---
title: DASDModeParameterBlockDescriptor
framework: Kernel
role: symbol
role_heading: Type Alias
platforms: [macOS 10.3+]
path: kernel/dasdmodeparameterblockdescriptor
---

# DASDModeParameterBlockDescriptor

## Declaration

```occ
typedef struct DASDModeParameterBlockDescriptor DASDModeParameterBlockDescriptor;
```

## Discussion

Discussion Direct Access Storage Device mode parameter block descriptor.

## Topics

### Instance Properties

- [BLOCK_LENGTH](kernel/dasdmodeparameterblockdescriptor/1476552-block_length.md)
- [DENSITY_CODE](kernel/dasdmodeparameterblockdescriptor/1476557-density_code.md)
- [NUMBER_OF_BLOCKS](kernel/dasdmodeparameterblockdescriptor/1476430-number_of_blocks.md)