BCD Writing/Updating Frequency Invokes Updating Booting Entries: A Windows Issue

Introduction

In this article, we will discuss an issue that has been detected in Windows, where there is an increase in disk activity and writes to BCD.log files. These files are typically not a part of the NTFS system files, so it is essential to understand why this is happening and how to address it.

Understanding BCD and its Log Files

Before we dive into the issue, let's first understand what BCD is and what its log files are used for. BCD stands for Boot Configuration Data, which is a database used by Windows to store information about the system's boot configuration. This information includes details about the operating system, boot applications, and device drivers required to start the system.

BCD log files are used to store information about the changes made to the BCD database. These log files are essential for troubleshooting and recovery purposes, as they provide a record of the changes made to the BCD database. However, if there is an increase in disk activity and writes to these log files, it could indicate an issue with the system's boot configuration or a problem with the disk itself.

Locating BCD Log Files

BCD log files are typically located in the %windir%\Logs\BCD directory. You can access this directory by opening the Command Prompt and typing the following command:

Detecting Disk Activity Towards BCD Log Files

To detect disk activity towards BCD log files, you can use the Resource Monitor tool in Windows. Here's how to do it:

1. Press Ctrl + Shift + Esc to open the Task Manager.
2. Click on the Performance tab.
3. Click on Open Resource Monitor at the bottom of the window.
4. In the Resource Monitor window, click on the Disk tab.
5. Under the Disk Activity section, look for any writes to the BCD.log files.

Interpreting Disk Activity

If you see an increase in disk activity towards the BCD.log files, it could indicate an issue with the system's boot configuration or a problem with the disk itself. It is essential to monitor the disk activity over time to determine if it is a recurring issue or a one-time event.

Addressing the Issue

If you have determined that there is an issue with the system's boot configuration or a problem with the disk, you can take the following steps to address it:

1. Run a disk check to ensure that there are no issues with the disk.
2. Use the System File Checker tool to ensure that all system files are intact.
3. Use the Bootrec.exe tool to repair the BCD database.
4. Check for any updates to the system's drivers and firmware.
5. Consider reinstalling the operating system if the issue persists.

In this article, we have discussed an issue in Windows where there is an increase in disk activity and writes to BCD.log files. We have explained what BCD is, what its log files are used for, and how to detect disk activity towards these log files. We have also provided steps to address the issue, including running a disk check, using the System File Checker tool, using the Bootrec.exe tool, checking for updates to drivers and firmware, and reinstalling the operating system if necessary.

References

• BCD - Boot Configuration Data Store
• Bcdedit
• Bootrec
• Sfc