Backup Engine
Block-level. Deduped. Incremental forever.
VSS snapshot, NTFS bitmap walk, content-defined deduplication. The backup engine grows incrementally and never bloats. Multi-volume support for system + recovery + data partitions.
Click to enlargeHow it works
How block-level imaging works
Four steps, every backup. The engine quiesces the OS, reads only the blocks that hold data, dedupes them against everything you’ve ever stored, encrypts, and writes to a content-addressed store.
VSS Snapshot → NTFS Bitmap → Dedup → Encrypt → Store — the same pipeline runs on every backup.
Inside the engine
Three techniques, one consistent image.
VSS Snapshot
Quiesce the OS and freeze writers, then take a moment-in-time snapshot — a consistent image of a live, running machine. No torn files, no half-written databases.
NTFS Bitmap Walk
Read the NTFS allocation bitmap to capture only the blocks that hold data, skipping empty regions — so a sparse 1 TB drive only reads what is actually used.
Content-Defined Dedup
Identical chunks across every backup are stored once in a content-addressed store. No “synthetic full” ever — the manifest references chunks directly and grows by delta only, so the chain never gets more fragile.
Bootable, not just copied.
Modern Windows installs span 4+ partitions: System Reserved (1MB), MSR (16MB), recovery (~500MB), and main C:. We image all of them together — so a restore puts the machine back to bootable, not just “the C: drive copied.”
- System Reserved + MSR + recovery + C: — captured in one image
- Restores to a bootable machine, not a bare data copy
- 10M+ files per device with no performance degradation
Click to enlargeBlock-level. Forever incremental.
VSS snapshot, NTFS bitmap walk, content-defined dedup — the backup engine that grows by delta only and never bloats.