How To Access Lost Partition

From: PC-Student (cedric_at_hawaii.rr.com)
Date: 04/30/04 

Date: Thu, 29 Apr 2004 23:06:03 -0700

I have an external 120G drive that I partitioned into two pieces 20G and 100G. I could access both partitions fine but something must have happened because now I can still access the 20G partition but I cannot access the 100G partition and I have all my music files on it. The 100G drive no longer appears in Windows Explorer. How can I gain access to the 100G partition? Thank you.