Chenbro RM238 Series User manual

RM238 Series
Rackmount Chassis User Manual
January 2020 Version 1.1
A document provides an overview of product features, functions, architecture, and support specifications.

RM238 Series
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DISCLAIMERS
No license (express or implied, by estoppel or otherwise) to any intellectual property rights is granted by this document.
Chenbro disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness
for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or
usage in trade.
This document contains information on products, services and/or processes in development. All information provided here is subject
to change without notice. Contact your Chenbro representative to obtain the latest Configuration Guide.
The products and services described may contain defects or errors known as errata which may cause deviations from published
specifications. Current characterized errata are available on request.
Chenbro, and the Chenbro logo are trademarks of Chenbro Micom Co., Ltd. in the worldwide.
*Other names and brands may be claimed as the property of others
© 2019 Chenbro Micom Co., Ltd.

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Table of Contents
List of Figures................................................................................................................................................4
List of Tables .................................................................................................................................................7
1. Product Overview.........................................................................................................................8
1-1 System Features Overview.......................................................................................................9
1-2 Front Panel............................................................................................................................11
1-3 Back Panel.............................................................................................................................12
1-4 Front Control Panel ...............................................................................................................13
1-5 Storage Configurations ..........................................................................................................14
1-6 Chassis Dimensions ...............................................................................................................16
1-7 Available Rack Mounting Kit Options (Refer to “Installation”) ................................................17
1-8 System Level Environmental Specifications............................................................................18
1-9 System Packaging.................................................................................................................19
2. System Components Removal and Installation ............................................................................20
2-1 Top Cover Removal and Installation.......................................................................................21
2-2 HDD Cage Removal and Installation.......................................................................................23
2-3 Hot-swap HDD Assembly Removal and Installation................................................................24
2-4 Internal 2.5’’ HDD Removal and Installation.............................................................................31
2-5 Slim ODD Removal and Installation..........................................................................................32
2-6 System Maintenance .............................................................................................................33
2-7 Fan Assembly Removal and Installation .................................................................................34
2-8 2.5" 2-bay Drive Cage Installation (Back Panel) ......................................................................37
2-9 Full-height PCIe Card Installation...........................................................................................39
2-10 PSU Installation and Removal ..............................................................................................40
2-11 Slide Rail Installation ...........................................................................................................43
3. Backplane....................................................................................................................................45
3-1 Storage Backplane Options....................................................................................................46
3-2 3.5” 8-Port 12Gbps Mini-SAS HD Passive Backplane ..............................................................47
3-3 3.5” 12-Port 12Gbps Mini-SAS HD Passive Backplane ............................................................50
3-4 3.5” 12-Port 12Gbps Mini-SAS HD Active Backplane ..............................................................53
3-5 2 x 2.5’’ Drive Bay Accessory Kit.............................................................................................56
3-6 2.5” 8-Port 12Gbps Mini-SAS HD Passive Backplane ..............................................................61
3-7 2.5” 16-Port 12Gbps SAS Passive Backplane Docked with Expander Board ............................63
3-8 2.5” 8-Port SATA/SAS/NVMe (4 x Tri-mode) Passive Backplane ..............................................67
3-9 2.5” 8-Port PCIe Gen3 NVMe Passive Backplane....................................................................69
4. Maintenance and Service ............................................................................................................71

RM238 Series
List of Figures│ 4
List of Figures
Figure 1 RM23808 overview....................................................................................................................9
Figure 2 RM23812 overview....................................................................................................................9
Figure 3 RM23824 overview....................................................................................................................9
Figure 4 RM23808 major components overview....................................................................................10
Figure 5 RM23812 major components overview....................................................................................10
Figure 6 RM23824 major components overview....................................................................................10
Figure 7 RM23808 front panel ...............................................................................................................11
Figure 8 RM23812 front panel ...............................................................................................................11
Figure 9 RM23824 front panel ...............................................................................................................11
Figure 10 Back panel with single PSU .......................................................................................................12
Figure 11 Back panel with redundant PSU................................................................................................12
Figure 12 Front control panel...................................................................................................................13
Figure 13 8 x 3.5” front drive bay configuration .......................................................................................14
Figure 14 12 x 3.5” front drive bay configuration......................................................................................14
Figure 15 24 x 2.5” front drive bay configuration (24 x SATA/SAS) ............................................................14
Figure 16 24 x 2.5” front drive bay configuration (4 x NVMe + 20 x SATA/SAS) .........................................15
Figure 17 24 x 2.5” front drive bay configuration (8 x NVMe + 16 x SATA/SAS) .........................................15
Figure 18 24 x 2.5” front drive bay configuration (20 x NVMe + 4 x SATA/SAS) .........................................15
Figure 19 24 x 2.5” front drive bay configuration (24 x NVMe) .................................................................15
Figure 20 Chassis dimensions...................................................................................................................16
Figure 21 Label embossing dimensions ....................................................................................................16
Figure 22 Rear top cover removal ............................................................................................................21
Figure 23 Front top cover removal...........................................................................................................21
Figure 24 Front top cover installation ......................................................................................................22
Figure 25 Rear top cover installation........................................................................................................22
Figure 26 HDD cage removal....................................................................................................................23
Figure 27 HDD cage installation ...............................................................................................................23
Figure 28 3.5” hot-swap HDD assembly removal......................................................................................24
Figure 29 3.5” hot-swap HDD assembly installation .................................................................................24
Figure 30 3.5” HDD removal (tool-less type) ............................................................................................25
Figure 31 3.5” HDD installation (tool-less type)........................................................................................25
Figure 32 3.5" HDD removal (screw type).................................................................................................26
Figure 33 3.5" HDD installation (screw type) ............................................................................................26
Figure 34 2.5" hot-swap HDD assembly removal......................................................................................27
Figure 35 2.5’’ hot-swap HDD assembly installation .................................................................................27
Figure 36 2.5’’ HDD removal (tool-less type) ............................................................................................28
Figure 37 2.5’’ HDD installation (tool-less type)........................................................................................28
Figure 38 2.5" HDD removal (screw type).................................................................................................29

RM238 Series
List of Figures│ 5
Figure 39 2.5” HDD installation (screw type)............................................................................................29
Figure 40 2.5’’ HDD removal in 3.5” tray (screw type) ..............................................................................30
Figure 41 2.5’’ HDD installation in 3.5” tray (screw type)..........................................................................30
Figure 42 Internal 2.5'' HDD removal (RM23808) .....................................................................................31
Figure 43 RM23808 internal 2.5'' HDD installation ...................................................................................31
Figure 44 RM23808 slim ODD removal.....................................................................................................32
Figure 45 RM23808 slim ODD installation ................................................................................................32
Figure 46 Removal of whole system from the rack ...................................................................................33
Figure 47 Installation of whole system into the rack.................................................................................33
Figure 48 Fan assembly removal ..............................................................................................................34
Figure 49 Fan assembly installation..........................................................................................................34
Figure 50 Fan module removal.................................................................................................................35
Figure 51 Fan module installation ............................................................................................................35
Figure 52 Air baffle removal.....................................................................................................................36
Figure 53 Air baffle installation ................................................................................................................36
Figure 54 Drive cage bracket installation (back panel)..............................................................................37
Figure 55 Drive cage installation (back panel) ..........................................................................................37
Figure 56 Drive backplane installation (back panel)..................................................................................38
Figure 57 Full-height back panel bracket installation................................................................................39
Figure 58 Cards and brackets installation .................................................................................................39
Figure 59 Single 2U PSU installation.........................................................................................................40
Figure 60 Redundant PSU cage assembly .................................................................................................41
Figure 61 Redundant PSU cage installation ..............................................................................................41
Figure 62 CRPS module installation..........................................................................................................42
Figure 63 CRPS module removal ..............................................................................................................42
Figure 64 Slide rail installation-1 (384-23803-3300B0) .............................................................................43
Figure 65 Slide rail installation-2 (384-23803-3300B0) .............................................................................43
Figure 66 Slide rail installation-3 (384-23803-3300B0) .............................................................................44
Figure 67 Slide rail Installation-4 (384-23803-3300B0) .............................................................................44
Figure 68 Drive tray LED identification .....................................................................................................45
Figure 69 Backplane front view................................................................................................................47
Figure 70 Backplane rear view .................................................................................................................48
Figure 71 Backplane front view................................................................................................................50
Figure 72 Backplane rear view .................................................................................................................51
Figure 73 Backplane front view................................................................................................................53
Figure 74 Backplane rear view .................................................................................................................54
Figure 75 2.5'' 2-bay drive module ...........................................................................................................56
Figure 76 Backplane front view................................................................................................................57
Figure 77 Backplane rear view .................................................................................................................58

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Figure 78 Backplane front view................................................................................................................59
Figure 79 Backplane rear view .................................................................................................................60
Figure 80 Backplane front view................................................................................................................61
Figure 81 Backplane rear view .................................................................................................................62
Figure 82 Backplane front view................................................................................................................63
Figure 83 Backplane rear view .................................................................................................................64
Figure 84 Expander board rear view.........................................................................................................65
Figure 85 Expander board front view .......................................................................................................66
Figure 86 Backplane front view................................................................................................................67
Figure 87 Backplane rear view .................................................................................................................68
Figure 88 Backplane front view................................................................................................................69
Figure 89 Backplane rear view .................................................................................................................70

RM238 Series
List of Tables│ 7
List of Tables
Table 1 Chenbro RM23808/12/24 specifications ......................................................................................8
Table 2 Front control panel ....................................................................................................................13
Table 3 Slide rail options ........................................................................................................................17
Table 4 System environmental specifications summary..........................................................................18
Table 5 System packaging information ...................................................................................................19
Table 6 Product weight information .......................................................................................................19
Table 7 Drive power LED/activity LED behavior ......................................................................................45
Table 8 Backplane specifications ............................................................................................................47
Table 9 Connector and pin header function description .........................................................................48
Table 10 Fan setting for RM23808............................................................................................................49
Table 11 Backplane specifications ............................................................................................................50
Table 12 Connector and pin header function description .........................................................................51
Table 13 Dip switch setting.......................................................................................................................52
Table 14 Backplane specifications ............................................................................................................53
Table 15 Connector and pin header function description .........................................................................54
Table 16 Dip switch setting.......................................................................................................................55
Table 17 Fan setting for RM23812............................................................................................................55
Table 18 Solution and operating condition ...............................................................................................56
Table 19 Backplane specifications ............................................................................................................57
Table 20 Connector and pin header function description .........................................................................58
Table 21 Backplane specifications ............................................................................................................59
Table 22 Connector and pin header function description .........................................................................60
Table 23 Backplane specifications ............................................................................................................61
Table 24 Connector and pin header function description .........................................................................62
Table 25 Dip switch setting.......................................................................................................................62
Table 26 Backplane specifications ............................................................................................................63
Table 27 Connector and pin header function description .........................................................................64
Table 28 Expander board specifications ...................................................................................................65
Table 29 Connector and pin header function description .........................................................................66
Table 30 Dip switch setting.......................................................................................................................66
Table 31 Backplane specifications ............................................................................................................67
Table 32 Connector and pin header function description .........................................................................68
Table 33 Backplane specifications ............................................................................................................69
Table 34 Connector and pin header function description .........................................................................70

RM238 Series
Product Overview│ 8
1. Product Overview
RM238 series offers a variety of system options to meet the various configuration requirements of high-density/high-performance
computing environments. This 2U chassis supports both 2.5” and 3.5” storage form factors with different drive bay configurations.
This chapter provides a high-level overview of the system features and available options. More details for each major sub-systme,
feature, or option are provided in the following chapters.
Table 1 Chenbro RM23808/12/24 specifications
Feature
Description
MB Form Factor
SSI EEB (12”x 13”)
Dimension
(D x W x H)
658.6 x 438.0 x 87.0 (mm)
25.93” x 17.24”x 3.43”
Drive Bay
RM23808: 8 x 3.5”Hot-swap, 2 x 2.5”Internal, 1 x Slim ODD
RM23812: 12 x 3.5”Hot-swap
RM23824: 24 x 2.5”Hot-swap, 2 x 2.5”Hot-swap (Rear, Option)
Storage Backplane
RM23808: 3.5” 8-port 12Gbps, Mini-SAS HD
RM23812: 3.5” 12-port 12Gbps, Mini-SAS HD, Passive or Active
RM23824: 2.5” 8-port 12Gbps, Mini-SAS HD, 2.5” 16-port 12Gbps, Mini-SAS HD, Expander
RM23824 (NVMe): 2.5” 8-port 12Gbps, Mini-SAS HD, 4-port Tri-mode,
2.5” 8-port PCIe Gen3, OCuLink
PSU Form Factor
1+1 CRPS or Single 2U
Indicator
1 x Power Status, 2 x LAN Activity, 1 x UID, 1 x System Alarm, 1 x HDD Status
Front Control
1 x Power On/Off, 1 x UID, 1 x System Reset, 2 x USB3.0
System Security
Intrusion Switch (option)
Cooling Fan
80 x 25/38 mm (3, up to 4), Hot-swap/Non Hot-swap
Expansion Slot Opening
7 x Low Profile or 3 x Full Height
Net Weight
11.5 kg/25.33 lb
Gross Weight
14.0 kg/30.84 lb
Cubic Feet
3.30
Container Loading
20': 200, 40': 460, 40'H: 506 (Single Packing)

RM238 Series
Product Overview│ 9
1-1 System Features Overview
Figure 1 RM23808 overview
Figure 2 RM23812 overview
Figure 3 RM23824 overview

RM238 Series
Product Overview│ 10
Figure 4 RM23808 major components overview
Figure 5 RM23812 major components overview
Figure 6 RM23824 major components overview
A. Front Top Cover
B. Rear Top Cover
C. Label Embossing
D. Rear Top Cover Latch
E. Internal 2.5”HDD Bays
F. Fan Assembly
G. Slim ODD Bay
H. Server Board
I. 2.5”HDD Hot-swap Cage
J. Power Supply Unit

RM238 Series
Product Overview│ 11
1-2 Front Panel
Figure 7 RM23808 front panel
Figure 8 RM23812 front panel
Figure 9 RM23824 front panel
A. Front Control Panel
B. Storage Drive Bay
C. Info Tag
D. Rack Handles
E. Slim ODD Bay

RM238 Series
Product Overview│ 12
1-3 Back Panel
Figure 10 Back panel with single PSU
Figure 11 Back panel with redundant PSU
A. 2U Single Power Supply
B. CRPS
C. I/O Gasket
D. Low Profile Expansion Slots
E. 2.5”Hot-swap Drive Bay

RM238 Series
Product Overview │ 13
1-4 Front Control Panel
Figure 12 Front control panel
Table 2 Front control panel
Label
ICON
Indicator, button or connector
A
PowerButton
B
UID Button
C
ResetButton
D
USB3.0
E
HDD ActivityLED
F
SystemAlarmLED
G
LAN1,LAN2ActivityLED
H
RackHandle(Left)
I
RackHandle(Right)

RM238 Series
Product Overview │ 14
1-5 Storage Configurations
Figure 13 8 x 3.5” front drive bay configuration
Figure 14 12 x 3.5” front drive bay configuration
Figure 15 24 x 2.5” front drive bay configuration (24 x SATA/SAS)

RM238 Series
Product Overview │ 15
Figure 16 24 x 2.5” front drive bay configuration (4 x NVMe + 20 x SATA/SAS)
Figure 17 24 x 2.5” front drive bay configuration (8 x NVMe + 16 x SATA/SAS)
Figure 18 24 x 2.5” front drive bay configuration (20 x NVMe + 4 x SATA/SAS)
Figure 19 24 x 2.5” front drive bay configuration (24 x NVMe)

RM238 Series
Product Overview │ 16
1-6 Chassis Dimensions
Figure 20 Chassis dimensions
Figure 21 Label embossing dimensions

RM238 Series
Product Overview │ 17
1-7 Available Rack Mounting Kit Options (Refer to “Installation”)
Advisory Note –Available rack and cabinet mounting kits are not designed to support shipment of the server system while installed
in a rack. If you chose to do so, Chenbro advises you to verify your shipping configuration with appropriate shock and vibration testing
before shipment. Chenbro does not perform shipping tests which cover the complex combination of unique rack offerings and custom
packaging options.
Caution: Exceeding the specified maximum weight limit of a given rail kit or misalignment of the server in the rack may result in
failure of the rack rails, causing damage to the system or personal injury. Two persons to operate or the use of a mechanical assist
tool to install and align the server into the rack is highly recommended.
Available rack mounting kits:
Table 3 Slide rail options
Part Number
384-23803-3300D0
84H314610-003
Rail Dimension (mm/inch)
835.0/32.90"
599.0/23.60"
Applicable Cabinet-Post to Post (mm/inch)
668.0~937.0/26.30"~36.90"
660.0~838.0/26.00"~33.00"
3 Section/2 Section
3 Section
2 Section
Post to Post Distance (mm/inch)
668.0~937.0/26.30"~36.90"
660.0~838.0/26.00"~33.00"
Traveling Distance (mm/inch)
782.0/30.80"
560.0/22.00"
Support Chassis Width (mm)
438.0
438.5
Loading (kg)
30.8 kg
18.8 kg
Tool-less
Yes
Yes
Support CMA
Yes
No

RM238 Series
Product Overview │ 18
1-8 System Level Environmental Specifications
The following table defines the system level specifications under operating and non-operating environments.
Table 4 System environmental specifications summary
Parameter
Specification
Temperature
Operating
5ºC to 35ºC (41ºF to 95ºF)
Temperature
Non-Operating
-40ºC to 70ºC (-40ºF to 158ºF)
Humidity
Non-Operating
50% to 90%, non-condensing with a maximum wet bulb of 28°C (at temperatures
from 25°C to 35°C)
Unpackaged
Shock
Non-Operating
Trapezoidal, 25 g, velocity change is based on product weight
Unpackaged
Vibration
Operating
5 Hz @ 0.0002 g2/Hz to 350 Hz @ 0.0002 g2/Hz
Input acceleration is 0.26 g RMS
10 minutes per axis for all 3 axes on all samples
Random control limit tolerance is ± 3 dB
Sag & Bow
Non-Operating
Tolerance analysis among rack, rail and chassis
Actual on rack test with EIA Go-NoGo fixture
EMI
Pre-scan
Radiated Emissions
CISPR CLASS A (under 6 dB):
30~1000 MHz vertical/horizontal
1G~6G GHz vertical/ horizontal
1G~18G GHz vertical/horizontal
ESD
Contact and Air Discharge
Electrostatic Discharge Immunity Test IEC 61000-4-2
RVI
Operating
HDD class:
Class 1: Highest performance, reliability, and data integrity
Class 2: A second tier of performance, reliability, and data integrity
HDD I/O throughput degradation SPEC
Pass/Fail Criteria:
No functional failure during test or post-test diagnostics.
Requirement to pass test is based on IOMeter data throughput (in IO’s per
second) expressed as a percent of Test HDD maximum theoretical baseline
performance
Class1: > 90% of baseline for 4K random writes and > 80% of baseline for
128K sequential writes
Class2: > 85% of baseline for 4K random writes and > 75% of baseline for
128K sequential writes
Mix: > 80% of baseline for 4K random writes and > 70% of baseline for
128K sequential writes
Packaged
Vibration
Non-Operating
ISTA (weight over 68 kg, 1B ; weight equal or less than 68 kg, 1A)
Packaged
Drop
Non-Operating
Drop height change is based on product weight
Non-palletized product:
Investigation: Test requirement is 6 face drops, 8 corner drops and 12 edge
drops for a total of 26 drops
Validation: Test requirement is 6 face drops, 2 corner drops and 3 edge
drops for a total of 11 drops
Palletized product: (Both investigation and validation)
Perform two bottom drops at the specified height, 10 bottom drops at one
half of the specified height
Perform 4 rotational edge drops (one per edge) at the specified height

RM238 Series
Product Overview │ 19
1-9 System Packaging
The original Chenbro packaging, where the server system is delivered, is designed to provide protection for L5 configuration and
tested to meet ISTA (International Safe Transit Association) Test Procedure 1A (2008). The packaging is also designed to be reused
for shipment after the system integration has been completed.
The original packaging includes the shipping box and various protective inner packaging components, which are designed to function
together as a protective packaging system. When reused, all of the original packaging material must be used, including box and each
inner packaging component. In addition, all inner packaging components MUST be reinstalled in the proper location to ensure
adequate protection to the system for subsequent shipment.
Table 5 System packaging information
Part Number
Single/Bulk
Form Factor (mm)
Support level
387-23812-3300A0
Single
830 x 590 x 190
L5
NOTE: The design of the inner packaging components does not prevent improper placement within the packaging
assembly. There is only one correct packaging assembly that will allow the package to meet the ISTA (International Safe
Transit Association) Test Procedure 1A (2008).
Failure to follow the specified packaging assembly instructions may result in damage to the system during shipment.
Table 6 Product weight information
Product
Unpackaged Net Weight
（kg）
Packaged Gross Weight
（kg）
Unpackaged Net Weight
(lb)
Packaged Gross Weight
(lb)
RM23808
13.7
16.3
30.20
36.00
RM23812
14.3
16.9
31.40
37.10
RM23824
14.0
16.6
30.80
36.50
NOTE: A L5 system does not include motherboards, processors, memories, drives, or add-in cards. It is the system
configuration as shipped from Chenbro. Weights of integrated system (system configurations that include the items
above) will vary depending on the final system configuration.

RM238 Series
System Components Removal and Installation │ 20
2. System Components Removal and Installation
RM238 series supports a variety of different storage options:
Up to 8 x 3.5” hot-swap HDD or 2.5” HDD/SSD (RM23808)
Up to 12 x 3.5” hot-swap HDD or 2.5” HDD/SSD (RM23812)
Up to 24 x 2.5”hot-swap HDD/SSD (RM23824)
1 x Slim ODD (RM23808)
2 x 2.5’’ hot-swap SATA SSD [7 mm or 9.5 mm thickness] or NVMe SSD [7 mm or 15 mm thickness with upgrade kit]
Support for different storage and peripheral options will vary depending on the system model and/or available accessory options
installed.