I've had this laptop (Lenovo Thinkpad T430) for a while with no issues. Randomly tonight I was given this error. I've taken out and put the SSD back in but no fix
How to Fix Lenovo Error 'Detection Error on HDD0 (Main HDD)' - Appuals.com
2100: Detection Error on HDD0 | Laptop Hard Disk not found | Info 10 - YouTube
Fix SSD error 2100 with these solutions
Thinkpad 2100 HDD detection error : r/computers
Lenovo ThinkPad T420 Not Booting | 2100 Detection Error On HDD0 - YouTube