Add second drive

I have installed Redhat 6.2 on a 486 that has two hard-drives during the install I could only get one drive formated(My mistake)I now have used a Dos version og partition magic and found that the second drive was not formated. On the second drive Ideleted the partition then created a linux extended partion on it. How do I get the system to reconize and use the second drive. In linuxconf I don’t even see it. On the first drive I set the mount point to \ .