Externe Festplatte mit Linux bootet nicht immer.

kobelt@kobelt-Lenovo:~$ inxi -Fz
System:
  Kernel: 6.8.0-53-generic arch: x86_64 bits: 64
  Desktop: Cinnamon v: 6.2.9 Distro: Linux Mint 22 Wilma
Machine:
  Type: Desktop System: LENOVO product: Lenovo H420 v: Lenovo
    serial: <superuser required>
  Mobo: LENOVO model: N/A serial: <superuser required> BIOS: LENOVO
    v: DPKT23A date: 01/13/2012
CPU:
  Info: quad core model: Intel Core i5-2320 bits: 64 type: MCP cache:
    L2: 1024 KiB
  Speed (MHz): avg: 1599 min/max: 1600/3300 cores: 1: 1600 2: 1596 3: 1600
    4: 1600
Graphics:
  Device-1: NVIDIA GF119 [GeForce GT 520] driver: nouveau v: kernel
  Display: x11 server: X.Org v: 21.1.11 with: Xwayland v: 23.2.6 driver: X:
    loaded: modesetting unloaded: fbdev,vesa dri: nouveau gpu: nouveau
    resolution: 1680x1050~60Hz
  API: EGL v: 1.5 drivers: nouveau,swrast
    platforms: gbm,x11,surfaceless,device
  API: OpenGL v: 4.5 compat-v: 4.3 vendor: mesa v: 24.2.8-1ubuntu1~24.04.1
    renderer: NVD9
Audio:
  Device-1: Intel 6 Series/C200 Series Family High Definition Audio
    driver: snd_hda_intel
  Device-2: NVIDIA GF119 HDMI Audio driver: snd_hda_intel
  API: ALSA v: k6.8.0-53-generic status: kernel-api
  Server-1: PipeWire v: 1.0.5 status: active
Network:
  Device-1: Intel 82579V Gigabit Network driver: e1000e
  IF: eno1 state: up speed: 1000 Mbps duplex: full mac: <filter>
Drives:
  Local Storage: total: 1.88 TiB used: 11.35 GiB (0.6%)
  ID-1: /dev/sda vendor: Seagate model: ST31000524AS size: 931.51 GiB
  ID-2: /dev/sdc vendor: Toshiba model: MQ04ABF100 size: 931.51 GiB
    type: USB
  ID-3: /dev/sdd vendor: Generic model: ISY USB DRIVE size: 58.2 GiB
    type: USB
Partition:
  ID-1: / size: 915.82 GiB used: 11.22 GiB (1.2%) fs: ext4 dev: /dev/sdc1
Swap:
  Alert: No swap data was found.
Sensors:
  System Temperatures: cpu: 32.0 C mobo: N/A gpu: nouveau temp: 38.0 C
  Fan Speeds (rpm): N/A
Info:
  Memory: total: 4 GiB available: 3.81 GiB used: 1.51 GiB (39.6%)
  Processes: 248 Uptime: 8m Shell: Bash inxi: 3.3.34
kobelt@kobelt-Lenovo:~$ 

# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
#   info -f grub -n 'Simple configuration'

GRUB_DEFAULT=0
GRUB_TIMEOUT_STYLE=hidden
GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR=`( . /etc/os-release; echo ${NAME:-Ubuntu} ) 2>/dev/null || echo Ubuntu`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX=""

# If your computer has multiple operating systems installed, then you
# probably want to run os-prober. However, if your computer is a host
# for guest OSes installed via LVM or raw disk devices, running
# os-prober can cause damage to those guest OSes as it mounts
# filesystems to look for things.
#GRUB_DISABLE_OS_PROBER=false

# Uncomment to enable BadRAM filtering, modify to suit your needs
# This works with Linux (no patch required) and with any kernel that obtains
# the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)
#GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef"

# Uncomment to disable graphical terminal
#GRUB_TERMINAL=console

# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'
#GRUB_GFXMODE=640x480

# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux
#GRUB_DISABLE_LINUX_UUID=true

# Uncomment to disable generation of recovery mode menu entries
#GRUB_DISABLE_RECOVERY="true"

# Uncomment to get a beep at grub start
#GRUB_INIT_TUNE="480 440 1"