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SR301 Plus Series
Server Chassis User Manual
January 2020 Version 2.3
A document provides an overview of product features, functions, architecture, and support specifications.
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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
Table of Contents .......................................................................................................................................... 3
List of Figures ................................................................................................................................................ 4
List of Tables ................................................................................................................................................. 5
1. Product Overview .......................................................................................................................... 6
1-1 Front Panel .............................................................................................................................. 7
1-2 Back Panel ............................................................................................................................... 8
1-3 Security Features ..................................................................................................................... 9
1-4 Front Control Panel ............................................................................................................... 10
1-5 System Dimensions ............................................................................................................... 11
1-6 Interior View ......................................................................................................................... 12
1-7 System Level Environmental Specifications ............................................................................ 13
1-8 System Packaging ................................................................................................................. 14
2. System Components Installation and Removal ............................................................................ 15
2-1 Side Cover Installation ........................................................................................................... 15
2-2 Front Bezel Installation & Removal ........................................................................................ 16
2-3 HDD Tray Installation & Removal ........................................................................................... 17
2-4 HDD Fan (below Storage Cage) Maintenance ......................................................................... 20
2-5 Power Supply Installation ...................................................................................................... 22
3. Backplane .................................................................................................................................... 23
3-1 Storage Backplane Options .................................................................................................... 24
3-2 3.5” 4-port 12Gbps Mini-SAS Backplane ................................................................................ 25
3-3 3.5” 4-port 12Gbps SAS/SATA Backplane ............................................................................... 27
4. Maintenance and Service ............................................................................................................ 29
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List of Figures
Figure 1 Front panel (enclosed) ................................................................................................................ 7
Figure 2 Front panel (open) ...................................................................................................................... 7
Figure 3 Back panel with single PSU ......................................................................................................... 8
Figure 4 Padlock Loop and Kensington Slot location ................................................................................. 9
Figure 5 Padlock Loop and intrusion switch location ................................................................................ 9
Figure 6 Front control panel ................................................................................................................... 10
Figure 7 Chassis dimensions ................................................................................................................... 11
Figure 8 Chassis components ................................................................................................................. 12
Figure 9 Side cover installation ............................................................................................................... 15
Figure 10 Bezel installation ...................................................................................................................... 16
Figure 11 Bezel removal ........................................................................................................................... 16
Figure 12 3.5” Hot-swap HDD tray installation ......................................................................................... 17
Figure 13 3.5” Hot-swap HDD tray removal .............................................................................................. 17
Figure 12 3.5” HDD installation (tool-less type) ........................................................................................ 18
Figure 13 3.5” HDD installation (screw type) ............................................................................................ 18
Figure 14 2.5” HDD/SSD installation (screw type) ..................................................................................... 19
Figure 15 Side 2.5” HDD/SSD installation (screw type) ............................................................................. 19
Figure 16 HDD fan installation (fan assembly) .......................................................................................... 20
Figure 17 HDD fan installation (chassis).................................................................................................... 20
Figure 18 HDD fan maintenance............................................................................................................... 21
Figure 19 Single PSU installation-1 (PSU assembly) .................................................................................. 22
Figure 20 Single PSU installation-2 ........................................................................................................... 22
Figure 21 Drive tray LED identification ..................................................................................................... 23
Figure 22 Backplane front view ................................................................................................................ 25
Figure 23 Backplane rear view ................................................................................................................. 26
Figure 24 Backplane front view ................................................................................................................ 27
Figure 25 Backplane rear view ................................................................................................................. 28
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List of Tables
Table 1 Chenbro SR301 Plus specifications ............................................................................................... 6
Table 2 Front control panel .................................................................................................................... 10
Table 3 System environmental specifications summary .......................................................................... 13
Table 4 System packaging information ................................................................................................... 14
Table 5 Product weight information ....................................................................................................... 14
Table 6 Drive power LED/activity LED behavior ...................................................................................... 23
Table 7 Backplane specifications ............................................................................................................ 25
Table 8 Connector and pin header function description ......................................................................... 26
Table 9 Backplane specifications ............................................................................................................ 27
Table 10 Connector and pin header function description ......................................................................... 28
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1. Product Overview
The SR301 chassis has been modified to support both tool-less 3.5” HDD carrier and PCIe 3.0 slot, and transformed into feature-
advanced SR301 Plus. Beneath the chassis, an information sticker reads revision and manufacturing codes which are necessary for
technical support. This chapter provides a high-level overview of the system features and available options. More details for each
major sub-system, feature or options are provided in the following chapters.
Table 1 Chenbro SR301 Plus specifications
Feature
Description
MB Form Factor
Mini-ITX (6.7" x 6.7")
Dimension
(D x W x H)
310.0 x 200.0 x 270.0 (mm)
12.20" x 7.87" x 10.63" (w/o bezel)
Drive Bay
4 x 3.5" Hot-swap, 2 x 2.5" Internal
Storage Backplane
1 x 3.5" 4-port 12Gbps Mini-SAS HD Passive Backplane
1 x 3.5" 4-port 12Gbps SAS/SATA Passive Backplane
PSU Form Factor
PS/2 Single (with 120 mm Fan)
Indicator
1 x Power Status, 1 x HDD Status, 1 x System Alarm
Front Control
1 x Power On/Off, 1 x System Reset, 2 x USB2.0/USB3.0 (Option)
Cooling Fan
Front: 120 x 25 mm (1)
System Security
Intrusion Switch, Key Lock, Padlock Loop, Kensington Slot
Expansion Slot Opening
1 x Low Profile
Net Weight
5.2 kg/11.45 lb
Gross Weight
7.0 kg/15.42 lb
Cubic Feet
1.85
Container Loading
20ʼ: 564, 40ʼ: 1134, 40'H: 1284 (Single Packing)
Slide Rail
Supported
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1-1 Front Panel
Figure 1 Front panel (enclosed)
A. Indicator
Figure 2 Front panel (open)
A. Bezel Door
B. 3.5” Storage Drive Bay
C. Front Control Panel
D. USB3.0
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1-2 Back Panel
Figure 3 Back panel with single PSU
A. PS/2 Single PSU
B. Rear I/O
C. Expansion Slot Opening (Low Profile)
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1-3 Security Features
Figure 4 Padlock Loop and Kensington Slot location
Figure 5 Padlock Loop and intrusion switch location
A. Padlock Loop
B. Key Lock
C. Kensington Slot
D. Intrusion Switch
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1-4 Front Control Panel
Figure 6 Front control panel
Table 2 Front control panel
Label
ICON
Indicator, button or connector
A Power Button with LED
B Power LED
C HDD Activity LED
D
Fan Alarm LED
E
System Reset Button
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1-5 System Dimensions
Figure 7 Chassis dimensions
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1-6 Interior View
Figure 8 Chassis components
A. 3.5” HDD Cage
B. HDD Fan Assembly & Air Duct
C. Power Supply Unit
D. System Board
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1-7 System Level Environmental Specifications
The following table defines the system level specifications under operating and non-operating environments.
Table 3 System environmental specifications summary
Parameter
Specification
Temperature
Operating
5º C to 35º C (41º F to 95º F)
Temperature
Non-Operating
-40º C to 70º C (-40º F to 158º F)
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
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
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.
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1-8 Syst em Packaging
The original Chenbro packaging, where the server system is delivered, is designed to provide protection to a fully configured system
and tested to meet ISTA (International Safe Transit Association) Test Procedure 1A. The packaging is also designed to be reused for
shipment after 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 of the system for subsequent shipment.
Table 4 System packaging information
Part Number
Single/Bulk
Form Factor (mm)
Support Level
87H230169-102
Single
380 x 300 x 450
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 5 Product weight information
NOTE: A L5 system does not include motherboards, processors, memory, 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.
Product
Unpackaged Net Weight
（kg）
Packaged Gross Weight
（kg）
Unpackaged Net Weight
(lb)
Packaged Gross Weight
(lb)
SR301 Plus
5.2
7.0
11.45
15.42
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2. System Components Installation and Removal
SR301 Plus supports up to 4 x 3.5” hot-swap SAS/SATA HDD. Support for different storage and peripheral options will vary depending
on the system model and/or available accessory options installed.
2-1 Side Cover Installation
Figure 9 Side cover installation
1. Align eight latches on the top & bottom of each cover with eight grooves on both sides of the chassis as shown.
2. Slide the cover toward the front panel.
3. Secure each cover with two thumb screws as shown.
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2-2 Front Bezel Installation & Removal
Figure 10 Bezel installation
1. Make sure the key lock of the bezel is on your left side.
2. Lean the right side of the bezel as shown, and align two latches on the bezel with two grooves on the chassis.
3. Push down the bezel until it is secured with three internal latches.
Figure 11 Bezel removal
1. Lift the three internal latches up as shown.
2. Detach the bezel tabs and remove the bezel.
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2-3 HDD Tray Installation & Removal
Figure 12 3.5” Hot-swap HDD tray installation
1. Insert the HDD tray into the cage as shown.
2. Push down the lever to secure the HDD tray.
Figure 13 3.5” Hot-swap HDD tray removal
1. Press the tray button to release the tray.
2. Pull the lever to remove the tray from the HDD cage.
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Figure 12 3.5” HDD installation (tool-less type)
1. Engage two embossed pins with the side dimples on the HDD as shown.
2. Carefully push down the other side of the HDD until another two embossed pins and side dimples lock into place.
NOTE: Due to degraded performance and reliability concerns, the use of the 3.5” drive tray as a 2.5” drive tray is intended to
support SSD type storage devices only. Installing a 2.5” hard disk drive into the 3.5” drive tray cannot be supported.
Figure 13 3.5” HDD installation (screw type)
1. Align the front of the HDD with the anchor point on the tray.
2. Secure 3.5” HDD with the tray by four screws as shown.
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Figure 14 2.5” HDD/SSD installation (screw type)
1. Align the front of the HDD/SSD with the anchor point on the tray.
2. Secure 2.5” HDD/SSD with the tray by three screws from the tray bottom.
NOTE: Dedicated screw type is required for 2.5” HDD/SSD Installation, Chenbro P/N: 384-14602-3143A0.
Figure 15 Side 2.5” HDD/SSD installation (screw type)
1. Align the 2.5” HDD/SSD with the anchor point on the tray and secure the HDD/SSD by four designated screws.
2. Place the HDD/SSD assembly on the side of the storage cage as shown, and slide toward the rear of chassis.
3. Secure the screw on the storage cage to engage the HDD/SSD assembly.
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2-4 HDD Fan (below Storage Cage) Maintenance
Figure 16 HDD fan installation (fan assembly)
Figure 17 HDD fan installation (chassis)
1. Attach the fan with the tool-less fan holder as a fan module.
2. Attach the fan module with the tool-less air duct as a fan assembly.
3. Align the four hooks on the fan holder with four holes on the storage cage as shown.
4. Push the fan assembly toward the front panel until it is locked into place.
5. Plug the fan power connector in the backplane.
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Figure 18 HDD fan maintenance
1. Unplug the fan power connector.
2. Press the tab of the fan holder without release, and pull the fan assembly toward the rear of the chassis.
3. Detach the fan assembly from the storage cage as shown.
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2-5 Power Supply Installation
Figure 19 Single PSU installation-1 (PSU assembly)
Figure 20 Single PSU installation-2
1. Secure the PSU on the power adapter plate with four designated screws as shown.
2. Plug in the power connector.
3. Insert the PSU assembly toward the rear of the chassis until it is locked into place.
4. Secure the power adapter plate with the designated screws.
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3. Backplane
Each drive tray includes separate LED indicators for drive activity and drive status. Light pipes integrated into the drive tray assembly
direct light emitted from the LEDs mounted next to each drive connector on the backplane to the drive tray faceplate, making them
visible from the front of the system.
Figure 21 Drive tray LED identification
Table 6 Drive power LED/activity LED behavior
LED
ICON
LED
Color
Behavior
Condition
A Power LED
N/A
Stay off
Fault
Blue
Solid on
Present
B Activity LED
Green
Solid on
Access
Red
Solid on
Failure
1Hz blink
Rebuild
4Hz blink
Locate
NOTE: The drive activity LED is driven by signals coming from the drive itself. Drive vendors may choose to operate the activity
LED differently from what is described in the table above. Should the activity LED on a given drive type behave differently than
what is described, customers should take the driver vendor specifications as a reference for the specific drive model to determine
what the expected drive activity LED operation should be.
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3-1 Storage Backplane Options
SR301 Plus supports the below bac kplanes:
1 x 3.5” 4-port 12Gbps Mini-SAS HD passive backplane
1 x 3.5” 4-port 12Gbps SAS/SATA passive backplane
All available SAS/SATA backplanes include the following common features:
12Gbps SAS and 6Gbps SAS/SATA
29-pin SFF-8680 12Gbps rated drive interface connectors, providing both power and I/O signals to attached devices
Hot-swap support for SAS/SATA devices
I2C interface from a 4-pin connector for device status communication to the BMC over SMBus
LEDs to indicate drive activity and status for each attached device
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3-2 3.5” 4-Port 12Gbps Mini-SAS HD Backplane
Table 7 Backplane specifications
Specification
Host Interface
Mini-SAS HD (SFF-8643), Right Angle
HDD Interface
SFF-8680 (SAS 29-pin)
Hot-Swap
Yes, allows users to replace devices online
Display
LED indicates storage device status
Power LED – Off (Fault)
– Blue (Present)
Activity LED – Green on (Access)
– Red on (Failure)
– Red 1Hz blink (Rebuild)
– Red 4Hz blink (Locate)
Environment Monitor
Temperature sensor TMP75
Connector
1. 1 x Mini-SAS HD
2. 4 x SFF-8680
3. 2 x 4-pin peripheral power
4. 1 x SGPIO jumper
5. 1 x 4-pin PWM fan header
6. 1 x hardware monitor display header
7. 1 x hardware monitor DIP switch
8. 1 x I2C
Dimension (L x W x H)
130.1 x 104.5 x 2.4 (mm)
Material
FR4 4 layers
Figure 22 Backplane front view
A. HDD_00
B. HDD_01
C. HDD_02
D. HDD_03
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Figure 23 Backplane rear view
Table 8 Connector and pin header function description
Label
Description
Description
Drawing
A
Mini-SAS HD
For connecting to a mainboard or HBA, this Mini-SAS HD
connector is applied. A proper cable selection is essential as well
to make sure good signal integrity, which can be maintained for
the whole connection path from a mainboard or HBA/RAID card
to the HDD devices.
B
Power
These two connectors are used to power four 3.5” hard disks,
connected to this backplane, and each can ensure that all drives
are supplied with stable power inputs. If the chassis fan is also
powered by fan header (JF01), this configuration is highly
recommended.
C
Fan
There are two 4-pin headers for the PWM fan, and it is an
alternative solution that the chassis fan can be powered and
monitored by this backplane instead of a motherboard. If the
chassis fan is connected to a mainboard, users need to disable
the fan monitoring function of backplane by DIP switch (SW1).
D
Signal Indicator
The event LED with red/black wire is located on the front bezel
of SR301 Plus and can be configured through this pin header.
E
Power
Mail
Mute
Transfer mute signal from a backplane to PSU.
F
Power
Fail
Alarm
Send alarm signal to PSU.
G
Buzzer
Buzzer will alarm when fan and temperature become abnormal.
H
DIP Switch
The settings of on-board hardware monitor can be controlled
and configured through this DIP switch. It can manage the
functions of PWM fan & temperature threshold.
I
I2C
The motherboard can monitor HDD temperature and fan status
through this connector. However, the I2C connector on the
motherboard side is dependent on vendors, so please contact
our field application engineers to fully utilize this feature.
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3-3 3.5” 4-Port 12Gbps SAS/SATA Backplane
Table 9 Backplane specifications
Specification
Host Interface
SATA 7-pin
HDD Interface
SFF-8680 (SAS 29-pin)
Hot-Swap
Yes, allows users to replace devices online
Display
LED indicates storage device status
Power LED – Off (Fault)
– Blue on (Present)
Activity LED – Green on (Access)
– Red on (Failure)
– Red 1Hz blink (Rebuild)
– Red 4Hz blink (Locate)
Environment Monitor
Temperature sensor TMP75
Connector
1. 4 x 7-pin SATA
2. 4 x SFF-8680
3. 2 x 4-pin peripheral power
4. 1 x pin header 2.0 mm (1 x 3)
5. 1 x pin header 2.0 mm (2 x 3)
6. 1 x pin header 2.54 mm (2 x 3)
7. 2 x pin header 2.54 mm (2 x 5)
8. 1 x 4-pin Wafer 2.5 mm
9. 2 x 2-pin Wafer 2.54 mm
Dimension (L x W x H)
130.1 x 104.5 x 2.4 (mm)
Material
FR4 4 layers
Figure 24 Backplane front view
A. HDD_00 C. HDD_02
B. HDD_01 D. HDD_03
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Figure 25 Backplane rear view
Table 10 Connector and pin header function description
Label
Description
Description
Drawing
A
SAS/SATA
For connecting to a mainboard, this SATA 7-pin connector is
applied. A proper cable selection is essential as well to make sure
good signal integrity, which can be maintained for the whole
connection path from mainboard HDD devices.
B
Power
These two connectors are used to power four 3.5” hard disks,
connected to this backplane, and each can ensure that all drives
are supplied with stable power inputs. If the chassis fan is also
powered by fan header (JF01), this configuration is highly
recommended.
C
Fan
There are two 4-pin headers for the PWM fan, which is an
alternative solution that the chassis fan can be powered and
monitored by this backplane instead of a motherboard. If the
chassis fan is connected to a mainboard, users need to disable
the fan monitoring function of backplane by DIP switch (SW1).
D
Signal Indicator
The event LED with red/black wire is located on front bezel of
SR301 Plus and can be configured through this pin header.
E
Buzzer
Buzzer will alarm when fan and temperature become abnormal.
F
DIP Switch
The settings of on-board hardware monitor can be controlled
and configured through this DIP switch. It can manage the
functions of PWM fan & Buzzer On/Off.
G
I2C
The motherboard can monitor HDD temperature and fan status
through this connector. However, the I2C connector on the
motherboard side is dependent on vendors, so please contact
our field application engineers to fully utilize this feature.
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4. Maintenance and Service
DOA (Dead on Arrival)
If the products are found Defect On Arrival, please contact Chenbro’s regional sales or CQE and indicate the defective status via email
along with product photos and description. You may need to return the defective item by request.
The customer should ensure that the products are Defect On Arrival for up to three months from Chenbro’s shipping date and the
damage is not caused by shipping or failures resulting from accident, misuse, abuse, neglect, mishandling, misapplication,
modification, improper operation, improper repair or rework. CHENBRO is not responsible for the cost of replacement including the
delivery cost.
CHENBRO also reserves the right to examine the DOA products. If the damage of DOA products is caused by improper action as
described above, the customer will be liable for paying the related charge having occurred or paying the fee of the replacements if
the DOA products are totally scrapped.
TECHNICAL SUPPORT
Please provide following information when you apply our technical support:
⚫ Product model name and/or part number
⚫ Product serial number and bar code
⚫ Buzzer beeping pattern and/or failure LED flashing pattern
⚫ Detailed and specific questions
You may also contact Chenbro’s regional technical supports as below: www.chenbro.com
CENBRO MICOM CO., LTD.
Email: fae@chenbro.com
Tel: +886-2-82265500
Fax: +886-2-82265392
CHENBRO MICOM (USA) INC.
Email: usfae@chenbro.com
Tel: +1-909-947-3200
Fax: +1-909-947-4300
CHENBRO GmbH
Email: defae@chenbro.com
Tel: + 49-2154-8142730
Apply a RMA
number
Return the product for
repair
Receive service
charge notice
Receive the repaired
product
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