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The block index of the block in which to write the data. A block index is a logical
index in units of 512 KiB blocks. To identify the block index, divide
the logical offset of the data in the logical volume by the block size (logical offset of
data/524288). The logical offset of the data must be 512
KiB aligned.
A Base64-encoded SHA256 checksum of the data. Only SHA256 checksums are supported.
The algorithm used to generate the checksum. Currently, the only supported algorithm
is SHA256.
The size of the data to write to the block, in bytes. Currently, the only supported
size is 524288 bytes.
Valid values: 524288
Optional ProgressThe progress of the write process, as a percentage.
The ID of the snapshot.
If the specified snapshot is encrypted, you must have permission to use the KMS key that was used to encrypt the snapshot. For more information, see Using encryption in the Amazon Elastic Compute Cloud User Guide..
The data to write to the block.
The block data is not signed as part of the Signature Version 4 signing process. As a result, you must generate and provide a Base64-encoded SHA256 checksum for the block data using the x-amz-Checksum header. Also, you must specify the checksum algorithm using the x-amz-Checksum-Algorithm header. The checksum that you provide is part of the Signature Version 4 signing process. It is validated against a checksum generated by Amazon EBS to ensure the validity and authenticity of the data. If the checksums do not correspond, the request fails. For more information, see Using checksums with the EBS direct APIs in the Amazon Elastic Compute Cloud User Guide.