Block cloning allows the server to speed up the copy operations which results in the quick merging of VM checkpoints. It can significantly improve the performance of virtualized workloads using Block cloning and Sparse VDL. Finally, there is a scrubber in ReFS that periodically analyzes the volume, checks for corrupt data and corrects them.Īs you all know, ReFS was first introduced on Windows Server 2012, so accelerated VM operation is one of the important features of the new file system. In fact, you don’t need to run any tool for error correction as it has a self-repairing ability.Īnd in case, there is no mirrored copy of the corrupt data, it removes the namespace from the local area, but ensures to keep the volume online. So you don’t need to reboot your computer to run the “ chkdsk” command-line tool to repair Windows disk errors. Not to mention, the disk or volume can be in use while correcting the error, a key feature offered by ReFS. It does so by using the alternate copy of the mirrored data provided by Storage Spaces. In fact, it can also optionally inspect the checksums for file data, which may take more time, but the data can be fully validated.Īpart from that, ReFS comes with Storage Spaces integration, which repairs the errors automatically. It employs something called integrity streams that basically analyze the checksums for metadata to precisely detect the error. Basically, ReFS can automatically repair data corruption, making it stand on par with competing file systems like Btrfs and ZFS. The first and foremost feature that makes ReFS a resilient file system, unlike NTFS, is the built-in ability to accurately detect corruption and fix them without rebooting the system. NTFS vs ReFS: Key Features Differences Resiliency to Data Corruption In a single instruction, it can read and write data on files, lowering disk input and output operations, and bringing disk usage, memory, and power consumption down. The on-disk structure for both metadata and file data is based on B+ trees.Īpart from that, ReFS uses an allocation-on-write (also called copy-on-write) strategy for metadata to avoid data corruption during an unexpected shutdown. The root can be a node with multiple children or a leaf. Unlike the B-tree structure in NTFS, ReFS utilizes B+ trees, which include root, internal nodes, and leaves. It actually uses some of the NTFS code and has derived most of the features too. ReFS is not a new file system developed from the ground up.
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