Reference
Full Disk Read with a Small Backup Upload
Where claims-driven source-side deduplication is active, a full read can still produce a small upload.
The Short Answer
When claims-driven source-side deduplication is active on a full-read backup, EBA-ST can check which blocks the repository already holds and skip sending those blocks.
That claims-enabled path can make a full read produce a small upload. RAW Block Sendense CBT instead sends the full source through ingest, while repository deduplication still avoids retaining duplicate content.
Reducing The Reads Too
On VMware, changed-block tracking means later backups read only changed blocks. On supported CloudStack KVM backends, snagent extent maps do the same. Where neither applies, the read stays full. Upload reduction depends on claims-driven source-side deduplication being active; RAW Block Sendense CBT uses full-source ingest.
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