The exchange log filesystems sometimes become full, usually as a result of a failure of the backup job to clear old log files. This will result in dependent databases being taken offline. There are two solutions to this –
- Ask someone from the SAN team to extend the LUN that hosts the log files and then grow the volume on the Windows system. You should only do this if you want a permanent increase in the log filesystem size.
- Remove some of the log files to clear some space. Follow the advice at http://support.microsoft.com/kb/240145