Datasheet

Data Sheet
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High Availability
High availability on the Cisco MCS 7845-I2 is achieved through the following mechanisms:
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Redundant hot-swap 835W power supplies
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Hot-swap SAS hard drives configured using Redundant Array of Independent Disks (RAID)
1
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Redundant hot-swap fans
Memory
The Cisco MCS 7845-I2 supports up to 48 GB of double-data-rate 2 (DDR2) memory. The
increased processor performance coupled with DDR memory allows you to retrieve and process
information fast and efficiently. DDR memory executes twice the number of operations per cycle
than traditional synchronous dynamic RAM (SDRAM) memory, effectively doubling the data
exchange rate between memory and processors.
Variable-Speed Fan Support
The Cisco MCS 7845-I2 includes variable-speed fans to reduce operating noise. Through the use
of temperature sensors within the server, the speed of the fans is adjusted to maintain the proper
cooling, reducing the noise generated by the fans by operating them only when required and at a
speed based upon the cooling requirements.
Advanced Connectivity Technology
The Cisco MCS 7845-I2 supports IBM’s new NetBAY Advanced Connectivity Technology products
that help reduce Keyboard/Video/Mouse (KVM) costs by linking administrators’ chain systems
together with Category 5 cable. In addition to reducing overall costs, Advanced Connectivity
Technology reduces bulk cable clutter, making servers accessible and serviceable in the rack.
Serviceability
Light Path Diagnostics
The Cisco MCS 7845-I2 is equipped with Light Path Diagnostics, which provides a central
information LED panel (visible without removing the cover) and individual LED lights throughout
the system on items such as memory dual in-line memory modules (DIMMs), Peripheral
Component Interconnect (PCI) slots, power supplies, and CPUs. IT can quickly view system
status, and service personnel can pinpoint a specific failing component, helping reduce downtime
and service costs. This capability provides increased availability, because nontechnical personnel
can report error conditions without removing the top cover and exposing vital components to
further risk. If the system error LED on the front of the server is on, one or more LEDs inside the
server or on the power supply will be on. These LEDs will help identify and locate problems with
some server components. By following the path of lights, you can quickly identify the type of
system error that occurred. The Cisco MCS 7845-I2 is designed so that any LEDs that are
illuminated remain illuminated when the server shuts down as long as the AC power source is
good and the power supply can provide +5 VDC to the server.
Light Path Diagnostics provide indication of failures for the following conditions:
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One or both power supplies consuming power higher than maximum rating
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Power supply 1 failure
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Power supply 2 failure