Cisco UCS B420 M4 User manual

CISCO SYSTEMS PUBLICATION HISTORY
170 WEST TASMAN DR.
SAN JOSE, CA, 95134 REV B.3 OCTOBER 17, 2016
WWW.CISCO.COM
Cisco UCS B420 M4
Blade Server

Cisco UCS B420 M4 Blade Server
2
CONTENTS
OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
DETAILED VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Blade Server Front View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
BASE SERVER STANDARD CAPABILITIES and FEATURES . . . . . . . . . . . . . . . . . 5
CONFIGURING the SERVER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
STEP 1 VERIFY SERVER SKU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
STEP 2 CHOOSE CPU(S) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
STEP 3 CHOOSE MEMORY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
STEP 4 CHOOSE RAID CONTROLLER AND DISK DRIVE BAYS . . . . . . . . . . . . . . . . . . . . . . . 16
STEP 5 CHOOSE HARD DISK DRIVES or SOLID-STATE DRIVES (OPTIONAL) . . . . . . . . . . . . . . 19
STEP 6 CHOOSE ADAPTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
STEP 7 ORDER A TRUSTED PLATFORM MODULE (OPTIONAL) . . . . . . . . . . . . . . . . . . . . . . 25
STEP 8 ORDER CISCO FLEXIBLE FLASH SECURE DIGITAL CARDS . . . . . . . . . . . . . . . . . . . . 26
STEP 9 ORDER INTERNAL USB 3.0 DRIVE (OPTIONAL) . . . . . . . . . . . . . . . . . . . . . . . . . . 27
STEP 10 CHOOSE OPERATING SYSTEM AND VALUE-ADDED SOFTWARE . . . . . . . . . . . . . . . 28
STEP 11 CHOOSE OPERATING SYSTEM MEDIA KIT (OPTIONAL) . . . . . . . . . . . . . . . . . . . . 31
STEP 12 CHOOSE SERVICE and SUPPORT LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
STEP 13 CHOOSE LOCAL KVM I/O CABLE* (OPTIONAL) . . . . . . . . . . . . . . . . . . . . . . . . . 37
SUPPLEMENTAL MATERIAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
System Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
DIMM and CPU Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
DIMM Population Order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Network Connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
VIC 1340/1240 and Port Expander . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Connectivity Using the Cisco UCS 2304 Fabric Extender . . . . . . . . . . . . . . . . . . . . . . 48
Connectivity Using the Cisco UCS 2208XP Fabric Extender . . . . . . . . . . . . . . . . . . . . 54
Connectivity using the Cisco UCS 2204XP Fabric Extender . . . . . . . . . . . . . . . . . . . . 59
TECHNICAL SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Dimensions and Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Power Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Cisco UCS B420 M4 Blade Server
OVERVIEW
3
OVERVIEW
Designed for demanding virtualization and database workloads, the UCS B420 M4 combines a large memory
footprint with four-socket scalability, leveraging the Intel® Xeon® processor E5-4600 v3 and v4 product
family. The UCS B420 M4 supports 2133-MHz and 2400-MHz DDR4 memory and utilizes UCS Virtual Interface
Card (VIC) technology to achieve up to 160 Gb aggregate I/O bandwidth, all in a dense, full-width blade
form factor. The UCS B420 M4 maintains memory performance even as capacity grows, and the large power
envelope of the UCS 5108 Blade Server Chassis means the UCS B420 can handle up to 3 TB of memory
without compromise to CPU speed or core count. Up to four UCS B420 M4 Blade Servers can be installed in
the UCS 5108 Blade Server Chassis.
The UCS B420 M4 Blade Server is centrally managed using Cisco UCS Manager. Cisco UCSM provides a single
management interface for all hardware and software components of a UCS domain. Cisco UCSM manages up
to 160 servers, using Single Connect Technology to consolidate network, storage, and management traffic.
With Cisco UCS Central, management can be extended globally to thousands of servers in multiple domains.
Figure 1 Cisco UCS B420 M4 Blade Server

Cisco UCS B420 M4 Blade Server
4
DETAILED VIEWS
DETAILED VIEWS
Blade Server Front View
Figure 2 is a detailed front view of the Cisco UCS B420 M4 Blade Server.
Figure 2 Blade Server Front View
1Drive bay 1 8Power button and LED
2Drive bay 2 9Network link status button
3Drive bay 3 10 Blade health LED
4Drive bay 4 11 Local console connector1
Notes
1. For information about the KVM local I/O cable that plugs into the console connector (a cable is included with
every Cisco UCS 5100 Series blade server chassis accessory kit), see CHOOSE LOCAL KVM I/O CABLE*
(OPTIONAL) on page 37.
5Left blade ejector handle 12 Reset button access
6Asset pull handle
(a blank asset tag is provided on which
you can add your own label or sticker or
you can use a marker to write your asset
information on the tag)
13 Beaconing LED and button
7Right blade ejector handle 14 Ejector thumbscrew
305013
1
5 7 8 1310 11
912
14 14
6
2 3 4

Cisco UCS B420 M4 Blade Server
BASE SERVER STANDARD CAPABILITIES and FEATURES
5
BASE SERVER STANDARD CAPABILITIES and FEATURES
Table 1 lists the capabilities and features of the base server. Details about how to configure the server for
a particular feature or capability (for example, number of processors, disk drives, or amount of memory)
are provided in CONFIGURING the SERVER on page 7.
NOTE: The B420 M4 blade server requires UCS Manager (UCSM) to operate as part of
the UCS system.
■The B420 M4 with E5-4600 v3 or v4 CPUs requires UCSM 2.2(5a) or later
Table 1 Capabilities and Features
Capability/Feature Description
Blade server chassis The full-width UCS B420 M4 Blade Server mounts in a Cisco UCS 5100 series
blade server chassis
CPU Up to four Intel® E5-4600 v3 or v4 series processor family CPUs.
2- and 4-CPU configurations are supported on the UCS B420 M4.
Chipset Intel® C610 chipset
Memory 48 total slots for registered ECC DIMMs
I/O Three configurable adapter slots:
■One slot supports the Cisco VIC 1340/1240 adapter only.
■Two additional slots support Cisco adapters and Cisco UCS Storage
Accelerator adapters.
Storage controller ■Diskless system (no drive bays or RAID controller), or
■Optional Cisco FlexStorage 12G SAS RAID controller options, offering:
• SAS/SATA/HDD/SSD support
• RAID support: 0, 1, 10 or
• RAID 0, 1, 10, 5, 6 with optional 2 GB flash-backed write cache
Storage devices Either two or four hot-plug 2.5” SFF drive bays
One internal USB 3.0 port
Two Cisco Flexible Flash secure digital card slots
Interfaces Front panel
■One console connector
(see CHOOSE LOCAL KVM I/O CABLE* (OPTIONAL) on page 37)

Cisco UCS B420 M4 Blade Server
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BASE SERVER STANDARD CAPABILITIES and FEATURES
Video The Cisco Integrated Management Controller (CIMC) provides video using the
Matrox G200e video/graphics controller:
■Integrated 2D graphics core with hardware acceleration
■DDR2/3 memory interface supports up to 512 MB of addressable memory
(8 MB is allocated by default to video memory)
■Supports display resolutions up to 1920 x 1200 16bpp @ 60Hz
■High-speed integrated 24-bit RAMDAC
■Single lane PCI-Express host interface running at Gen 1 speed
Power subsystem Integrated in the Cisco UCS 5100 series blade server chassis
Fans Integrated in the Cisco UCS 5100 series blade server chassis
Integrated management
processor
The built-in Cisco Integrated Management Controller (CIMC) GUI or CLI
interface enables you to monitor the server inventory, health, and system
event logs.
Cisco UCS Diagnostics
for Cisco UCS B-Series
Blade Servers
The Cisco UCS Blade Server Diagnostics tool for Cisco UCS Blade Servers
enables you to verify the health of the hardware components on your
servers. The diagnostics tool provides a variety of tests to exercise and
stress the various hardware subsystems on the Cisco UCS Blade Servers, such
as memory and CPU. You can use the tool to run a sanity check on the state
of your Cisco UCS Blade Servers after you fix or replace a hardware
component. You can also use this tool to run comprehensive burn-in tests
before you deploy a new Cisco UCS Blade Server in your production
environment.
See the following links for more information:
User Guide:
http://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/sw/ucs_di
agnostics/b_UCS_Blade_Server_Diagnostics_User_Guide.html
ISO Download:
http://www.cisco.com/cisco/software/navigator.html
Table 1 Capabilities and Features (continued)
Capability/Feature Description

Cisco UCS B420 M4 Blade Server
CONFIGURING the SERVER
7
CONFIGURING the SERVER
Follow these steps to configure the Cisco UCS B420 M4 Blade Server:
■STEP 1 VERIFY SERVER SKU, page 8
■STEP 2 CHOOSE CPU(S), page 9
■STEP 3 CHOOSE MEMORY, page 11
■STEP 5 CHOOSE HARD DISK DRIVES or SOLID-STATE DRIVES (OPTIONAL), page 19
■STEP 6 CHOOSE ADAPTERS, page 21
■STEP 7 ORDER A TRUSTED PLATFORM MODULE (OPTIONAL), page 25
■STEP 8 ORDER CISCO FLEXIBLE FLASH SECURE DIGITAL CARDS, page 26
■STEP 9 ORDER INTERNAL USB 3.0 DRIVE (OPTIONAL), page 27
■STEP 10 CHOOSE OPERATING SYSTEM AND VALUE-ADDED SOFTWARE, page 28
■STEP 11 CHOOSE OPERATING SYSTEM MEDIA KIT (OPTIONAL), page 31
■STEP 12 CHOOSE SERVICE and SUPPORT LEVEL, page 32
■STEP 13 CHOOSE LOCAL KVM I/O CABLE* (OPTIONAL), page 37

Cisco UCS B420 M4 Blade Server
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CONFIGURING the SERVER
STEP 1 VERIFY SERVER SKU
Verify the product ID (PID) of the server as shown in Table 2.
The base Cisco UCS B420 M4 blade server does not include the following components. They must
be selected during product ordering:
■CPUs
■Memory
■Disk drives
■Cisco adapters (such as the VIC 1340, VIC 1240, VIC 1380, VIC 1280, and Port Expander)
■Cisco UCS Storage Accelerators
Table 2 PID of the Base UCS B420 M4 Blade Server
Product ID (PID) Description
UCSB-B420-M4 UCS B420 M4 Blade Server with no CPU, memory, HDD, SSD, or adapter cards
NOTE: Use the steps on the following pages to order servers with the
configurable components that you want configured in your servers.

Cisco UCS B420 M4 Blade Server
CONFIGURING the SERVER
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STEP 2 CHOOSE CPU(S)
The standard CPU features are:
■Intel Xeon processor E5-4600 v3 or v4 series processor family CPUs
■Core counts of up to 18 for v3 CPUs and 22 for v4 CPUs
■Cache sizes of up to 45 MB for v3 CPUs and 55 MB for v4 CPUs
Select CPUs
The supported Intel Xeon E5-4600 v3 and v4 series CPUs on the UCS B420 M4 are listed in
Table 3.
Table 3 Supported Intel CPUs: E5-4600 v3 and v4 Series Processor Family CPUs
Product ID (PID) Intel
Number
Clock
Freq
(GHz)
Power
(W) Cache Size (MB) Cores QPI Highest DDR4 DIMM Clock Support (MHz)
Intel Xeon E5-4600 v4
UCS-CPU-E5-4669E E5-4669 v4 2.20 135 55 22 9.6 2400
UCS-CPU-E5-4667E E5-4667 v4 2.20 135 45 18 9.6 2400
UCS-CPU-E5-4660E E5-4660 V4 2.2 120 40 16 9.6 2400
UCS-CPU-E5-4650E E5-4650 V4 2.2 105 35 14 9.6 2400
UCS-CPU-E5-4655E E5-4655 V4 2.5 135 30 8 9.6 2400
UCS-CPU-E5-4640E E5-4640 V4 2.1 105 30 12 8.0 2133
UCS-CPU-E5-4627E1
Notes
1. The UCS-CPU-E5-4627E CPU does not support Hyper-Threading technology.
E5-4627 V4 2.6 135 25 10 8.0 2400
UCS-CPU-E5-4620E E5-4620 V4 2.1 105 25 10 8.0 2133
UCS-CPU-E5-4610E E5-4610 V4 1.8 105 25 10 6.4 1866
Intel Xeon E5-4600 v3
UCS-CPU-E5-4669D E5-4669 v3 2.10 135 45 18 9.6 2133
UCS-CPU-E5-4667D E5-4667 v3 2.00 135 40 16 9.6 2133
UCS-CPU-E5-4660D E5-4660 v3 2.10 120 35 14 9.6 2133
UCS-CPU-E5-4655D E5-4655 v3 2.90 135 30 6 9.6 2133
UCS-CPU-E5-4650D E5-4650 v3 2.10 105 30 12 9.6 2133
UCS-CPU-E5-4640D E5-4640 v3 1.90 105 30 12 8.0 1866
UCS-CPU-E5-4627D2
2. The UCS-CPU-E5-4627D CPU does not support Hyper-Threading technology.
E5-4627 v3 2.60 135 25 10 8.0 2133
UCS-CPU-E5-4620D E5-4620 v3 2.00 105 25 10 8.0 1866
UCS-CPU-E5-4610D E5-4610 v3 1.70 105 25 10 6.4 1600

Cisco UCS B420 M4 Blade Server
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CONFIGURING the SERVER
Supported Configurations
(1) Two-CPU Configuration
■Choose two identical CPUs from any one of the rows of Table 3. CPUs 1 and 2 will be
populated.
(2) Four-CPU Configuration
■Choose four identical CPUs from any one of the rows of Table 3.
Notes
■The system will run at the lowest CPU or DIMM clock speed.
■System speed is also dependent on how many DIMMs are populated per channel.
■For 2-CPU systems, only 24 DIMM slots are functional (channels A - H).
■See Table 12 on page 23 for supported adapter combinations in 2-CPU systems.
■For 4-CPU systems, all 48 DIMM slots are functional.

Cisco UCS B420 M4 Blade Server
CONFIGURING the SERVER
11
STEP 3 CHOOSE MEMORY
The standard memory features are:
■DIMMs
— DDR4 ECC registered DIMMs (RDIMMs), through silicon via RDIMMs (TSV-RDIMMs), or
load-reduced DIMMs (LRDIMMs)
— Clock speed: 2133 MHz or 2400 MHz
— Ranks per DIMM: up to 8
— Operational voltage: 1.2 V
■Memory is organized with four memory channels per CPU, with up to three DIMMs per
channel (DPC), as shown in Figure 3.
Figure 3 UCS B420 M4 Memory Organization
CPU 1 CPU 2
48 DIMMS
4 memory channels per CPU
3 DIMMs per channel
CPU 3 CPU 4
Channel A
Channel B
Channel C
Channel D
Channel E
Channel F
Channel G
Channel H
Channel M
Channel N
Channel O
Channel P
Channel I
Channel J
Channel K
Channel L
A1A2A3
B3
C3
D3
I3
J3
K3
I3
M3
N3
O3
P3
E3
F3
G3
H3
B1B2
C1C2
D1D2
Bank 1 Bank 2 Bank 3
E1 E2
F1 F2
G1 G2
H1 H2
Bank 1 Bank 2 Bank 3
Bank 1 Bank 2 Bank 3
M1 M2
N1 N2
O1 O2
P1 P2
I1I2
J1J2
K1K2
I1I2
Bank 1 Bank 2 Bank 3

Cisco UCS B420 M4 Blade Server
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CONFIGURING the SERVER
Choose DIMMs and Memory Mirroring
Select the memory configuration and whether or not you want the memory mirroring option.
The supported memory DIMMs and the mirroring option are listed in Table 4.
When memory mirroring is enabled, the memory subsystem simultaneously writes identical data
to two adjacent channels. If a memory read from one of the channels returns incorrect data due
to an uncorrectable memory error, the system automatically retrieves the data from the other
channel. A transient or soft error in one channel does not affect the mirrored data, and
operation continues unless there is a simultaneous error in exactly the same location on a DIMM
and its mirrored DIMM. Memory mirroring reduces the amount of memory available to the
operating system by 50% because only one of the two populated channels provides data.
Notes
■DIMM configuration rules:
— The minimum configuration is 1 DIMM per CPU
— The order in which DIMMs must be installed in a channel is Bank 1 (blue socket),
then Bank 2 (black socket), then Bank 3 (white socket).
— You cannot mix DIMM capacities within a bank
— You can mix DIMM capacities within a channel
Table 4 Supported DDR4 DIMMs and Memory Mirroring Option
Product ID (PID) PID Description Voltage Ranks
/DIMM
2400-MHz DIMM Options
UCS-ML-1X644RV-A 64 GB DDR4-2400-MHz LRDIMM/PC4-19200 x4 1.2 V 4
UCS-ML-1X324RV-A 32GB DDR4-2400-MHz LRDIMM/PC4-19200 x4 1.2 V 4
UCS-MR-1X322RV-A 32GB DDR4-2400-MHz RDIMM/PC4-19200 x4 1.2 V 2
UCS-MR-1X161RV-A 16GB DDR4-2400-MHz RDIMM/PC4-19200 x4 1.2 V 1
2133-MHz DIMM Options
UCS-MR-1X648RU-A 64GB DDR4-2133-MHz TSV-RDIMM/PC4-17000/x4 1.2 V 8
UCS-MR-1X322RU-A 32GB DDR4-2133-MHz RDIMM/PC4-17000/x4 1.2 V 2
UCS-MR-1X162RU-A 16GB DDR4-2133-MHz RDIMM/PC4-17000/x4 1.2 V 2
UCS-MR-1X081RU-A 8GB DDR4-2133-MHz RDIMM/PC4-17000/x4 1.2 V 1
Memory Mirroring Option
N01-MMIRROR Memory mirroring option

Cisco UCS B420 M4 Blade Server
CONFIGURING the SERVER
13
— 64GB TSV-RDIMMs cannot be mixed with any other DIMMs
— You cannot mix RDIMMs with LRDIMMs
■To optimize memory performance:
— Configure DIMMs identically for each CPU
— Fill banks equally across the CPU. See DIMM population guidelines in Table 27 on
page 41, Table 28 on page 42, and Table 29 on page 42.
—Populatelessthan3DPC
■For systems shipping with E5-4600 v3 series processor family CPUs, DIMM speeds are as
shown in Table 5, Table 6, and Table 7.
Table 5 DIMM Speeds for 2133-MHz E5-4600 v3 Series CPUs
DPC DIMM Type
64 GB (TSV) 16/32 GB (DR) 8 GB (SR)
1DPC 2133 2133 2133
2DPC 2133 2133 2133
3 DPC 1600 1866 1600
Table 6 DIMM Speeds for 1866-MHz E5-4600 v3 Series CPUs
DPC DIMM Type
64 GB (TSV) 16/32 GB (DR) 8 GB (SR)
1DPC 1866 1866 1866
2DPC 1866 1866 1866
3 DPC 1333 1600 1333
Table 7 DIMM Speeds for 1600-MHz E5-4600 v3 Series CPUs
DPC DIMM Type
64 GB (TSV) 16/32 GB (DR) 8 GB (SR)
1DPC 1600 1600 1600
2DPC 1600 1600 1600

Cisco UCS B420 M4 Blade Server
14
CONFIGURING the SERVER
For systems shipping with E5-4600 v4 series processor family CPUs, DIMM speeds are as shown in Table 8.
3 DPC 1066 1333 1066
Table 8 DIMM Speeds for E5-4600 v4 Series CPUs
DIMM and CPU
Frequencies
DIMMs per
Channel
LRDIMM speed
(quad rank x4)
64 GB 1.2 V
RDIMM speed
(dual rank x4)
32 GB 1.2 V
LRDIMM speed
(quad rank x4)
32 GB 1.2 V
LRDIMM speed
(single rank x4)
16 GB 1.2 V
DIMM FREQ - 2400
CPU FREQ - 2400
1 DPC 2400 2400 2400 2400
2 DPC 2400 2400 2400 2400
3 DPC 2133 1866 2133 2133
DIMM FREQ - 2133
CPU FREQ - 2400
1 DPC NA 2133 2133 2133
2 DPC NA 2133 2133 2133
3 DPC NA 1866 1866 1866
DIMM FREQ - 2400
CPU FREQ - 2133
1 DPC 2133 2133 2133 2133
2 DPC 2133 2133 2133 2133
3 DPC 1866 1866 1866 1866
DIMM FREQ - 2133
CPU FREQ - 2133
1 DPC NA 2133 2133 2133
2 DPC NA 2133 2133 2133
3 DPC NA 1866 1866 1866
DIMM FREQ - 2400
CPU FREQ - 1866
1 DPC 1866 1866 1866 1866
2 DPC 1866 1866 1866 1866
3 DPC 1866 1600 1866 1600
Table 7 DIMM Speeds for 1600-MHz E5-4600 v3 Series CPUs (continued)

Cisco UCS B420 M4 Blade Server
CONFIGURING the SERVER
15
For more information regarding memory, see DIMM and CPU Layout on page 40.
Supported Configurations
(1) Without memory mirroring:
■Select from 1 to 12 DIMMs per CPU (note that there are 12 DIMM slots per CPU). There must
be at least 1 DIMM per CPU.
(2) With memory mirroring:
■Select 4 DIMMs per CPU (installed in bank 1), 8 DIMMs per CPU (installed in banks 1, 2), or 12
DIMMs per CPU (installed in banks 1, 2, 3).
DIMM and CPU
Frequencies
DIMMs per
Channel
LRDIMM speed
(quad rank x4)
64 GB 1.2 V
RDIMM speed
(dual rank x4)
32 GB 1.2 V
LRDIMM speed
(quad rank x4)
32 GB 1.2 V
LRDIMM speed
(single rank x4)
16 GB 1.2 V
DIMM FREQ - 2133
CPU FREQ - 1866
1 DPC NA 1866 1866 1866
2 DPC NA 1866 1866 1866
3 DPC NA 1600 1866 1600
Table 8 DIMM Speeds for E5-4600 v4 Series CPUs (continued)

Cisco UCS B420 M4 Blade Server
16
CONFIGURING the SERVER
STEP 4 CHOOSE RAID CONTROLLER AND DISK DRIVE BAYS
The UCS B420 M4 can be ordered with or without the Cisco FlexStorage RAID controller with disk
drive bays (local storage subsystem).
There is no RAID or local storage controller or drive bays included (embedded) with the B420 M4
server. Therefore, the Cisco FlexStorage RAID controller with drive bays must be purchased in
order to support any (1, 2, 3, or 4) local hard disk drives (HDDs) or solid state drives (SSDs). The
Cisco FlexStorage RAID controller option includes drive bays one and two, and supports RAID
0,1,10. An optional passthrough module includes drive bays three and four.
For servers that do not need any local HDDs or SSDs (for example, for booting from SAN), you can
order the server without the Cisco FlexStorage RAID controller with disk drive bays; however be
sure to keep Cisco FlexStorage blanking panels installed to maintain proper cooling airflow.
The ordering information is listed in Table 11.
See Figure 4 on page 17 for a top view of the B420 M4 server with and without the Cisco
FlexStorage SAS RAID controller and drive bays. See Figure 5 on page 17 for a front view of
these configurations. When no drive bays are installed, blanking panels must be installed.
Table 9 Card Cage and RAID Ordering Options
Product ID (PID) PID Description
UCSB-MRAID12G1
Notes
1. The UCSB-MRAID-12G RAID controller runs iMegaRAID, which has a lower-capability software stack, provides
RAID 0/1 levels, and has no support for caching. Note that you cannot upgrade from this RAID controller to the
to UCSB-MRAID12G-HE RAID controller.
Cisco FlexStorage 12G SAS RAID controller with drive bays
UCSB-MRAID12G-HE2, 3, 4
2. The UCSB-MRAID12G-HE RAID controller runs a MegaRAID fully-featured software stack, has access to cache,
and is recommended for VSAN. Its queue depth is much higher than that of the UCSB-MRAID-12G. Supports RAID
0/1/5/6 levels. Note that you cannot upgrade to this RAID controller from the UCSB-MRAID-12G controller
3. The B420 M4 with the UCSB-MRAID12G-HE requires UCSM 2.2(6) or later
4. The flash-backed write cache provides RAID controller cache protection using NAND flash memory and a
supercapacitor. In the event of a power or server failure, cached data is automatically transferred from the
RAID controller DRAM write cache to flash. Once power is restored, the data in the NAND flash is copied back
into the DRAM write cache until it can be flushed to the disk drives.
Cisco FlexStorage 12G SAS RAID controller with 2 GB flash-backed write
cache and drive bays
UCSB-LSTOR-PT Passthrough module with drive bays
UCSB-LSTOR-BK Cisco FlexStorage blanking panel w/o controller, w/o drive bays

Cisco UCS B420 M4 Blade Server
CONFIGURING the SERVER
17
Figure 4 UCS B420 M4 With and Without Drive Bays (Top View)
Figure 5 UCS B420 M4 With and Without Drive Bays (Front View)
RAID
Controller
(integrated
in drive bay)
Disk Drive
Bays (4)
(a) Server with four drive bays (b) Server with no drive bays
Blanking Panels
(a) Server with four drive bays (b) Server with no drive bays
Blanking Panels
Blanking Panel

Cisco UCS B420 M4 Blade Server
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CONFIGURING the SERVER
Supported Configurations1
(1) Four Drive Bays with RAID 0, 1, 10
■Choose the following:
— One UCSB-MRAID12G. This provides two drive bays installed on the left side of the
blade server (viewed from the front). The RAID controller is integrated in the drive
bays and provides RAID 0,1,10.
— One UCSB-LSTOR-PT. This provides two drive bays installed on the right side of the
blade server (viewed from the front) and includes a passthrough connector that
allows the drives to be managed from the UCSB-MRAID12G RAID controller (RAID
0,1,10).
(2) Four Drive Bays with RAID 0, 1, 10, 5, 6
■Choose the following:
— One UCSB-MRAID12G-HE. This provides two drive bays installed on the left side of
the blade server (viewed from the front). The RAID controller includes a 2 GB
flash-backed write cache (FBWC)2for higher performance, is integrated in the drive
bays, and provides RAID 0, 1,10, 5, 6, 50, 60.
— One UCSB-LSTOR-PT. This provides two drive bays installed on the right side of the
blade server (viewed from the front) and includes a passthrough connector that
allows the drives to be managed from the UCSB-MRAID12G-HE RAID controller (RAID
0, 1,10, 5, 6).
(3) Two Drive Bays with RAID 0, 1, 10
■Choose the following:
— One UCSB-MRAID12G. This provides two drive bays installed on the left side of the
blade server (viewed from the front). The RAID controller is integrated in the drive
bays and provides RAID 0,1,10. The two right-hand bays are fitted with blanking
panels to maintain proper cooling airflow.
(4) Two Drive Bays with RAID 0, 1, 10, 5, 6
■Choose the following:
— One UCSB-MRAID12G-HE. This provides two drive bays installed on the left side of
the blade server (viewed from the front). The RAID controller includes a 2 GB
flash-backed write cache for higher performance, is integrated in the drive bays and
provides RAID 0, 1,10, 5, 6. The two right-hand bays are fitted with blanking panels
to maintain proper cooling airflow.
(5) No Drive Bays
■System is installed with blanking panels.
Notes
1. Any empty drive bays must be fitted with blanking panels to maintain proper cooling airflow.
2. The flash-backed write cache provides RAID controller cache protection using NAND flash memory and a
supercapacitor. In the event of a power or server failure, cached data is automatically transferred from the
RAID controller DRAM write cache to flash. Once power is restored, the data in the NAND flash is copied back
into the DRAM write cache until it can be flushed to the disk drives.

Cisco UCS B420 M4 Blade Server
CONFIGURING the SERVER
19
STEP 5 CHOOSE HARD DISK DRIVES or SOLID-STATE DRIVES (OPTIONAL)
The UCS B420 M4 can be ordered with or without drives. If you ordered one of the RAID
controller with drive bay options in CHOOSE RAID CONTROLLER AND DISK DRIVE BAYS on page
16 (UCSB-MRAID12G or UCSB-MRAID12G-HE for drive bays one and two, and optionally
UCSB-LSTOR-PT for drive bays three and four), you can order drives listed in this section. The
B420 M4 provides up to four hot plug 2.5” SFF drive bays.
Choose Drives
The supported drives in the UCS B420 M4 are listed in Table 10.
NOTE: 4K format drives are supported and qualified as bootable with Cisco UCS
Manager Release 3.1(2b)and later versions.
Table 10 Supported Hot Plug Drives
Product ID (PID) PID Description Drive
Type Capacity
HDDs
12 Gbps Drives
UCS-HD600G15K12G 600 GB 12G SAS 15K RPM SFF HDD SAS 600 GB
UCS-HD450G15K12G 450 GB 12G SAS 15K RPM SFF HDD SAS 450 GB
UCS-HD300G15K12G 300 GB 12G SAS 15K RPM SFF HDD SAS 300 GB
UCS-HD12TB10K12G 1.2 TB 12G SAS 10K RPM SFF HDD SAS 1.2 TB
UCS-HD900G10K12G 900 GB 12G SAS 10K RPM SFF HDD SAS 900 GB
UCS-HD600G10K12G 600 GB 12G SAS 10K RPM SFF HDD SAS 600 GB
UCS-HD300G10K12G 300 GB 12G SAS 10K RPM SFF HDD SAS 300 GB
SSDs
12 Gbps Drives
UCS-SD16TB12S4-EP 1.6 TB 2.5 inch Enterprise Performance 12G SAS SSD
(10X endurance)
SAS 1.6 TB
UCS-SD800G12S4-EP 800 GB 2.5 inch Enterprise Performance 12G SAS SSD
(10X endurance)
SAS 800 GB
UCS-SD400G12S4-EP 400 GB 2.5 inch Enterprise Performance 12G SAS SSD
(10X endurance)
SAS 400 GB

Cisco UCS B420 M4 Blade Server
20
CONFIGURING the SERVER
Supported Configurations
■Select up to 4 of the drives listed in Table 10. This is dependent on the number of drive
bays selected in CHOOSE RAID CONTROLLER AND DISK DRIVE BAYS on page 16.
Notes
■When creating a RAID volume, mixing different capacity drives causes the system to use the
lowest-capacity drive.
■Mixing of drive types is supported, but performance may be impacted.
■Multiple RAID volumes are supported. RAID volumes should use the same media type.
6 Gbps Drives
UCS-SD16TBKS4-EV 1.6 TB 2.5 inch Enterprise Value 6G SATA SSD (Intel 3510) SATA 1.6 TB
UCS-SD480GBKS4-EV 480 GB 2.5 inch Enterprise Value 6G SATA SSD (Intel 3510) SATA 480 GB
UCS-SD240GBKS4-EV 240 GB 2.5 inch Enterprise Value 6G SATA SSD SATA 240 GB
UCS-SD120GBKS4-EV 120 GB 2.5 inch Enterprise Value 6G SATA SSD (Intel 3510) SATA 120 GB
Table 10 Supported Hot Plug Drives (continued)
Product ID (PID) PID Description Drive
Type Capacity