Device is not enumerating while issuing powercycle through devcon64.exe command

Question

On my Window I have SSD connected in one of the PCIe slots. So, while testing the SSD

I'm using the devcon application to power cycle my SSD. After running the devcon App my SSD is not enumerating when issuing powercycle through

**devcon64.exe restart "@deviceID"**cmd.

In Gen3 (PCIe Gen3 ) client/host it working as expected but seeing the reported issue in Gen4 Clients/hosts.

Could anyone please help me in getting possible reasons to understand this issue. Is there any additional reboot is required after running that command?

Please find my system details (failure host):

OS Name Microsoft Windows Server 2016 Datacenter

Version 10.0.14393 Build 14393

Other OS Description Not Available

OS Manufacturer Microsoft Corporation

System Name RC136-125-22-S2

System Manufacturer Supermicro

System Model Super Server

System Type x64-based PC

System SKU To be filled by O.E.M.

Processor Intel(R) Xeon(R) Gold 6314U CPU @ 2.30GHz, 2300 Mhz, 32 Core(s), 32 Logical Processor(s)

BIOS Version/Date American Megatrends International, LLC. 1.4a.V1, 12/13/2022

SMBIOS Version 3.3

Embedded Controller Version 255.255

BIOS Mode Legacy

BaseBoard Manufacturer Supermicro

BaseBoard Model Not Available

BaseBoard Name Base Board

Platform Role Enterprise Server

Secure Boot State Unsupported

PCR7 Configuration Not Available

Windows Directory C:\Windows

System Directory C:\Windows\system32

Boot Device \Device\HarddiskVolume1

Locale United States

Hardware Abstraction Layer Version = "10.0.14393.5501"

User Name Not Available

Time Zone Pacific Standard Time

Installed Physical Memory (RAM) 32.0 GB

Total Physical Memory 31.6 GB

Available Physical Memory 28.4 GB

Total Virtual Memory 36.4 GB

Available Virtual Memory 32.5 GB

Page File Space 4.75 GB

Page File C:\pagefile.sys

Device Guard Virtualization based security Not enabled

Hyper-V - VM Monitor Mode Extensions Yes

Hyper-V - Second Level Address Translation Extensions Yes

Hyper-V - Virtualization Enabled in Firmware No

Hyper-V - Data Execution Protection Yes

Answer 1

Hello

Thank you for posting in Microsoft Community forum.

Based on the information provided, it is possible that the issue is related to the PCIe Gen4 interface. It is recommended to check if the SSD and the PCIe slot are compatible with Gen4. Additionally, it is also recommended to check if there are any firmware or driver updates available for the SSD and the motherboard.

Regarding the question about additional reboot, it is not necessary to reboot the system after running the devcon64.exe command. However, it is recommended to check if the SSD is properly connected and configured in the BIOS settings.

If the issue persists, it is recommended to contact the manufacturer of the SSD and the motherboard for further assistance.

Best Regards

Zack Lu