What can go wrong went wrong today.
I tried to flash 2 Pixel 6a.
But now both are stuck in fast mode mode.
Probably because of bad USB connection and / or wrong driver in boot mode.
adb had worked:
adb reboot bootloader
device started in boot loader mode,
FAILED (status read failed (Too many links))
Now both devices are in fastboot mode
and the only thing that works is the barcode display, nothing else, no restart …
And the devices are no longer recognized even under Windows I connect it.