8 Netra T2000 Server Installation Guide • September 2006
System Reliability, Availability, and
Serviceability
Reliability, availability, and serviceability (RAS) are aspects of a server’s design that
affect its ability to operate continuously and to minimize the time necessary to
service the server.
■ Reliability – a server’s ability to operate continuously without failures and to
maintain data integrity.
■ Availability – the ability of a server to recover to an operational state after a
failure, with minimal impact.
■ Serviceability – the time it takes to restore a server to service following a system
failure.
Together, reliability, availability, and serviceability features provide for near
continuous server operation.
To deliver high levels of reliability, availability, and serviceability, the server offers
the following features:
■ Hot-swappable hard drives
■ Redundant, hot-swappable power supplies (two)
■ Redundant fan units (three) for processor, memory, and PCI card cooling, and
redundant fan units (two) for HD and DVD drives
■ Environmental monitoring
■ Error detection and correction for improved data integrity
■ Easy access for most component replacements
For more information about using RAS features, refer to the server administration
guide.
Hot-Swappable Components
The server hardware supports hot-swapping of the chassis-mounted hard drives and
power supplies. By using the proper software commands, you can install or remove
these components while the server is running. Hot-swap technology significantly
increases the server’s serviceability and availability by providing the ability to
replace hard drives and power supplies without service disruption.
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