vitastor/docs/hugo/content/usage/nbd.md

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---
title: NBD
weight: 6
---
To create a local block device for a Vitastor image, use NBD. For example:
```
vitastor-nbd map --etcd_address 10.115.0.10:2379/v3 --image testimg
```
It will output the device name, like /dev/nbd0 which you can then format and mount as a normal block device.
You can also use `--pool <POOL> --inode <INODE> --size <SIZE>` instead of `--image <IMAGE>` if you want.
To unmap the device run:
```
vitastor-nbd unmap /dev/nbd0
```