HP NetServer AA 4000 Using page 2

simple deployment
and lower costs
how do we do it?
The HP Netserver AA Solutions are especially important to companies with mission critical
processing environments where continuous data access is required. Reduced downtime
means higher availability and greater productivity. With architecture that can withstand
multiple failures without an end-user service interruption, HP Netserver AA Solutions offer
the highest level of availability possible—along with greater peace of mind. The solution
is engineered to run in a standard Windows NT or Windows 2000 environment, for
simplified deployment with a lower total cost of ownership.
HP Netserver AA Solutions leverage previous investments in servers, software, and
training while maximizing system uptime and protecting critical data from catastrophic
loss or corruption. In addition, they make it possible to attain a lower total cost of
ownership—for the data center, for disaster recovery scenarios, or for large numbers of
branch offices—by consolidating users, systems storage, management, and backup.
Finally, their ability to run standard applications means that no expensive programming
modifications are needed. No matter what the industry—financial services, banking, or
healthcare—when downtime is not an option, the HP Netserver AA Solution is the one to
count on to protect your business.
Because HP Netserver AA Solutions use general-purpose servers, standard Windows NT
or Windows 2000 Server software, and unmodified applications, the technology is easily
integrated into mainstream computing environments.
The logical server is created out of an array of four separate servers. Computing
processing is separated from input/output processing, and the array runs simultaneously
on two symmetrical halves (tuples) to ensure that there is no single point of failure. The
I/O processors run asynchronously while the compute elements run synchronously in
lockstep (see Figure 1).
figure 1. the hp netserver aa solution
With the HP Netserver AA 6200 Solution, this pairing of servers—called a tuple—can
be located up to 500 meters apart, providing disaster tolerance to keep operations
running even during a fire or other calamity. This unique tuple arrangement provides the
highest level of availability for a platform running Intel
Windows 2000 environment and establishes a solid strategy to cope with both planned
(for maintenance or backup) and unplanned downtime.
® processors in a Windows NT or