> For the complete documentation index, see [llms.txt](https://docs.hiero.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.hiero.org/block-node-home/block-stream-cutover.md).

# Block Stream Cutover

{% hint style="warning" %}
One-time migration guidance for operators transitioning from the legacy Record Stream format to Block Streams. If you are setting up a new Block Node today, this section does not apply to you.
{% endhint %}

<table data-view="cards"><thead><tr><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><strong>Record Stream to Block Stream</strong></td><td>Overview of the migration from the legacy Record Stream format to the new Block Stream, including the WRB bridging mechanism.</td><td><a href="/pages/cFSxpEs38cqkjvVZXqle">/pages/cFSxpEs38cqkjvVZXqle</a></td></tr><tr><td><strong>Cutover Process and Timeline</strong></td><td>Phase-by-phase cutover sequence, key milestones, and what changes at each network release.</td><td><a href="/pages/ZC0CM6Oc0u3MPmsTnDQf">/pages/ZC0CM6Oc0u3MPmsTnDQf</a></td></tr><tr><td><strong>Preparing for WRB Cutover</strong></td><td>Steps to prepare your Block Node for the Wrapped Record Block cutover, including backfill and jumpstart data setup.</td><td><a href="/pages/KHpleYT5g7W6JsDZFaKg">/pages/KHpleYT5g7W6JsDZFaKg</a></td></tr><tr><td><strong>WRB CLI Runbook</strong></td><td>Command-by-command runbook for the WRB CLI tool used to generate and load jumpstart data before cutover.</td><td><a href="/pages/VtgS6AOncPDJJtNmpIcF">/pages/VtgS6AOncPDJJtNmpIcF</a></td></tr></tbody></table>


---

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