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Revised: September 28, 2016, OL-22475-01
Cisco UCS B420 M3 High Performance Blade Server
This document describes how to install and service the Cisco UCS B420 M3 High Performance Blade Server, a full-width blade
server meaning up to four of these high-density, four-socket blade servers can reside in a Cisco UCS 5108 Blade Server chassis.
The B420 M3 Blade Server has the following features:
• Up to four Intel Xeon processor E5-4600 processor family CPUs, with up to 32 cores per server
• 48 DIMM slots for registered ECC DIMMs, with up to 1.5-TB memory capacity (using 32-GB LRDIMMs)
• 3 adapter connectors for up to 160-Gb/s bandwidth:
◦ One dedicated connector for the Cisco VIC 1240 modular LAN-on-motherboard (mLOM)
◦ Two connectors for Cisco the VIC 1280, VIC Port Expander, or third-party network adapter cards
• Four hot-plug drive bays that support SAS or SATA SSD drives
• LSI 2208R controller that provides RAID 0, 1, 5, and 10 with an optional 1-GB flash-backed write cache
Figure 1: B420 M3 Blade Server Front Panel
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Drive bay 1
Drive bay 2
2
Drive bay 3
3
4
Drive bay 4
5
Left ejector handle
6
Asset Tag
Each server has a blank plastic tag that pulls out of
the front panel so you can add your own asset
tracking label without interfering with the intended
air flow.
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Right ejector handle
2
8
Power button and LED
Network link status LED
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Blade health LED
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Local console connection
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Reset button access
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Beaconing button and LED