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Add blurb about the MBR and other utility block devices #80

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Jun 12, 2017
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Add blurb about the MBR and other utility block devices #80

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Added blurb around the utility block devices into the block device doc
geky May 1, 2017
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Copy edit block_device.md
Jun 1, 2017
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8 changes: 8 additions & 0 deletions docs/APIs/storage/block_device.md
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Expand Up @@ -28,6 +28,14 @@ Block devices indicate their block sizes through the `get_read_size`, `get_progr

As a rule of thumb, you can use the erase size for applications that use a single block size (for example, the FAT file system).

## Utility block devices

mbed OS contains several utility block devices to give you better control over the allocation of storage.

- With the [slicing block device](https://github.com/ARMmbed/mbed-os/blob/master/features/filesystem/bd/SlicingBlockDevice.h), you can partition storage into smaller block devices that you can use independentally.
- With the [chaining block device](https://github.com/ARMmbed/mbed-os/blob/master/features/filesystem/bd/ChainingBlockDevice.h), you can chain multiple block devices together and extend the usable amount of storage.
- mbed OS comes with support for storing partitions on disk with a [Master Boot Record (MBR)](https://en.wikipedia.org/wiki/Master_boot_record). The [MBR block device](https://github.com/ARMmbed/mbed-os/blob/master/features/filesystem/bd/MBRBlockDevice.h) provides this functionality and supports creating partitions at runtime or using preformatted partitions configured separately from outside the application.

## Example block devices

- [SDBlockDevice](https://github.com/armmbed/sd-driver) - Block device for SD cards.
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