// look for directoryEndSignature in the last 1k, then in the last 65k
	var buf []byte
	var directoryEndOffset int64
	for i, bLen := range []int64{1024, 65 * 1024} {
		if bLen > size {
			bLen = size
		}
		buf = make([]byte, int(bLen))
		if _, err := r.ReadAt(buf, size-bLen); err != nil && err != io.EOF {
			return nil, 0, err
		}

		ETag:   ETag{144, 64, 44, 120, 210, 220, 205, 222, 225, 233, 232, 98, 34, 206, 44, 99, 97, 103, 95, 53, 41, 210, 96, 0, 174, 46, 144, 15, 242, 22, 179, 203, 89, 225, 48, 224, 146, 216, 162, 152, 30, 119, 111, 77, 11, 214, 9, 65},
	},

	{String: `"3b83ef96387f14655fc854ddc3c6bd57`, ShouldFail: true},                                                                  // 6

	_ = x[ErrReplicationNoExistingObjects-60]
	_ = x[ErrReplicationValidationError-61]
	_ = x[ErrReplicationPermissionCheckError-62]
	_ = x[ErrObjectRestoreAlreadyInProgress-63]
	_ = x[ErrNoSuchKey-64]
	_ = x[ErrNoSuchUpload-65]
	_ = x[ErrInvalidVersionID-66]
	_ = x[ErrNoSuchVersion-67]
	_ = x[ErrNotImplemented-68]
	_ = x[ErrPreconditionFailed-69]
	_ = x[ErrRequestTimeTooSkewed-70]
	_ = x[ErrSignatureDoesNotMatch-71]

				"GNU.sparse.numblocks": "95",