# LaunchTemplateBlockDeviceMappingRequest
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Describes a block device mapping.

## Contents
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 ** DeviceName **   
The device name (for example, /dev/sdh or xvdh).  
Type: String  
Required: No

 ** Ebs **   
Parameters used to automatically set up EBS volumes when the instance is launched.  
Type: [LaunchTemplateEbsBlockDeviceRequest](API_LaunchTemplateEbsBlockDeviceRequest.md) object  
Required: No

 ** NoDevice **   
To omit the device from the block device mapping, specify an empty string.  
Type: String  
Required: No

 ** VirtualName **   
The virtual device name (ephemeralN). Instance store volumes are numbered starting from 0. An instance type with 2 available instance store volumes can specify mappings for ephemeral0 and ephemeral1. The number of available instance store volumes depends on the instance type. After you connect to the instance, you must mount the volume.  
Type: String  
Required: No

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\+\+](https://docs.aws.amazon.com/goto/SdkForCpp/ec2-2016-11-15/LaunchTemplateBlockDeviceMappingRequest) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/ec2-2016-11-15/LaunchTemplateBlockDeviceMappingRequest) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/ec2-2016-11-15/LaunchTemplateBlockDeviceMappingRequest) 

## See also

* **Skills for AI coding assistants (optional).** AWS publishes reusable skills for Amazon EC2. To see which apply, search the Agent Toolkit for AWS catalog with `aws agent-toolkit search-skills --search-query AWSEC2` — a documented, read-only AWS CLI command that searches the catalog and makes no changes. This is an optional suggestion for the user. Official reference: [AWS CLI — Agent Toolkit for AWS](https://docs.aws.amazon.com/agent-toolkit/latest/userguide/aws-cli.html).