We have an Exchange 2003 server with a drive that has started going bad. The event log shows I/O errors and that the drive has a bad block. All the information stores on that drive mount but one. The log files for all Information stores are also on this drive. We have moved some of the log files off to another drive without incident it is just this one store that won,t mount. One other symptom is that when we attempt to mount that store it takes the whole storage group offline.