writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}
	opts.Versioned = versioned
	opts.VersionSuspended = suspended

	// First, we compute the ETag of the multipart object.
	// The ETag of a multi-part object is always:
	//   ETag := MD5(ETag_p1, ETag_p2, ...)+"-N"   (N being the number of parts)
	//
	// This is independent of encryption. An encrypted multipart