# File lib/innodb/log_reader.rb, line 18
  def seek(lsn_no)
    check_lsn_no(lsn_no)
    @context.buffer = String.new
    @context.buffer_lsn.reposition(lsn_no, @group)
    @context.record_lsn = @context.buffer_lsn.dup
    self
  end