SQL Server 2025 Installation Fails – Error 0x851A001A, NVMe 32KB Sector Size Despite Registry Workaround

dor shaked 0 Reputation points
2026-11-08T10:04:03.7666667+00:00

Hello Microsoft Support Community,

I'm experiencing a persistent SQL Server 2025 installation failure on my Lenovo Legion Pro 5 laptop running Windows 11 Home.

I have attempted to install both SQL Server 2025 Developer Edition and Express Edition. Both installations fail during Database Engine initialization.

I have already performed extensive troubleshooting, including applying Microsoft's documented NVMe sector-size Registry workaround, but the problem persists.

1. System Information

Manufacturer: Lenovo

Laptop Model: Lenovo Legion Pro 5 16IRX10 (to be confirmed)

Operating System: Windows 11 Home, 64-bit (Build 26200)

Storage: Two Western Digital NVMe SSDs, approximately 1TB each

SSD Model: WD PC SN8000S SDEPNRK-1T00-1101

Storage Controllers: Two Standard NVM Express Controllers

NVMe Driver Service: stornvme

SQL Server Versions Attempted: SQL Server 2025 Developer and Express

2. SQL Server Installation Error

Both editions fail during Database Engine initialization.

The installation summary reports:

Exit Code: -2061893606

Component Error Code: 0x851A001A

Failed Component: SQL Server Database Engine Services

Error Message: "Wait on the Database Engine recovery handle failed."

The installation summary also reports the following warning:

"LargeSectorSizeCheck – One or more disks intended for SQL Server data have a physical sector size greater than 4 KB."

The SQL Server ERRORLOG also contains messages concerning misaligned log I/O operations, followed by a fatal server termination during startup.

3. Storage Sector Size Investigation

I executed the following commands:

fsutil fsinfo sectorinfo C:

fsutil fsinfo sectorinfo D:

Both SSDs report the same values:
Property Value
LogicalBytesPerSector 512
PhysicalBytesPerSectorForAtomicity 4096
PhysicalBytesPerSectorForPerformance 32768
FileSystemEffectivePhysicalBytesPerSectorForAtomicity 4096

The most concerning value is PhysicalBytesPerSectorForPerformance = 32768, equivalent to 32KiB.

I suspect this may be preventing SQL Server from initializing successfully.

4. Registry Workaround Already Applied

I applied the documented Registry workaround under:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\stornvme\Parameters\Device

Configuration:

Value Name: ForcedPhysicalSectorSizeInBytes

Value Type: REG_MULTI_SZ

Value Data: * 4095

I confirmed the Registry value is correctly entered and restarted Windows after applying it.

However, both SSDs still report:

PhysicalBytesPerSectorForPerformance = 32768

Therefore, the workaround does not appear to be taking effect.

5. Additional Troubleshooting Performed

Uninstalled the previous SQL Server installation.

Attempted a clean installation of SQL Server 2025.

Tried both Developer and Express editions.

Verified that both NVMe controllers use the stornvme driver service.

Confirmed that the Microsoft Storage Spaces Controller uses the spaceport service.

Verified that both physical SSDs report identical sector-size information.

Confirmed the Registry workaround is configured correctly.

Restarted Windows after applying the Registry workaround.

Retested the reported sector sizes after restarting.

Reviewed the SQL Server installation Summary and ERRORLOG files.

Despite these steps, SQL Server still fails during Database Engine initialization.

6. Questions

I would appreciate assistance with the following:

Why does Windows continue reporting a 32KB physical sector size for performance despite the ForcedPhysicalSectorSizeInBytes Registry workaround?

Is there a known compatibility issue involving SQL Server 2025, Windows 11 Build 26200, and Western Digital NVMe SSDs installed in Lenovo Legion Pro 5 laptops?

Are there any additional supported troubleshooting steps to make the Registry workaround effective?

Could the SQL Server Database Engine initialization failure have another underlying cause?

Is there a supported solution that would allow me to install SQL Server locally without reinstalling Windows, replacing the SSDs, or making potentially unsafe storage configuration changes?

I am a software engineering student and need SQL Server for database coursework and development projects.

SQL Server Management Studio is already installed and functioning correctly, but I cannot install or start the local SQL Server Database Engine.

I can provide the SQL Server installation Summary.txt and ERRORLOG files if required.

Thank you for your time and assistance.

SQL Server 2025 Installation Fails – Error 0x851A001A, NVMe 32KB Sector Size Despite Registry Workaround

Hello Microsoft Support Community,

I'm experiencing a persistent SQL Server 2025 installation failure on my Lenovo Legion Pro 5 laptop running Windows 11 Home.

I have attempted to install both SQL Server 2025 Developer Edition and Express Edition. Both installations fail during Database Engine initialization.

I have already performed extensive troubleshooting, including applying Microsoft's documented NVMe sector-size Registry workaround, but the problem persists.

1. System Information

Manufacturer: Lenovo

Laptop Model: Lenovo Legion Pro 5 16IRX10 (to be confirmed)

Operating System: Windows 11 Home, 64-bit (Build 26200)

Storage: Two Western Digital NVMe SSDs, approximately 1TB each

SSD Model: WD PC SN8000S SDEPNRK-1T00-1101

Storage Controllers: Two Standard NVM Express Controllers

NVMe Driver Service: stornvme

SQL Server Versions Attempted: SQL Server 2025 Developer and Express

2. SQL Server Installation Error

Both editions fail during Database Engine initialization.

The installation summary reports:

Exit Code: -2061893606

Component Error Code: 0x851A001A

Failed Component: SQL Server Database Engine Services

Error Message: "Wait on the Database Engine recovery handle failed."

The installation summary also reports the following warning:

"LargeSectorSizeCheck – One or more disks intended for SQL Server data have a physical sector size greater than 4 KB."

The SQL Server ERRORLOG also contains messages concerning misaligned log I/O operations, followed by a fatal server termination during startup.

3. Storage Sector Size Investigation

I executed the following commands:

fsutil fsinfo sectorinfo C:

fsutil fsinfo sectorinfo D:

Both SSDs report the same values:

Property Value
LogicalBytesPerSector 512
PhysicalBytesPerSectorForAtomicity 4096
PhysicalBytesPerSectorForPerformance 32768
FileSystemEffectivePhysicalBytesPerSectorForAtomicity 4096

The most concerning value is PhysicalBytesPerSectorForPerformance = 32768, equivalent to 32KiB.

I suspect this may be preventing SQL Server from initializing successfully.

4. Registry Workaround Already Applied

I applied the documented Registry workaround under:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\stornvme\Parameters\Device

Configuration:

Value Name: ForcedPhysicalSectorSizeInBytes

Value Type: REG_MULTI_SZ

Value Data: * 4095

I confirmed the Registry value is correctly entered and restarted Windows after applying it.

However, both SSDs still report:

PhysicalBytesPerSectorForPerformance = 32768

Therefore, the workaround does not appear to be taking effect.

5. Additional Troubleshooting Performed

Uninstalled the previous SQL Server installation.

Attempted a clean installation of SQL Server 2025.

Tried both Developer and Express editions.

Verified that both NVMe controllers use the stornvme driver service.

Confirmed that the Microsoft Storage Spaces Controller uses the spaceport service.

Verified that both physical SSDs report identical sector-size information.

Confirmed the Registry workaround is configured correctly.

Restarted Windows after applying the Registry workaround.

Retested the reported sector sizes after restarting.

Reviewed the SQL Server installation Summary and ERRORLOG files.

Despite these steps, SQL Server still fails during Database Engine initialization.

6. Questions

I would appreciate assistance with the following:

Why does Windows continue reporting a 32KB physical sector size for performance despite the ForcedPhysicalSectorSizeInBytes Registry workaround?

Is there a known compatibility issue involving SQL Server 2025, Windows 11 Build 26200, and Western Digital NVMe SSDs installed in Lenovo Legion Pro 5 laptops?

Are there any additional supported troubleshooting steps to make the Registry workaround effective?

Could the SQL Server Database Engine initialization failure have another underlying cause?

Is there a supported solution that would allow me to install SQL Server locally without reinstalling Windows, replacing the SSDs, or making potentially unsafe storage configuration changes?

I am a software engineering student and need SQL Server for database coursework and development projects.

SQL Server Management Studio is already installed and functioning correctly, but I cannot install or start the local SQL Server Database Engine.

I can provide the SQL Server installation Summary.txt and ERRORLOG files if required.

Thank you for your time and assistance.

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  1. AI answer

    2026-11-08T10:05:11.0933333+00:00

    The safest supported way to run SQL Server 2025 locally on this machine without changing the SSD configuration is a Linux-based SQL Server container; the native Windows installation cannot proceed while Windows continues exposing a 32-KB sector size.

    What the sector output establishes

    Microsoft instructs using the larger of PhysicalBytesPerSectorForAtomicity and PhysicalBytesPerSectorForPerformance. Your larger value is 32768, so SQL Server sees a 32-KB sector size—not 4 KB. SQL Server supports only 512-byte and 4,096-byte sector sizes, and the documented symptoms include 0x851A001A, recovery-handle failure, and misaligned log I/O messages.^1^

    Therefore, this is not merely a harmless performance hint. Your LargeSectorSizeCheck warning and ERRORLOG entries match the documented failure scenario closely.

    The registry value you used—REG_MULTI_SZ, data * 4095, under the stornvme\Parameters\Device key—is the documented value. After a restart, it is supposed to make attached drives appear as 4 KB.^1^ Because your post-restart fsutil output remains 32768, the override has not changed the storage presentation seen by Windows. The available documentation does not establish why it is being ignored on this specific laptop, driver stack, or firmware.

    Do not add Trace Flag 1800. Microsoft states it is unnecessary for this installation scenario; that flag addresses transaction-log I/O behavior on an already installed instance, not a Windows volume still exposed as larger than 4 KB.^2^

    Immediate supported development solution

    Install Docker Desktop in Linux container mode, then use either of these methods.

    Option 1: Visual Studio Code

    1. Install Visual Studio Code and its MSSQL extension.
    2. Start Docker Desktop in Linux container mode.
    3. Open the MSSQL extension’s Connections view.
    4. Select the option to create a Local SQL Server container.
    5. Choose SQL Server 2025, a container name, password, and port.
    6. Start the container and connect through the MSSQL extension.

    This feature runs on Windows when Docker Desktop or an equivalent is operating in Linux-container mode. It supports SQL Server 2025 by default and is intended for development and testing.^3^

    Option 2: Docker command line

    Run PowerShell after Docker Desktop is started:

    docker pull mcr.microsoft.com/mssql/server:2025-latest

docker run --name sql2025 --hostname sql2025 `
  -e "ACCEPT_EULA=Y" `
  -e "MSSQL_SA_PASSWORD=Replace-With-A-Strong-Password!" `
  -p 1433:1433 -d `
  mcr.microsoft.com/mssql/server:2025-latest

    Connect from SSMS to localhost,1433 using SQL authentication and the sa password supplied above. The image uses Developer edition by default.^4^

    Container removal can delete databases stored inside it. Export backups or configure persistent container storage before keeping coursework there.^4^

    Native Windows installation path

    Windows 11 Home is supported for SQL Server 2025 Express, so the Windows edition itself is not the blocker.^5^

    There is no published SQL Server 2025 known issue specifically naming Windows build 26200, WD SN8000S, or Lenovo Legion systems.^6^ To pursue a native installation:

    1. Install all Lenovo BIOS, chipset, and storage-firmware updates intended for the exact model.
    2. Ask Lenovo or Western Digital whether that NVMe firmware reports an Optimal Write Size or related value of 32 KB through StorNVMe.
    3. If it remains unchanged, open a Microsoft support case and provide:
      • fsutil fsinfo sectorinfo C: and D: output;
      • exported stornvme\Parameters\Device registry key;
      • SQL Summary.txt, Detail.txt, and ERRORLOG;
      • Windows build, BIOS version, SSD firmware, and controller driver details.

    A different underlying SQL cause is possible because 0x851A001A is generic, but your sector warning and misaligned-I/O termination already provide a concrete startup failure. Reinvestigate other causes only if a volume reports no value above 4096 and SQL Server still fails.

    References

    1. Troubleshoot SQL Server errors related to system disk sector size ...
    2. Performance degradation caused by misaligned I/O sector size errors in SQL Server
    3. Local SQL Server container
    4. Quickstart: Run SQL Server Linux container images with Docker (cs1-bash)
    5. Hardware and software requirements for SQL Server 2025
    6. SQL Server 2025 Known Issues - SQL Server | Microsoft Learn
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