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| HDF5 Last Updated on 2026-03-23 The HDF5 Field Guide

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H5FD_onion_header_t Struct Reference

`#include <src/H5FDonion_header.h>`

## Data Fields
uint32_t | checksum
uint32_t | flags
uint64_t | history_addr
uint64_t | history_size
uint64_t | origin_eof
uint32_t | page_size
uint8_t | version

## Field Documentation

## ◆ checksum

uint32_t checksum

## ◆ flags

uint32_t flags

## ◆ history_addr

uint64_t history_addr

## ◆ history_size

uint64_t history_size

## ◆ origin_eof

uint64_t origin_eof

## ◆ page_size

uint32_t page_size

## ◆ version

uint8_t version

The documentation for this struct was generated from the following file:

- src/H5FDonion_header.h