BlockDeviceMapping
Describes a block device mapping.
Contents
- DeviceName
-
The device name assigned to the volume (for example,
/dev/sdhorxvdh). For more information, see Device naming on Linux instances in the Amazon EC2 User Guide for Linux Instances.Note
To define a block device mapping, set the device name and exactly one of the following properties:
Ebs,NoDevice, orVirtualName.Type: String
Length Constraints: Minimum length of 1. Maximum length of 255.
Pattern:
[\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*Required: Yes
- Ebs
-
Information to attach an EBS volume to an instance at launch.
Type: Ebs object
Required: No
- NoDevice
-
Setting this value to
trueprevents a volume that is included in the block device mapping of the AMI from being mapped to the specified device name at launch.If
NoDeviceistruefor the root device, instances might fail the EC2 health check. In that case, Amazon EC2 Auto Scaling launches replacement instances.Type: Boolean
Required: No
- VirtualName
-
The name of the instance store volume (virtual device) to attach to an instance at launch. The name must be in the form ephemeralX where X is a number starting from zero (0), for example,
ephemeral0.Type: String
Length Constraints: Minimum length of 1. Maximum length of 255.
Pattern:
[\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*Required: No
See Also
For more information about using this API in one of the language-specific AWS SDKs, see the following:
