---
title: LongLBAModeParameterBlockDescriptor
framework: IOKit
role: symbol
role_heading: Structure
platforms: [Mac Catalyst 13.0+, macOS 10.3+]
path: iokit/longlbamodeparameterblockdescriptor
---

# LongLBAModeParameterBlockDescriptor

## Declaration

```occ
typedef struct LongLBAModeParameterBlockDescriptor {
    ...
} LongLBAModeParameterBlockDescriptor;
```

## Overview

Overview Long LBA mode parameter block descriptor.

## Topics

### Instance Properties

- [BLOCK_LENGTH](iokit/longlbamodeparameterblockdescriptor/1555445-block_length.md)
- [DENSITY_CODE](iokit/longlbamodeparameterblockdescriptor/1555551-density_code.md)
- [NUMBER_OF_BLOCKS](iokit/longlbamodeparameterblockdescriptor/1555498-number_of_blocks.md)
- [RESERVED](iokit/longlbamodeparameterblockdescriptor/1555542-reserved.md)