DELL Latitude E7250 unattended network install failure

[donald]

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=901851

Until resolved, the unattended install will pause at

[!] Detect disks
No disk drive was detected. If you know the name of the driver needed by your disk drive, you cn select it from the list.
Driver needed for your disk drive:
[...]

From here, the operator can continue by just pressing two keys:

• ESC to breaks into the Debian Installer main menu
• RETURN to redo the current and already selected step "Detect disks"