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How to block d3hot sending to HBA in Windows servers 2019 system

Anonymous
2023-10-11T09:41:51+00:00

HI：

In the Windows servers 2019 system, when uninstalling the storport driver for an HBA, the Windows system will issue a d3hot. How to block or prevent the system from issuing a d3hot to an HBA

Windows Server | Performance and maintenance

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  1. Anonymous
    2023-10-12T03:37:24+00:00

    Hello

    D3hot (Device Power State D3) is a low-power state for a device, typically used in power management. If your goal is to prevent the system from putting an HBA (Host Bus Adapter) into D3hot when you uninstall its driver, this might not be a straightforward process, as the device power state transitions are usually managed by the operating system and hardware drivers.I can't find any specific way to prevent or prevent the system from issuing d3hot to the HBA.

    Here are some general steps you can consider:

    Update Device Drivers:

    Make sure you have the latest drivers for the HBA installed. Sometimes, older drivers may not handle power state transitions correctly. Updated drivers might improve compatibility.

    Check BIOS/UEFI Settings:

    Access your server's BIOS/UEFI settings and review power management or ACPI-related options. Some systems allow you to configure how devices are powered and may offer more control over power states.

    Device Manager Settings:

    In Device Manager, right-click on the HBA and go to "Properties." Under the "Power Management" tab, uncheck the option that allows Windows to turn off this device to save power.

    Group Policy Settings:

    You can modify Group Policy settings to control power management for devices. Group Policy allows for more advanced control over device power settings. Be cautious with these settings, as they can affect multiple devices.

    Registry Settings:

    There are certain registry settings you can use to control power management for devices. Modifying the registry can be risky, so proceed with caution and back up your registry before making any changes.

    Custom Device Drivers:

    In some cases, if you have the capability, you may consider developing custom device drivers to manage power states for the HBA. This would be a complex and advanced approach.

    Making changes to power management settings can affect the overall power consumption and performance of your system. It's essential to understand the potential implications and thoroughly test any changes in a controlled environment.

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