RAID 5 Performance

I have a server running W2K Server with 4 HDDs configured in a hardware RAID 5. One of my drives failed and I am currently running on 3 drives. This server has a SQL 2000 database on it. I am not going to be able to replace the HDD for 2 or 3 days. Can I expect much of a performance issue or slow downs running the server this way? Thanks