Our site runs Oracle 8.1.7.0.0. for DR we have implemented standby server with the production box forced to make 5 mins log file switches to ensure the maximum data loss would be 5 mins in the event of a failure, possibly the log being transferred. This is now unacceptable and 5 mins loss is no good, They do not want to buy Parrallel Server which is clearly what is required. What are my other options for effectively hot standby can I use Oracle Dataguard?

Thanks in advance