Rorke Data Galaxy Aurora Series Configuration And System Integration Manual page 115

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– just as delicate as the SATA connectors on the motherboard. It is really easy
to snap off the plastic tab in the middle of the connector on the motherboard,
so care must be taken when inserting or removing devices.
PS/2: While this is considered a legacy port, most motherboards still come
with these connectors. They are very high-priority, in terms of interrupt, and
are controlled (usually) by an Intel i8042 chip located somewhere on the
motherboard. If this chip fails, both ports will go out.
CMOS/BIOS: If the BIOS dies, the motherboard is useless. However, if
something is set incorrectly in the BIOS, it may prevent the array from
operating properly. Motherboards with on-board RAID controllers may also
have additional BIOSes for those – even a bootable Ethernet port might have
it's own BIOS.
114 Section 4 Troubleshooting Guide