs -o nouuid /dev/xvdf2 /mnt
mount --bind /proc /mnt/proc
mount --bind /sys /mnt/sys
mount --bind /dev /mnt/dev
chroot /mnt
cd /mnt
exit

Unmount when done.

<pre lang="bash">umount /mnt/proc
umount /mnt/dev
umount /mnt/sys
umount /mnt