Computer configuration: E490 500G mechanical hard drive, add their own M.2 NVMe SSDs.
Problem: When You Start 2101: Detection error on SSD1 (M.2), does not recognize the mechanical hard drive
(Re-pluggable hard line several times invalid)
Treatment: into the BIOS, press F9 to restore the default state.
Cause: BIOS may be set to a single hard disk, plus unrecognized after a solid state.
--------------------------------------------------------------------------------------------------------------------
The following is the reference:
Recently bought a fast SSD disk, installed after a notebook, on a SSD hard drive installed Windows10 operating system, reboot appears "2101: Detection error on SSD1 ( M.2)" error, and can not enter the system, online search to no avail, and many people say is the SSD quality problems, need to be replaced. Carefully think it should not be, because the first installation of the system is to identify to the SSD drive, then I made several experiments, including again to reinstall your operating system.
The last solution is as follows : The mechanical notebook hard drive removed, install Windows10 operating system can be in the case of only one SSD drive.
Analysis: probably because the rear mounted SSD hard disk is Disk1, original notebook hard drive automatically recognized as Disk0, Windows10 will automatically draw in the space of about 500MB when installed to the system, this time in the Windows10 installation, the system will automatically 500MB of space based on Disk1 (ie the initial hard drive notebook), and unplug the initial notebook hard drive, Windows10 can only be built on a 500MB SSD