Bootproblem1

xubuntu@xubuntu:~$ mount
/cow on / type overlayfs (rw)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
udev on /dev type devtmpfs (rw,mode=0755)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
/dev/sdd1 on /cdrom type vfat (rw,relatime,fmask=0022,dmask=0022,codepage=cp437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)
/dev/loop0 on /rofs type squashfs (ro,noatime)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev)
none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880)
none on /run/shm type tmpfs (rw,nosuid,nodev)
gvfs-fuse-daemon on /home/xubuntu/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=xubuntu)
/dev/sdb1 on /media/Datengrab type ext4 (rw,nosuid,nodev,uhelper=udisks)
/dev/sda2 on /media/1b3aa207-57a0-4384-8b98-bc478e3118da type ext2 (rw,nosuid,nodev,uhelper=udisks)
/dev/mapper/xubuntu-root on /media/85c00894-51ac-479b-8dd7-ec77ff7a9eb6 type ext4 (rw,nosuid,nodev,uhelper=udisks)