??? Media: Understanding different RAID levels is critical to ensuring that your data is
protected in the manner it requires.
??? Process: Hardware environments present their own types of process errors. You, as
the DBA of a critical system, should be notified if there are changes to the hardware
environment. For example, you need to know if someone is upgrading a DNS
server, potentially making your SQL Server unavailable to users.
??? User: Hardware specialists (just like DBAs) can make mistakes. Don??™t be surprised if
you??™re faced with a hardware-related user error (e.g., if someone accidentally shuts
down the wrong server in the data center).
Caveats and Recommendations
If I could give only one recommendation, it would simply be, ???know thy hardware.??? The
less you understand about your hardware environment, the more you??™re at the mercy (or
will) of the hardware experts around you. Perhaps I??™m a bit on the paranoid side, but I
would rather have a basic understanding of as many technologies as possible than rely
on faith that others will do what is necessary to protect and preserve the data for which
I??™m responsible.
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