Microsoft Finally Announces ReFS Boot Support for Windows Server

After years of demand, Microsoft has finally announced ReFS boot support for Windows Server Insiders. Since server workloads now demand speed, reliability, and massive capacity, Microsoft’s latest update looks to modernize the OS boot volume like never before.

Windows Server introduces ReFS Boot for insiders

For the first time, Windows Server can be installed and booted from a Resilient File System (ReFS). For those unaware, it is a formatted drive directly through the setup UI. ReFS, designed for data integrity at scale, now protects the most critical volume on your server; the OS boot disk. Microsoft says this ensures greater resilience, scalability, and performance from startup, reducing downtime and mitigating corruption risks.

The new ReFS boot volume brings several advantages over traditional NTFS. Integrity-first, copy-on-write design allows online error handling without requiring chkdsk. Metadata checksums, integrity streams, and proactive error detection enhance reliability. Volumes can scale up to 35 petabytes, far beyond NTFS’s 256 TB limit, future-proofing servers as storage needs grow.

Performance is also improved. ReFS accelerates creation of fixed-size VHD(X) files, speeds up large file copy operations, and supports sparse provisioning to optimize I/O-heavy scenarios. Microsoft claims tasks that used to take minutes can now complete in seconds or milliseconds, independent of file size.

Getting Started With ReFS Boot

Windows Server Insiders can access ReFS boot in the latest builds (2/11/26 or later). Users need UEFI firmware and must format the system drive as ReFS during setup. After installation, simple commands like fsutil fsinfo volumeInfo C: can confirm the drive is using ReFS.

Microsoft further highlights that this launch is just the beginning. By combining resiliency, scalability, and speed, ReFS boot brings modern server capabilities to the OS volume, which will eventually keep systems stable and responsive from day one.

Moreover, the company has encouraged Insiders to try the feature and provide feedback via the the Windows Server Insiders Forum.