I have an Exchange 2007 server with local continuous replication enabled. Transaction logs and passive copy of database were saved to a separate drive from the active db. Long story short the secondary drive failed. I had just made an Exchange aware backup overnight, so was able to recover and everything working. Question: MS recommends to keep log files on separate drive from the main db, also recommends to keep passive copy of the db on separate drive. What is the best configuration and backup practices to run to avoid disaster? Should I install 3 drives, one for main db, one for replication db, and one for logs? Any help would be appreciated.