Check the contents of the log file regularly, as its contents are a good indication of the health of the machine.
Look for the following types of problems that can indicate, or can lead to, database corruption:
Timeouts
System panics
Memory problems of any kind
When investigating an Adaptive Server error which may be hardware-related, look for messages in the OS error log with date/time about the same as the initial occurrence of the Adaptive Server error.
For more information about the OS log file consult your operating system documentation.