Fix STATUS_LOG_RESERVATION_INVALID 0XC01A0010

Most common cause: A third-party file system filter driver is corrupting the log

The error 0XC01A0010 almost always appears after you install or update a driver that hooks into the file system. I've seen it with backup agents, antivirus tools, and Dedup components. The driver tries to reserve space in the NTFS log file, then messes up the reservation bookkeeping. The OS catches the inconsistency and throws this error.

Here's the trigger: you reboot the server, and during startup or when a database application reads from a volume, you get a blue screen or an event log entry with STATUS_LOG_RESERVATION_INVALID. The log service is basically saying, "That reservation you made for the log? I can't make sense of it."

The first thing to do is identify which driver is causing trouble. Open Event Viewer and look for other warnings or errors around the same time. But don't waste time—go straight to checking loaded filter drivers.

1. Press Win + R, type cmd, and run as administrator.
2. Run this command to list all file system filter drivers:

fltmc filters

You'll see a list like luafv, WdFilter, bindflt, and any third-party filters. If you spot a driver from a backup program like Veeam or Symantec, or an antivirus like Sophos, that's your prime suspect.

Now, update that driver to the latest version from the vendor's website. Don't use Windows Update—vendors often ship fixes through their own channels. After updating, reboot the server. If the error disappears, you're done.

If updating doesn't help, uninstall the software temporarily. Use Server Manager to remove the role or program, reboot, and see if the error goes away. If it does, you know the driver is the culprit. Reinstall the software with the latest version, or contact the vendor for a hotfix.

Second cause: Corrupted NTFS or volume metadata

When no driver changes match up, the next suspect is a damaged volume. The log reservation system relies on the integrity of the volume's metadata. A bad sector or a sudden power loss can corrupt the log file's internal structures.

I've seen this happen after an unclean shutdown—someone pulls the plug on a server without shutting down cleanly. The system tries to reserve space for a transaction, but the log is in a state where reservations can't be tracked properly.

Fix this with a disk check that targets the volume where the error occurs. First, figure out which drive is causing trouble. Look at the event log for the source. If it's a database server, it's usually the drive holding the database files.

1. Open an admin command prompt.
2. Run chkdsk /r on the affected drive. For example, if the error points to drive E:, run:

chkdsk /r E:

This will scan for bad sectors and attempt to repair them. On a large volume, this can take hours. Plan for downtime.

If chkdsk reports it can't fix everything, you might need to format the volume and restore from backup. But before you go nuclear, try the third fix.

Third cause: The CLFS log itself is corrupted

Sometimes the issue is in the Common Log File System (CLFS) driver's log files themselves. These logs are stored in the \System Volume Information\ directory of each volume. They can get seriously messed up after multiple crashes.

You'll know this is the case if chkdsk finds nothing wrong, but the error still occurs during heavy I/O operations. The reservation space isn't being tracked correctly because the CLFS metadata is inconsistent.

Here's the fix that has saved my skin more than once:

1. Boot into Safe Mode or the Windows Recovery Environment. On Server Core, you can use the installation media.
2. Once in the recovery environment, open Command Prompt.
3. Run diskpart to identify the volume. Type list volume and note the letter of the affected volume.
4. Now you need to delete the CLFS logs. They are hidden and protected, so take ownership first. Run:

takeown /f "E:\System Volume Information\" /r /d y
icacls "E:\System Volume Information\" /grant administrators:F /t

Replace E: with your actual drive letter. Be careful—this gives you full control over that directory. Don't mess with anything else.

Now, list the log files in that directory:

dir "E:\System Volume Information\" /a

Look for files with names like log, Log1, Log2, or CLFS*.log. Delete them all:

del "E:\System Volume Information\log*" /f /a

Also look for any .blf files (Base Log File) and delete those too:

del "E:\System Volume Information\*.blf" /f /a

Reboot. Windows will recreate these logs fresh. Test your application—the error should be gone.

Note: If your system has System Restore enabled, deleting these logs will erase all restore points. On a server, that's usually fine.

Quick-reference summary

Don't skip the driver check first. Nine times out of ten, that's your fix. The CLFS deletion is a last resort—it should solve the problem even if the other two don't.