I have been trying to trouble shoot an M2 drive issue for the past couple of days.  It started shortly after updating the BIOS to 2.50.1, the OEM M2 drive stopped booting, and the drive size was not being recognized in the BIOS or windows installed USB.  I installed my operating system onto a different drive and noticed the OEM M2 was available in Windows, but not in BIOS or the windows to install.  I wanted to roll back the BIOS, but it would seem that Dell has locked out my ability to roll back my BIOS.  I tried to use their AI interface to raise my concern, but it seems impossible to enter anything useful into their prompt.  I hope I can find some support here.  Thank you. 

 

Below is the summery of me working with ChatGTP  trying to resolve this issue. 

 

• Dell Precision 5820 Tower 

• BIOS 2.50.1 (June 2026) 

• Intel VMD/VROC storage 

• SK hynix PC801 1 TB NVMe (firmware 51003141) 

Problem 
After updating to BIOS 2.50.1, the original boot NVMe SSD is no longer usable for boot or Windows installation. 

Evidence collected 

1. BIOS detects the SSD model:  

1. SK hynix PC801 NVMe 

1. Does not report the drive capacity. 

1. Windows 11 USB Setup drive:  

1. Detects the M2 drive. 

1. Reports 0 bytes capacity. 

1. Windows 11 running from a second SSD:  

1. Detects the drive correctly. 

1. Reports the full 1 TB capacity. 

1. HealthStatus = Healthy. 

1. OperationalStatus = OK. 

1. FirmwareVersion = 51003141. 

1. Drive is readable and writable. 

1. Intel VMD testing:  

1. Enabled and disabled VMD. 

1. No change. 

1. Intel VROC F6 driver:  

1. Loaded iaVROC.inf. 

1. Driver accepted. 

1. No change.