• Data integrity with checksums are constantly getting check increasing uptime and minimizing unplanned downtime.
  • Metadata is written in another part of the disk so it is not lost.
  • Storage Pool Max Size: 4 Petabytes
  • Max File Size: 18 trillion bytes (18 Exabytes)
  • Max Volume Size: 1 Yottabye

Terabyte, Petabyte, Exabyte, Zettabyte, Yottabyte…TBD

New file system advantages:

  • Disk scrubbing –
  • Periodic volume scan to detect and auto-repair corruption
  • Protects against latent disk errors
  • Resiliency to corruptions with salvage for storage spaces – can mirror
  • removes non-repairable corrupt data to protect “live” data
  • Data striping for performance and redundancy
  • Storage pooling and virtualization
  • Shared storage pools across machines
  • Incorporates Microsoft’s write model, Copy-on-Write (COW), that is used with great success in SQL and Volume Shadow Copy Service (VSS) that enables users to make quick snapshots of large datasets.

Not supported features:

  • Named streams
  • Object IDs
  • Short names
  • Compression
  • File Level Encryption (EFS)
  • User data transations
  • Sparse
  • Hard-links
  • Extended attributes
  • Quotas
  • Cannot convert from NTFS to ReFS
  • Requires a fresh format to use ReFS
  • Not capable of being a boot volume

Recommended applications:

  • Data Volumes (i.e. File Servers)
  • SQL Databases
  • Exchange Databases
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