WWN

1BAR CODE3

SEC_MODE4

1

A

PRI_MODE43
A

12V_LED 5V_LED
C

A

C

2

GND

OVERHEATFAIL1

C
A

+

1

1

WWN

+

+5V

2

C

FANFAIL1
REMOTE_FAN_FAIL_SCOKET

+

+

+

+

1

+

+

+

SUPER

®

+

GND
+12V

+
+

BUZZER_ENB1

SAS826EL

+
+12V

GND

GND

+5V

+12V

GND

GND

REV 1.02+5V

DESIGNED IN USA

SAS-826EL Series Backplane

USER'S GUIDE
Rev. 1.0d

SAS-826EL Series Backplane User's Guide
The information in this User’s Manual has been carefully reviewed and is believed to be accurate.
The vendor assumes no responsibility for any inaccuracies that may be contained in this document,
makes no commitment to update or to keep current the information in this manual, or to notify any
person or organization of the updates. Please Note: For the most up-to-date version of thismanual, please see our web site at www.supermicro.com.
Super Micro Computer, Inc. ("Supermicro") reserves the right to make changes to the productdescribed in this manual at any time and without notice. This product, including software anddocumentation, is the property of Supermicro and/or its licensors, and is supplied only under alicense. Any use or reproduction of this product is not allowed, except as expressly permitted by
the terms of said license.
IN NO EVENT WILL SUPERMICRO BE LIABLE FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL,
SPECULATIVE OR CONSEQUENTIAL DAMAGES ARISING FROM THE USE OR INABILITY TO
USE THIS PRODUCT OR DOCUMENTATION, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES. IN PARTICULAR, SUPERMICRO SHALL NOT HAVE LIABILITY FOR ANY
HARDWARE, SOFTWARE, OR DATA STORED OR USED WITH THE PRODUCT, INCLUDING THE
COSTS OF REPAIRING, REPLACING, INTEGRATING, INSTALLING OR RECOVERING SUCH
HARDWARE, SOFTWARE, OR DATA.															Any disputes arising between manufacturer and customer shall be governed by the laws of Santa
Clara County in the State of California, USA. The State of California, County of Santa Clara shallbe the exclusive venue for the resolution of any such disputes. Super Micro's total liability for all
claims will not exceed the price paid for the hardware product.
													California Best Management Practices Regulations for Perchlorate Materials: This Perchlorate
warning applies only to products containing CR (Manganese Dioxide) Lithium coin cells. “Perchlorate
Material-special handling may apply. See www.dtsc.ca.gov/hazardouswaste/perchlorate”

WARNING: Handling of lead solder materials used in thisproduct may expose you to lead, a chemical known to
the State of California to cause birth defects and otherreproductive harm.

Manual Revision 1.0d							Release Date: July 29, 2010
Unless you request and receive written permission from Super Micro Computer, Inc., you may notcopy any part of this document.
Information in this document is subject to change without notice. Other products and companies
referred to herein are trademarks or registered trademarks of their respective companies or markholders.
Copyright © 2010 by Super Micro Computer, Inc.
All rights reserved.

Printed in the United States of AmericaiiPreface

Table of Contents

Contacting Supermicro........................................................................................iv
Returning Merchandise for Service.....................................................................v

Chapter 1 Safety Guidelines.....................................................................1-1
1-2

General Safety Guidelines............................................................................... 1-1

Chapter 2 Connectors, Jumpers and LEDs............................................. 2-1
2-1

Front Connectors............................................................................................. 2-1

2-2

Front Connectors and Pin Definitions.............................................................. 2-2
Explanation of Jumpers................................................................................... 2-3

2-4

Rear Connectors and LED Indicators.............................................................. 2-6

Chapter 3 Dual Port and Cascading Configurations . ........................... 3-1
3-1

Single and Dual Port Expanders .................................................................... 3-1
Single Ports...................................................................................................... 3-1
Dual Ports........................................................................................................ 3-1

3-2

Failover............................................................................................................. 3-2

3-3

Failover with RAID Cards and Multiple HBAs................................................. 3-3

3-4

Cables and Chassis Power Card ................................................................... 3-4
Chassis Power Card........................................................................................ 3-4
Connecting an Internal Host Bus Adapter to the Backplane . ........................ 3-5
Supported Internal HBA to Backplane Cables................................................. 3-6
Connecting an External Host Bus Adapter to the Backplane . ....................... 3-7
Supported External HBA to Backplane Cable................................................. 3-8
Connecting Multiple Backplanes in a Single Channel Environment................ 3-9
Single HBA Configuration................................................................................ 3-9
Single HBA Configuration Cables.................................................................. 3-10
Connecting Multiple Backplanes in a Dual Channel Environment.................3-11
Dual HBA Configuration Cables..................................................................... 3-12

3-5

Supported Cascading Configuration ............................................................. 3-13
Server System with Dual SAS HBA and Cascading Configuration............... 3-14

iii

SAS-826EL Series Backplane User's Guide

Contacting Supermicro
Headquarters
Address:

Super Micro Computer, Inc.
980 Rock Ave.
San Jose, CA 95131 U.S.A.

Tel:+1 (408) 503-8000

Fax:+1 (408) 503-8008

Email:

marketing@supermicro.com (General Information)
support@supermicro.com (Technical Support)

Web Site:www.supermicro.com

EuropeAddress:

Super Micro Computer B.V.
Het Sterrenbeeld 28, 5215 ML's-Hertogenbosch, The NetherlandsTel:+31 (0) 73-6400390

Fax:+31 (0) 73-6416525

Email:

sales@supermicro.nl (General Information)
support@supermicro.nl (Technical Support)
rma@supermicro.nl (Customer Support)

Asia-Pacific
Address:

Super Micro Computer, Inc.
4F, No. 232-1, Liancheng Rd.
Chung-Ho 235, Taipei County
Taiwan, R.O.C.

Tel:+886-(2) 8226-3990

Fax:+886-(2) 8226-3991

Web Site:www.supermicro.com.tw

Technical Support:
Email:

support@supermicro.com.tw

Tel:886-2-8226-1900

iv

Preface

Returning Merchandise for Service

A receipt or copy of your invoice marked with the date of purchase is required before any warranty service will be rendered. You can obtain service by calling yourvendor for a Returned Merchandise Authorization (RMA) number. When returning
to the manufacturer, the RMA number should be prominently displayed on theoutside of the shipping carton, and mailed prepaid or hand-carried. Shipping andhandling charges will be applied for all orders that must be mailed when service
is complete.
For faster service, RMA authorizations may be requested online (http://www.supermicro.com/support/rma/).
Whenever possible, repack the backplane in the original Supermicro box, using theoriginal packaging materials. If these are no longer available, be sure to pack the
backplane in an anti-static bag and inside the box. Make sure that there is enoughpackaging material surrounding the backplane so that it does not become damaged
during shipping.
This warranty only covers normal consumer use and does not cover damages incurred in shipping or from failure due to the alteration, misuse, abuse or improper
maintenance of products.
During the warranty period, contact your distributor first for any product problems.  

v

SAS-826EL Series Backplane User's Guide

Notes

vi

Chapter 1: Safety Guidelines

Chapter 1
Safety Guidelines

To avoid personal injury and property damage, carefully follow all the safety steps
listed below when accessing your system or handling the components.

1-1

ESD Safety Guidelines

Electrostatic Discharge (ESD) can damage electronic com­ponents. To prevent damage to your system, it is important to handle it very carefully. The following measures
are generally sufficient to protect your equipment from ESD.

• Use a grounded wrist strap designed to prevent static discharge.
• Touch a grounded metal object before removing a component from the antistaticbag.

• Handle the RAID card by its edges only; do not touch its components, peripheral
chips, memory modules or gold contacts.

• When handling chips or modules, avoid touching their pins.
• Put the card and peripherals back into their antistatic bags when not in use.
1-2

General Safety Guidelines• Always disconnect power cables before installing or removing any components
from the computer, including the SAS-826EL series backplane.

• Make sure that the backplane is properly and securely on the motherboard toprevent damage to the system due to power outages.

1-1

SAS-826EL Series Backplane User's Guide

1-3

An Important Note to Users• All images and layouts shown in this user's guide are based upon the latest back-plane revision available at the time of publishing. The card you have received
may or may not look exactly the same as the graphics shown in this manual.

1-2Chapter 2: Backplane Jumpers, Connectors, LEDs and Pin Definitions

Chapter 2
Connectors, Jumpers and LEDs

Front Connectors

+

13

1

+

GND
GND
+12V

+
+

GND

+12V

+5V

GND

GND

+5V

14 14 15

1A

12V_LED 5V_LED

3
A

PRI_MODE4

C

A

C
1

WWN
C
A

2

17
16

19

+
GND

12

1
C

1

FANFAIL1
REMOTE_FAN_FAIL_SCOKET+18

BUZZER_ENB1

+12V

13

BAR CODE3

SEC_MODE4OVERHEATFAIL1

2

WWN

+

+

+

+5V

1

+

+

12 1

+

14

+

2-1

SAS826EL
REV 1.02

DESIGNED IN USA

15

15

Figure 2-1: SAS-826EL2 Connectors and Components

1. EPP connectors: J16 and J17

6. Primary SAS connectors: PRI_J0

2. Primary and secondary flash
chips

7. Primary SAS connectors: PRI_J1
8. Secondary SAS connectors:
SEC_J0 (not available in EL1
single port backplane)

3. Primary and secondary expanderchips
4. Power connectors: PWR0,
PWR1, and PWR3

9. Secondary SAS connectors:
SEC_J1 (not available in EL1
single port backplane)

5. Fan connectors: Fan1, Fan2, and
Fan3

WWN

1

2

WWN

1
1

C

A

1

3
A

GND
+12V

+
GND

+5V

+12V

GND

GND

17
SAS826EL
REV 1.02+5V

14 14 15

C

16

+

GND

A

1

+
+12V

C

2

+

2
1

+

GND

13

BAR CODE

3

+

+

+

+5V

1

+

+

1

+

+

+

14

DESIGNED IN USA

15

15

Figure 2-2: SAS-826EL1 Connectors and Components

2-1

SAS-826EL Series Backplane User's Guide

2-2

Front Connectors and Pin Definitions

1. EPP Ports
The EPP ports are used for manufacturer diagnostic purposes only.

2. Primary and Secondary Flash Chips
The Primary and Secondary Flash Chips enhance the backplane memory.

3. Primary and Secondary Expander Chips
This Primary and Secondary Expander Chips
allow the backplane to support dual port, cascading, and failover configurations.

4. Backplane Main Power Connectors
The 4-pin connectors, designated PWR0,
PWR1, and PWR3, provide power to the
backplane. See the table on the right for pin
definitions.

Backplane
Main Power
4-Pin Connector(PWR0, PWR1,
and PWR3)
Pin#            Definition     
1+12V2 and 3Ground4

5. Fan Connectors
The 3-pin connectors, designated Fan1, Fan2,
and Fan3, provide power to the fans.
See the table on the right for pin definitions.

6. - 9. SAS Ports
Primary and secondary SAS ports.

2-2

+5V

Fan Connectors(Fan1, Fan2, and Fan3)
Pin#             Definition     1Ground2+12V

3

TachometerChapter 2: Backplane Jumpers, Connectors, LEDs and Pin Definitions

2-3

Front Jumper Locations and Pin Definitions

PRI_Mode4
1

A

C

C

1

+

+

+
1

C

A

FANFAIL1
REMOTE_FAN_FAIL_SCOKET

+

C

GND

A

+

1

PRI_MODE43
A

12V_LED 5V_LED
C

A

C
1

WWN

2

2

OVERHEATFAIL1

+5V

+

+

+

1

2

+

BAR CODE3

SEC_MODE4

2

+

+
+

A

+

1

OVERHEATFAIL1

+

+5V

WWN

12V_LED 5V_LED

3

PRI_MODE4

Remote Fan
Fail Socket

+
C
A

+

1

A

FANFAIL1
REMOTE_FAN_FAIL_SCOKET

WWN

+

C

+

SEC_MODE4

SEC_Mode4

1

BAR CODE

3

1

+

GND
+12V

+

GND

+

BUZZER_ENB1

GND

SAS826EL

+
+12V

GND

GND

+5V

+12V

GND

GND

REV 1.02+5V

DESIGNED IN USA

+12V

+

+
Buzzer Enable
BUZZER_ENB1

DESIGNED IN USA

+12V

GND

GND

+5V

+12V

GND

GND

+5V

Figure 2-3: Front Jumpers

Explanation of Jumpers
To modify the operation of the backplane,
jumpers can be used to choose between
optional settings. Jumpers create shorts
between two pins to change the functionof the connector.   Pin 1 is identified witha square solder pad on the printed circuitboard. Note: On two pin jumpers, "Closed"means the jumper is on and "Open" means
the jumper is off the pins.

2-3

Connector
Pins

3

2

1

3

2

1

JumperSetting

SAS-826EL Series Backplane User's Guide

General Jumper Settings
JumperJumper Settings

Note

PRI_MODE4

1-2

Factory setting
do not change

SEC_MODE4

1-2

Factory setting
do not change

BUZZER_ENB1

Open: Disable
Closed: Enable

Buzzer disabled*
Buzzer enabled**The buzzer sound indicates that a condition requiring immediate attention has
occurred.
The buzzer alarm is triggered by the following conditions:
1. Hard drive failure
2. Fan failure
3. System temperature over 45º Celsius.

Socket Settings
Socket
REMOTE_FAN_FAIL_
SOCKET

Socket Setting

Note
Front panel fan fail indicator(optional)

Open

2-4

Chapter 2: Backplane Jumpers, Connectors, LEDs and Pin Definitions

Front LED Indicators

Fan Fail LED

12V_LED
5V_LEDC

1

1

A

FANFAIL1
REMOTE_FAN_FAIL_SCOKET

12V_LED 5V_LED

3

PRI_MODE4

A

A

C

C
1

+

WWN

Overheat LED

OVERHEATFAIL1

C
A

2

WWN

1

BAR CODE3

SEC_MODE4

1

A

PRI_MODE4

3
A

SAS826EL

12V_LED 5V_LED

GND

A

C

A

C

2

REV 1.02

OVERHEATFAIL1

C

+

1

1

WWN

+

+5V

+

C

FANFAIL1
REMOTE_FAN_FAIL_SCOKET

+

+

2

+

+

+

+

+

1

+

GND
+12V

+
+

BUZZER_ENB1

SAS826EL

+
+12V

GND

GND

+12V

+5V

GND

GND

DESIGNED IN USA+5V

REV 1.02

DESIGNED IN USA

Figure 2-4: Front LEDs

Backplane LEDs
LED

State

Specification

OVERHEATFAIL1

ON

Overheat or drive failure

FANFAIL1

ON

Failure in system fans

5V

OFF

Backplane power failure. Light is on
during normal operation.

12V

OFF

Backplane power failure. Light is on
during normal operation.

2-5

SAS-826EL Series Backplane User's Guide

2-4

Rear Connectors and LED Indicators

SAS Drive
NumberRear
Connector

SAS Drive
NumberSAS #0SAS HDD #0

SAS #6

SAS HDD #6

SAS #1

SAS HDD #1

SAS #7

SAS HDD #7

SAS #2

SAS HDD #2

SAS #8SAS HDD #8

SAS #3

SAS HDD #3

SAS #9SAS HDD #9

SAS #4

SAS HDD #4

SAS #10

SAS HDD #10

SAS #5

SAS HDD #5

SAS #11

SAS HDD #11

Rear LED Indicators
Hard Drive Activity

Failure LED

SAS #0

Rear LED

ACT #0FAIL #0

SAS #1

ACT #1

FAIL #1

SAS #2

ACT #2FAIL #2

SAS #3

ACT #3

FAIL #3

SAS #4

ACT #4

FAIL #4

SAS #5

ACT #5

FAIL #5

SAS #6

ACT #6

FAIL #6

SAS #7

ACT #7

FAIL #7

SAS #8

ACT #8FAIL #8

SAS #9

ACT #9FAIL #9SAS #10

ACT #10FAIL #10

SAS #11

ACT #11

FAIL #11

2-6

A

Rear
Connector

AC

Rear SAS Connectors

C

Figure 2-5: Rear Connectors and LEDs

A

ACT#9
FAIL#9AC

A

SAS #9
J9

C

C
A

A

A

AC

A

ACT#10FAIL#10AC

AC
C

SAS #10
J10

ACT#11
FAIL#11

C

C

ACT#7
FAIL#7
ACT#6
FAIL#6

SAS #11
J11

A

C

A

SAS #6J6AC

A

SAS #7
J7

C

AC

AC

ACT#3
FAIL#3

SAS #3J3

SAS #8ACT#8FAIL#8C

C

SAS #4
J4

A

A

ACT#4
FAIL#4AC

AC

SAS #5
J5

C

C

ACT#0
FAIL#0A

SAS #0J0AC

SAS #1
J1

ACT#1
FAIL#1

ACT#5
FAIL#5C

SAS #2J2

ACT#2
FAIL#2

Chapter 3: Dual Port and Cascading Configurations

Chapter 3
Dual Port and Cascading Configurations

3-1

Single and Dual Port Expanders
Single Ports

SAS-826EL1 backplanes have a single-port expander that access all 12 drives andsupports cascading.

Dual Ports
SAS-826EL2 backplanes have dual-port expanders that access all 12
drives. These dual-port expanders support cascading, failover, and recovery.
Warning: The SAS 826EL2 backplane's J0 and J1 SAS ports are reversed in theSecondary Expander Port B with J0 on top and J1 on the bottom.
To lower backplane incascaded system

WWN+

BAR CODE

3

1

C

1

1

A

3
A

C

A

C
1

WWN

2

GND

+

+

2

+

+5V

+

+

1

+

+

+

SAS-826EL1 Single-Port Backplane

+

GND

J1

+12V

+
+

J0

+
+12V

GND

GND

+12V

+5V

GND

GND

+5V

WWN

1

BAR CODE3

SEC_MODE4

1

+

+

GND
+12V

+
+5V

3
A

12V_LED 5V_LED
C

A

C

2

+

GND

PRI_MODE4

+

GND

+
GND

1

OVERHEATFAIL1

+5V

C

J1

J0
+12V

A

1

WWN
A

BUZZER_ENB1

C

FANFAIL1
REMOTE_FAN_FAIL_SCOKET

+

+

+

+

To lower backplane incascaded system

+

+

+

From HBA or higher
backplane

2

REV 1.02

From HBA or higher
backplane

SAS-826EL2 Dual-Port Backplane1

SAS826EL

DESIGNED IN USA

+12V

GND

GND

+5V

J0

J1
To lower backplane incascaded system

Port B
Secondary Ports Expander

REV 1.02

From HBA or higher
backplane
Port A
Primary Ports Expander 1

Figure 3-1: Single and Dual Port Expanders

3-1

SAS826EL

DESIGNED IN USA

SAS-826EL Series Backplane User's Guide

3-2

FailoverThe SAS-826EL2 Backplane has two expanders which allow effective failover andrecovery.

Single Host Bus Adapter

SAS HBAIn a single host bus configuration, thebackplane connects to one Host Bus
Adapter (HBA).

Port B
Expander 2Single Host Bus Adapter Failover

Port A
Expander 1

SAS HBA

If the expander or data path in PortA fails, the system will automatically
fail over to Port B.

Port B
Expander 2Figure 3-2: Single and Dual Port Expanders

3-2

Port A
Expander 1Chapter 3: Dual Port and Cascading Configurations

3-3

Failover with RAID Cards and Multiple HBAs

The SAS-836EL backplane may be configured for failover with multiple
HBAs using either RAID controllers or HBAs to acheive failover protection.
RAID Controllers: If RAID controllers are used, then the failover is accomplished through port failover on the same RAID card.
HBAs: If multiple HBAs are used to achieve failover protection and loadbalancing, Linux MPIO software must be installed and correctly configured to perform the load balancing and failover tasks.
Dual Host Bus Adapter

SAS HBAIn a Dual Host Bus configuration, thebackplane connects to two Host Bus
Adapters.

SAS HBAPort B
Expander 2Dual Host Bus Adapter Failover

Port A
Expander 1

SAS HBA

If the expander or data path in PortA fails, the system will automatically
fail over to Port B. This maintains afull connection to all drives.

SAS HBAPort B
Expander 2Port A
Expander 1

Figure 3-3: Single and Dual Port Expanders!

IMPORTANT: For RAID controllers, redundancy is achieved
through port failover. For multiple HBAs MPIO software isrequired to achieve failover protection.

3-3

SAS-826EL Series Backplane User's Guide

3-4

Cables and Chassis Power Card
Chassis Power Card

In a cascaded configuration, the first chassis includes a motherboard and, at least
one, Host Bus Adapter. Other servers in this enclosed system include a power card.
This section describes the supported power card for the 826 backplane system.
For more information, see the PCC-JBPWR2 power card manual. This manual
can be found at the http://www.supermicro.com or as an appendix in the SC826
chassis manual.

A
A

A

JBPWR2 REV 1.00

Figure 3-4: The JBPWR2 Power Card

Power Card
Part Number

Part Type

Where Used

CSE-PTJBOD-CB1

Power Card

Allows the chassis to be in a
JBOD (Just a Bunch of Drives)
system.

3-4

Chapter 3: Dual Port and Cascading Configurations

Connecting an Internal Host Bus Adapter to the
Backplane
The following section lists the most common cables used to connect the HBA to
the backplane.

Single Internal Host Bus Adapter

HBA(Host Bus Adapter)

Dual Internal Host Bus Adapter

HBA (Host Bus Adapter)
HBA (Host Bus Adapter)
Figure 3-5: Connecting to Single and Dual Internal HBAs
IMPORTANT: See Section 3-3 of this manual, Failover with RAID Cards and Multiple
HBAs for important information on supported configurations.

3-5

SAS-826EL Series Backplane User's Guide

Supported Internal HBA to Backplane Cables
Use the following listed cables to create connections between the internal HBA andbackplane. The cables required depend on the HBA connector.
Cable Name: IPASS TO 4-LANE
Part #: CBL-0117

Length: 46 cm (18 inches)

Description: This cable has one SFF-8484 (32 pin) connector on one end andipass (SFF-8087/mini-sas) connector (36 pins) at the other. This cable connects
from the HBA to the 826 EL backplane.

Cable Name: SFF-8087 (mini SAS) TO SFF-8087 (mini SAS)
Part #: CBL-0108L-02

Length: 39 cm (15 inches)Part #: CBL-0109L-02

Length: 22 cm (9 inches)Part #: CBL-0110L-02

Length: 18 cm (7 inches)

Description: This cable has an iPass (SFF-8087/mini-sas) connector (36 pins) ateach end. It connects from the HBA to the 826 EL backplane.

3-6Chapter 3: Dual Port and Cascading Configurations

Connecting an External Host Bus Adapter to the
Backplane
This backplane supports external HBAs. In this configuration, the HBA and the
backplane are in different physical chassis. This allows a JBOD (Just a Bunch Of
Drives) configuration from an existing system.

Single External Host Bus Adapter

HBA(Host Bus Adapter)

Power Card

CBL-0200L
External HBA Cable

Dual External Host Bus Adapter

HBA(Host Bus Adapter)

HBA(Host Bus Adapter)

Power Card

CBL-0200L
External HBA Cables
Figure 3-6: Connecting Single and Dual External HBAs
IMPORTANT: See Section 3-3 of this manual, Failover with RAID Cards and Multiple
HBAs for important information on supported configurations.

3-7

SAS-826EL Series Backplane User's Guide

Supported External HBA to Backplane Cable
Use the following cable if your external HBA has an Infiniband connector.

Figure 3-5: The CBL-0200L Cable
Cable Name: SAS InfiniBand to Mini SAS X4 1M cable, PBF
Part #: CBL-0200L

Length: 1 meter

Description: This cable has an Infiniband connector (SFF-8470) on one end andan SFF-8088-1X (26-pins) at the other end.

3-8

Chapter 3: Dual Port and Cascading Configurations

Connecting Multiple Backplanes in a Single Channel
Environment
This section describes the cables used when cascading from a single HBA. These
connections use CBL-0167L internal cables and CBL-0166L external cables.

Single HBA Configuration

CBL-0167L
with Single Port Assembly(internal cable)

HBA(Host Bus Adapter)

CBL-0166L(external cable)

Power Card

Figure 3-7: Single HBA Configuration

3-9

SAS-826EL Series Backplane User's Guide

Single HBA Configuration Cables
Single Port Cable Assembly

Figure 3-8: The CBL-0167L Cable
Cable Name: SAS EL2/EL1 Backplane Cable (Internal) w/ 2-port Cascading Cable,
68 cm
Part #: CBL-0167L (SFF-8087 to SFF-8088 x1)
Ports: Single
Placement: Internal cable
Description: Internal cable. Connects the backplane to the Host Bus Adapter(HBA) or external port. Used in single port environments.

Figure 3-9 The CBL-0166L Cable
Cable Name: SAS EL2/EL1 Cascading Cable (External), 68cm
Part #: CBL-0166L (SFF-8088 1x to SFF-8088 x1)
Ports: Single or Dual
Placement: External cable
Description: External cascading cable. Connects ports between servers. With
most connectors, use one cable for single port connections and two cables for dual
port connections.

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Chapter 3: Dual Port and Cascading Configurations

Connecting Multiple Backplanes in a Dual Channel
Environment
This section describes the cables used when cascading from a single HBA. These
connections use CBL-0168L internal cables and CBL-0166L external cables.

CBL-0168L
with Single Port Assembly(internal cable)

HBA (Host Bus Adapter)
HBA (Host Bus Adapter)

CBL-0166L(external cable)

Power Card

Figure 3-10: Connecting Multiple Backplanes when using Dual Channels

IMPORTANT: See Section 3-3 of this manual, Failover with RAID Cards and Multiple
HBAs for important information on supported configurations.

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SAS-826EL Series Backplane User's Guide

Dual HBA Configuration Cables
Dual Port Cable
Assembly

Figure 3-11: The CBL-0168L Cable
Cable Name: SAS Dual-port Cable Assembly, 68/76cm
Part #: CBL-0168L (SFF-8087 to SFF-8088 x2
Ports: Dual
Placement: Internal cable
Description: Internal cascading cable. Connects the backplane to the Host Bus
Adapter (HBA) or external port. Used in Dual port environments.

Figure 3-12: The CBL-0166L Cable
Cable Name: SAS EL2/EL1 Cascading Cable (External), 68cm
Part #: CBL-0166L (SFF-8088 x1 to SFF-8088 x1)
Ports: Single or Dual
Placement: External cable
Description: External cascading cable. Connects ports between servers. Use one
cable for single port connections and two cables for dual port connections.

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Chapter 3: Dual Port and Cascading Configurations

3-5

Supported Cascading Configuration

Cascading allows the system to access data at a faster rate by allowing several
backplanes to share resources to reduce latency time.
The first backplane in a cascaded system requires a motherboard and HBA. Other
servers require a power control card, not a motherboard and HBA. For more information, see the 826 Chassis Manual.

CBL-0167L
with Single Port Assembly(internal cable)

HBA(Host Bus Adapter)

CBL-0166L(external cable)

Power Card

Power Card
Other Considerations:• Cascading supports up to 122 hard drives• Use the same cables for all single port configurations• See page 3-4 if your HBA is external to your backplane.
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SAS-826EL Series Backplane User's Guide

Server System with Dual SAS HBA and Cascading
Configuration

CBL-0168L
with Dual Port Assembly(internal cable)

HBA (Host Bus Adapter)
HBA (Host Bus Adapter)

CBL-0166L(external cable)

Power Card

Power Card

IMPORTANT: See Section 3-3 of this manual, Failover with RAID Cards and Multiple
HBAs for important information on supported configurations.

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Chapter 3: Dual Port and Cascading Configurations

Notes

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SAS-826EL Series Backplane User's Guide

Disclaimer (cont.)
The products sold by Supermicro are not intended for and will not be used in life support systems, medical equipment, nuclear facilities or systems, aircraft, aircraft devices,
aircraft/emergency communication devices or other critical systems whose failure to perform be reasonably expected to result in significant injury or loss of life or catastrophic
property damage. Accordingly, Supermicro disclaims any and all liability, and shouldbuyer use or sell such products for use in such ultra-hazardous applications, it does soentirely at its own risk. Furthermore, buyer agrees to fully indemnify, defend and holdSupermicro harmless for and against any and all claims, demands, actions, litigation,and proceedings of any kind arising out of or related to such ultra-hazardous use orsale.

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