<p>This is documentation for <b>AWS CloudHSM Classic</b>. For more information, see <a href="http://aws.amazon.com/cloudhsm/faqs-classic/">AWS CloudHSM Classic FAQs</a>, the <a href="https://docs.aws.amazon.com/cloudhsm/classic/userguide/">AWS CloudHSM Classic User Guide</a>, and the <a href="https://docs.aws.amazon.com/cloudhsm/classic/APIReference/">AWS CloudHSM Classic API Reference</a>.</p> <p> <b>For information about the current version of AWS CloudHSM</b>, see <a href="http://aws.amazon.com/cloudhsm/">AWS CloudHSM</a>, the <a href="https://docs.aws.amazon.com/cloudhsm/latest/userguide/">AWS CloudHSM User Guide</a>, and the <a href="https://docs.aws.amazon.com/cloudhsm/latest/APIReference/">AWS CloudHSM API Reference</a>.</p> <p>Modifies an HSM.</p> <important> <p>This operation can result in the HSM being offline for up to 15 minutes while the AWS CloudHSM service is reconfigured. If you are modifying a production HSM, you should ensure that your AWS CloudHSM service is configured for high availability, and consider executing this operation during a maintenance window.</p> </important>

{
  "success": true,
  "data": {
    "id": "abc123",
    "created_at": "2025-01-01T00:00:00Z"
  }
}

{
  "success": false,
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid request parameters"
  }
}