Supero Supero SAS-846EL User manual

Rev. 1.0d
SAS-846EL BACKPLANE
USER'S GUIDE
SEC_J2
SEC_J2
SEC_J1
SEC_J1
SEC_J0
SEC_J0
PRI_J2
PRI_J2
PRI_J1
PRI_J1
PRI_J0
PRI_J0
EC8
EC8
EC22
EC22
EC20
EC20
S_J1
S_J1
P_J1
P_J1
L1
L1
SEC_MODE1
SEC_MODE1
PRI_MODE1
PRI_MODE1
SEC_IPMI1
SEC_IPMI1
PRI_IPMI1
PRI_IPMI1
PRI_I2C1
PRI_I2C1
SEC_I2C1
SEC_I2C1
J25
J25
SEC_FLASH1
SEC_FLASH1
PRI_FLASH1
PRI_FLASH1
PRI_EXP1
PRI_EXP1
SEC_EXP1
SEC_EXP1
FAN2
FAN2
FAN1
FAN1
R227
R227
BUZZER1
BUZZER1
5V_LED1
5V_LED1
OVERHEATFAIL1
OVERHEATFAIL1
FANFAIL1
FANFAIL1
BUZZER_ENB1
BUZZER_ENB1
REMOTE_FAN_FAIL_SOCKET1
REMOTE_FAN_FAIL_SOCKET1
PWR6
PWR6
PWR4
PWR4
PWR5
PWR5
PWR3
PWR3
PWR2
PWR2
PWR1
PWR1
BAR CODE
BAR CODE
+
+
+
+
2
2
A
A
C
C
A
A
C
C
A
A
C
C
A
A
C
C
+5V
+5V
+12V
+12V
GND
GND
GND
GND
+5V
+5V
+12V
+12V
GND
GND
GND
GND
+5V
+5V
+12V
+12V
GND
GND
GND
GND
+5V
+5V
+12V
+12V
GND
GND
GND
GND
+5V
+5V
+12V
+12V
GND
GND
GND
GND
+5V
+5V
+12V
+12V
GND
GND
GND
GND
WWN
WWN
WWN
WWN
DESIGNED IN USA
DESIGNED IN USA
REV 1.01
REV 1.01
SAS846EL2
SAS846EL2
1J24
1J24
2
2
SEC_J2 SEC_J1 SEC_J0 PRI_J2 PRI_J1 PRI_J0
EC8
EC22
EC20
S_J1
P_J1
L1
SEC_MODE1
PRI_MODE1
SEC_IPMI1
PRI_IPMI1
PRI_I2C1
SEC_I2C1
J25
SEC_FLASH1
PRI_FLASH1
PRI_EXP1
SEC_EXP1
FAN2 FAN1
R199
R227
R210
BUZZER1
5V_LED1
OVERHEATFAIL1
FANFAIL1
BUZZER_ENB1 REMOTE_FAN_FAIL_SOCKET1
PWR6 PWR4
PWR5 PWR3
PWR2
PWR1
BAR CODE
+
+
2
AC AC
ACAC
+5V
+12V GND
GND
+5V+12V GNDGND
+5V+12V GNDGND +5V
+12V GND GND +5V
+12V GND GND +5V+12V GND GND
WWN
WWN
DESIGNED IN USA
REV 1.01
SAS846EL2
SUPER ®

ii
SAS-846EL Backplane User's Guide
Manual Revision 1.0d
Release Date: January 6, 2010
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 this
manual, please see our web site at www.supermicro.com.
Super Micro Computer, Inc. ("Supermicro") reserves the right to make changes to the product
described in this manual at any time and without notice. This product, including software, if any,
and documentation may not, in whole or in part, be copied, photocopied, reproduced, translated or
reduced to any medium or machine without prior written consent.
IN NO EVENT WILLSUPERMICRO 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 DATASTORED OR USED WITHTHE 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 shall
be 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 this
product may expose you to lead, a chemical known to
the State of California to cause birth defects and other
reproductive harm.
Unless you request and receive written permission from Super Micro Computer, Inc., you may not
copy 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 mark
holders.
Copyright © 2010 by Super Micro Computer, Inc.
All rights reserved.
Printed in the United States of America

iii
Safety Information and Technical Specifications
Table of Contents
Contacting Supermicro........................................................................................v
Returning Merchandise for Service....................................................................vi
Chapter 1 Safety Guidelines
1-1 ESD Safety Guidelines ................................................................................... 1-1
1-2 General Safety Guidelines.............................................................................. 1-1
1-3 An Important Note to Users............................................................................ 1-2
1-4 Introduction to the SAS-846EL Backplane......................................................1-2
Chapter 2 Jumper Settings and Pin Definitions
2-1 Front Connectors and Jumpers ......................................................................2-1
2-2 Front Connector and Pin Definitions............................................................... 2-2
2-3 Front Jumper Locations and Pin Definitions...................................................2-4
Explanation of Jumpers ..................................................................................2-4
2-4 Rear Connectors and LED Indicators............................................................. 2-6
Chapter 3 Dual Port and Cascading Configurations
3-1 Single and Dual Port Expanders.....................................................................3-1
Single Ports.....................................................................................................3-1
Dual Ports ....................................................................................................... 3-1
3-2 Failover............................................................................................................ 3-2
Single Host Bus Adapter................................................................................. 3-2
Single Host Bus Adapter Failover................................................................... 3-2
Dual Host Bus Adapter ..................................................................................3-2
Dual Host Bus Adapter Failover...................................................................... 3-2
3-3 Chassis Power Card and Support Cables......................................................3-3
Chassis Power Card....................................................................................... 3-3
Connecting an Internal Host Bus Adapter to the Backplane .........................3-4
Supported Internal HBA Cables...................................................................... 3-4
Connecting an External Host Bus Adapter to the Backplane ........................ 3-6
Single External Host Bus Adapter ................................................................. 3-6
Dual External Host Bus Adapter .................................................................... 3-6
Supported External HBA to Backplane Cable ................................................3-7
Connecting Multiple Backplanes in a Single Channel Environment............... 3-8
Single HBA Configuration Cables...................................................................3-9
Connecting Multiple Backplanes in a Dual Channel Environment ...............3-10
Dual HBA Configuration Cables.....................................................................3-11
3-4 Supported Cascading Configurations ........................................................... 3-12

iv
SAS-846EL Backplane User's Guide
Server System with Single SAS HBA...........................................................3-13
Dual SAS HBA and Cascaded Configuration...............................................3-14
Dual SAS HBA and Cascaded Configuration with Branching...................... 3-15

v
Safety Information and Technical Specifications
Contacting Supermicro
Headquarters
Address: Super Micro Computer, Inc.
980 Rock Ave.
San Jose, CA 95131 U.S.A.
Tel: [phone]
Fax: [phone]
Email: [email protected] (General Information)
[email protected] (Technical Support)
Web Site: www.supermicro.com
Europe
Address: Super Micro Computer B.V.
Het Sterrenbeeld 28, 5215 ML
's-Hertogenbosch, The Netherlands
Tel: [phone]
Fax: [phone]
Email: [email protected] (General Information)
[email protected] (Technical Support)
[email protected] (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: [phone]
Fax: [phone]
Web Site: www.supermicro.com.tw
Technical Support:
Email: [email protected]
Tel: [phone]

vi
SAS-846EL Backplane User's Guide
Returning Merchandise for Service
A receipt or copy of your invoice marked with the date of purchase is required be-
fore any warranty service will be rendered. You can obtain service by calling your
vendor for a Returned Merchandise Authorization (RMA) number. When returning
to the manufacturer, the RMA number should be prominently displayed on the
outside of the shipping carton, and mailed prepaid or hand-carried. Shipping and
handling 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 the
original 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 enough
packaging 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 in-
curred 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.

1-1
Safety Information and Technical Specifications
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
ElectrotaticDischarge(ESD)candamageelectroniccomponents.Topreventdamage
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 antistatic•
bag.
Handle the backplane 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 backplane 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 backplane.
Disconnect the power cable before installing or removing any cables from the
•
backplane.
Make sure that the backplane is securely and properly installed on the mother-
•
board to prevent damage to the system due to power shortage.

1-2
SAS-846EL 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 PCB
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.
1-4 Introduction to the SAS-846EL Backplane
The SAS-846ELbackplane has been designed to utilize the most up-to-date technol-
ogy available, providing your system with reliable, high-quality performance.
This manual reflects SAS-846ELRevision 1.01, the most current release available at
the time of publication.Always refer to the Supermicro Web site at www.supermicro.
com for the latest updates, compatible parts and supported configurations.

2-1
Safety Information and Technical Specifications
SEC_J2
SEC_J2
SEC_J1
SEC_J1
SEC_J0
SEC_J0
PRI_J2
PRI_J2
PRI_J1
PRI_J1
PRI_J0
PRI_J0
EC8
EC8
EC22
EC22
EC20
EC20
S_J1
S_J1
P_J1
P_J1
L1
L1
SEC_MODE1
SEC_MODE1
PRI_MODE1
PRI_MODE1
SEC_IPMI1
SEC_IPMI1
PRI_IPMI1
PRI_IPMI1
PRI_I2C1
PRI_I2C1
SEC_I2C1
SEC_I2C1
J25
J25
SEC_FLASH1
SEC_FLASH1
PRI_FLASH1
PRI_FLASH1
PRI_EXP1
PRI_EXP1
SEC_EXP1
SEC_EXP1
FAN2
FAN2
FAN1
FAN1
R227
R227
BUZZER1
BUZZER1
5V_LED1
5V_LED1
OVERHEATFAIL1
OVERHEATFAIL1
FANFAIL1
FANFAIL1
BUZZER_ENB1
BUZZER_ENB1
REMOTE_FAN_FAIL_SOCKET1
REMOTE_FAN_FAIL_SOCKET1
PWR6
PWR6
PWR4
PWR4
PWR5
PWR5
PWR3
PWR3
PWR2
PWR2
PWR1
PWR1
BAR CODE
BAR CODE
+
+
+
+
2
2
A
A
C
C
A
A
C
C
A
A
C
C
A
A
C
C
+5V
+5V
+12V
+12V
GND
GND
GND
GND
+5V
+5V
+12V
+12V
GND
GND
GND
GND
+5V
+5V
+12V
+12V
GND
GND
GND
GND
+5V
+5V
+12V
+12V
GND
GND
GND
GND
+5V
+5V
+12V
+12V
GND
GND
GND
GND
+5V
+5V
+12V
+12V
GND
GND
GND
GND
WWN
WWN
WWN
WWN
DESIGNED IN USA
DESIGNED IN USA
REV 1.01
REV 1.01
SAS846EL2
SAS846EL2
1J24
1J24
2
2
SEC_J2 SEC_J1 SEC_J0 PRI_J2 PRI_J1 PRI_J0
EC8
EC22
EC20
S_J1
P_J1
L1
SEC_MODE1
PRI_MODE1
SEC_IPMI1
PRI_IPMI1
PRI_I2C1
SEC_I2C1
J25
SEC_FLASH1
PRI_FLASH1
PRI_EXP1
SEC_EXP1
FAN2 FAN1
R199
R227
R210
BUZZER1
5V_LED1
OVERHEATFAIL1
FANFAIL1
BUZZER_ENB1 REMOTE_FAN_FAIL_SOCKET1
PWR6 PWR4
PWR5 PWR3
PWR2
PWR1
BAR CODE
+
+
2
AC AC
ACAC
+5V
+12V GND
GND
+5V+12V GNDGND
+5V+12V GNDGND +5V
+12V GND GND +5V
+12V GND GND +5V+12V GND GND
WWN
WWN
DESIGNED IN USA
REV 1.01
SAS846EL2
Chapter 2
Jumper Settings and Pin Definitions
2-1 Front Connectors and Jumpers
Front Connectors
1. and 2. Primary and secondary I2C connectors (optional)
3. Power connectors: PWR1, PWR2, PWR3, PWR4, PWR5, and PWR6
4. Primary and secondary flash chip
5. Primary and secondary expander chip
6. EPP connectors: J24 and J25
7. Fan connectors: Fan1, Fan2, and Fan3
8. SAS connector: PRI_J0
9. SAS connector: PRI_J1
10. SAS connector: PRI_J2
11. SAS connectors SEC_J0 (not available in EL1 single port backplane)
12. SAS connector: SEC_J1 (not available in EL1 single port backplane)
13. SAS connector: SEC_J2 (not available in EL1 single port backplane)
Figure 2-1: Front Connectors
1
11 1
1
91 8
1
7
1
7
1
7
1
6
1
61
5
1
51
4
1
4
1
3
1
3
1
3
1
31 3
1
3
1
21 2
1
10
1
12
1
13 1
11

2-2
SAS-846EL Backplane User's Guide
1. and 2. Optional Primary and Secondary
I2C Connectors
TheoptionalI2Cconnectorsareconnectedto
the CSE-PTJBOD-CB2 board and are used
to monitor the power supply status and to
control the fans. See the table on the right
for pin definitions.
I2C Connector
Pin Definitions
Pin# Definition
1 Data
2 Ground
3 Clock
4 No Connection
2-2 Front Connector and Pin Definitions
Backplane
Main Power
4-Pin Connector
Pin# Definition
1 +12V
2 and 3 Ground
4 +5V
3. Backplane Main Power Connectors
The 4-pin connectors, designated PWR1,
PWR2, PWR3, PWR4, PWR5, and PWR6,
provide power to the backplane. See the
table on the right for pin definitions.
5. Primary and Secondary Expander Chips
This primary and secondary expander chips
allow the backplane to support dual ports,
cascading, and failover.
4. Primary and Secondary Flash Chips
The primary and secondary flash chips
enhance the backplane memory.
6. EPP Ports
The EPP ports are used for manufacturer
diagnostic purposes only.

2-3
Safety Information and Technical Specifications
7. 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.
Fan Connectors
Pin# Definition
1 Ground
2 +12V
3 Tachometer
8 - 13. SAS Ports
The primary and secondary sets of SAS
ports provide expander features including
cascading and failover From right to left
the ports are primary 1/2/3 and secondary
1/2/3.

2-4
SAS-846EL Backplane User's Guide
2-3 Front Jumper Locations and Pin Definitions
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 function
of the connector. Pin 1 is identified with
a square solder pad on the printed circuit
board. Note: On two pin jumpers, "Closed"
means the jumper is on and "Open" means
the jumper is off the pins.
Connector
Pins
Jumper
Setting
3 2 1
3 2 1
SEC_J2
SEC_J2
SEC_J1
SEC_J1
SEC_J0
SEC_J0
PRI_J2
PRI_J2
PRI_J1
PRI_J1
PRI_J0
PRI_J0
EC8
EC8
EC22
EC22
EC20
EC20
S_J1
S_J1
P_J1
P_J1
L1
L1
SEC_MODE1
SEC_MODE1
PRI_MODE1
PRI_MODE1
SEC_IPMI1
SEC_IPMI1
PRI_IPMI1
PRI_IPMI1
PRI_I2C1
PRI_I2C1
SEC_I2C1
SEC_I2C1
J25
J25
SEC_FLASH1
SEC_FLASH1
PRI_FLASH1
PRI_FLASH1
PRI_EXP1
PRI_EXP1
SEC_EXP1
SEC_EXP1
FAN2
FAN2
FAN1
FAN1
R227
R227
BUZZER1
BUZZER1
5V_LED1
5V_LED1
OVERHEATFAIL1
OVERHEATFAIL1
FANFAIL1
FANFAIL1
BUZZER_ENB1
BUZZER_ENB1
REMOTE_FAN_FAIL_SOCKET1
REMOTE_FAN_FAIL_SOCKET1
PWR6
PWR6
PWR4
PWR4
PWR5
PWR5
PWR3
PWR3
PWR2
PWR2
PWR1
PWR1
BAR CODE
BAR CODE
+
+
+
+
2
2
A
A
C
C
A
A
C
C
A
A
C
C
A
A
C
C
+5V
+5V
+12V
+12V
GND
GND
GND
GND
+5V
+5V
+12V
+12V
GND
GND
GND
GND
+5V
+5V
+12V
+12V
GND
GND
GND
GND
+5V
+5V
+12V
+12V
GND
GND
GND
GND
+5V
+5V
+12V
+12V
GND
GND
GND
GND
+5V
+5V
+12V
+12V
GND
GND
GND
GND
WWN
WWN
WWN
WWN
DESIGNED IN USA
DESIGNED IN USA
REV 1.01
REV 1.01
SAS846EL2
SAS846EL2
1J24
1J24
2
2
SEC_J2 SEC_J1 SEC_J0 PRI_J2 PRI_J1 PRI_J0
EC8
EC22
EC20
S_J1
P_J1
L1
SEC_MODE1
PRI_MODE1
SEC_IPMI1
PRI_IPMI1
PRI_I2C1
SEC_I2C1
J25
SEC_FLASH1
PRI_FLASH1
PRI_EXP1
SEC_EXP1
FAN2 FAN1
R199
R227
R210
BUZZER1
5V_LED1
OVERHEATFAIL1
FANFAIL1
BUZZER_ENB1 REMOTE_FAN_FAIL_SOCKET1
PWR6 PWR4
PWR5 PWR3
PWR2
PWR1
BAR CODE
+
+
2
AC AC
ACAC
+5V
+12V GND
GND
+5V+12V GNDGND
+5V+12V GNDGND +5V
+12V GND GND +5V
+12V GND GND +5V+12V GND GND
WWN
WWN
DESIGNED IN USA
REV 1.01
SAS846EL2
SEC_MODE1
PRI_
Mode1
REMOTE_FAN_FAIL_SOCKET1
BUZZER_ENB1
OVERHEATFAIL1
FANFAIL1
Figure 2-2: Front Jumper Locations and Pin Defimitions

2-5
Safety Information and Technical Specifications
Socket Settings
Socket Socket Setting Note
REMOTE_FAN_FAIL_
SOCKET Connected Front Panel Fan Fail indicator (Optional)
General Jumper Settings
Jumper Jumper Settings Note
PRI_MODE1 1-2 Factory Setting
Do not change
SEC_MODE1 1-2 Factory Setting
Do not change
BUZZER_ENB1 Open: Disable
Closed: Enable Buzzer Enable*
Front Panel LEDs
LED State Specification
OVERHEATFAIL1 ON Overheat/Drive Failure LED Indicator
(Red light: flashing, Buzzer: On)
FANFAIL1 ON Failure in Fan #1
*The buzzer sound indicates that a condition requiring immediate attention has
occurred.
The buzzer alarm is triggered by the following conditions:
Hard drive failure1.
Fan failure2.
System temperature over 45º Celsius.3.

2-6
SAS-846EL Backplane User's Guide
R567
TP5
TP26
TP8 TP9
F5
F6
L166
L167
C507
C531
C380
C381
C382
C383
C384
C385
C386
C393
C404
C405
C407
C408
C409
C410
C428
C429
C430
C431
C432
C433
C508
C509
C510
C511
C512
C513
C514
C532
C533
C534
C535
C536
C537
C538
C555
C556
C557
C558
C559
C560
C561
C562
C434
C435
C500
C524
C525 C526
C527
C501
C502
C503
C505 C506
C518
C100
C103
C331 C332
C354
C355
C356
C357 C358
C364
C365
C366
C367
C368
C369
C370
C371 C372
C373 C374
C375
C376
C377
C378
C387
C389
C390
C391
C392
C394 C395
C396
C397
C399
C400
C401
C402
C403
C412
C413
C414
C415
C416
C417
C418
C419
C420
C421
C422
C423
C424 C425
C426 C427
C469
C470
C471
C472
C473
C474
C475
C476
C477
C478
C480
C481
C482
C483
C484
C485
C486
C487
C488
C490
C491 C492
C493 C494
C495
C496 C497
C498
C499
C504
C515
C516 C517
C519
C520
C521
C522
C523
C539
C540
C541
C542
C543 C544
C545 C546
C547
C548 C549
C550
C551
C552
C553 C554
C94
C97
C379
C530 C529
C528
C40
C48
C19 C20
C23
C26 C28
C29 C30
C31
C36
C37
C38
C39
C41
C42 C43 C44
C45
C46
C47
C5 C6
C35
C33
C32
C27
C24
C22 C14
PRI_SRAM2
PRI_SRAM1
SEC_SRAM2
R253
R251
R252
R250
R100
R101
R102
R103
R104 R105
R106
R107
R108
R109
R110
R220
R221
R224
R225
R230
R231 R232
R233
R234
R235
R236
R237
R238
R239
R240
R241
R242
R243 R244
R245
R246
R247
R248
R249
R87 R88 R89R90
R91R92
R93
R94
R95
R96
R97
R98
R99
RB1
D73
D72
D71
D70
D69
D67
D62
D63
D64
D65
D66
D33
D34
D35
D36
D37
D68
D32
D31
D30
D29
D28
D27
D26
ACT16
ACT17
ACT18
ACT19
ACT20
ACT21
ACT22
ACT23
FAIL18
FAIL19
FAIL20
FAIL21
FAIL22
FAIL23
FAIL16
FAIL17
ACT6
ACT0
ACT1
ACT2ACT3
ACT4
ACT5
ACT7
ACT8
ACT9
ACT10
ACT11
ACT12
ACT13
ACT14
ACT15
FAIL4
FAIL5
FAIL6
FAIL7
FAIL8
FAIL9
FAIL10FAIL11
FAIL12
FAIL13
FAIL14
FAIL0FAIL1FAIL2FAIL3
FAIL15
J23
J22
J21
J18
J19
J20
J17
J16
J13
J3
J12
J15
J14
J2
J6
J7
J11
J1
J8
J4 J10
J9
J0
J5
6 13
18
19
24
6
7 12
13
18
1924
A
CAC
A
CACACAC
A
CAC
A
C
AC
A
CAC
A
CAC
A
C
A
C
A
C
A
C
AC
A
CA
C
A
C
AC
A
C
A
C
A
C
A
C
A
C
AC
A
C
A
C
A
C
AC
A
C
A
C
A
C
AC
A
CACA
C
A
CA
C
A
C
A
C
AC
A
C
A
C
AC
ACT#3 FAIL#3
ACT#7 FAIL#7
#1
SAS
#0
SAS
#13
SAS
SAS
#12
ACT#12 FAIL#12
FAIL#13ACT#13
ACT#18 FAIL#18
ACT#19 FAIL#19
SAS
#18
SAS
#19
ACT#23 FAIL#23
ACT#22 FAIL#22
ACT#21 FAIL#21 FAIL#20ACT#20
FAIL#11ACT#11 FAIL#16ACT#16 FAIL#15
ACT#15
FAIL#14
ACT#14
FAIL#10ACT#10
ACT#11 FAIL#11 ACT#9 FAIL#9
#23
#22
#21
#20
#14
#15
#16
#17
#10
#9
#5
#4
#3
#2
SAS
SAS
SAS
SAS
SAS
SAS
SAS
SAS
SAS
SAS
SAS
SAS
SAS
SAS
FAIL#5ACT#5
ACT#4 FAIL#4
ACT#0 FAIL#0
2-4 Rear Connectors and LED Indicators
Rear SAS/SATA Connectors
Rear
Connector SAS Drive Number Rear Connector SAS Drive Number
SAS #0 SAS/SATA HDD #0 SAS #12 SAS/SATA HDD #12
SAS #1 SAS/SATA HDD #1 SAS #13 SAS/SATA HDD #13
SAS #2 SAS/SATA HDD #2 SAS #14 SAS/SATA HDD #14
SAS #3 SAS/SATA HDD #3 SAS #15 SAS/SATA HDD #15
SAS #4 SAS/SATA HDD #4 SAS #16 SAS/SATA HDD #16
SAS #5 SAS/SATA HDD #5 SAS #17 SAS/SATA HDD #17
SAS #6 SAS/SATA HDD #6 SAS #18 SAS/SATA HDD #18
SAS #7 SAS/SATA HDD #7 SAS #19 SAS/SATA HDD #19
SAS #8 SAS/SATA HDD #8 SAS #20 SAS/SATA HDD #20
SAS #9 SAS/SATA HDD #9 SAS #21 SAS/SATA HDD #21
SAS #10 SAS/SATA HDD #10 SAS #22 SAS/SATA HDD #22
SAS #11 SAS/SATA HDD #11 SAS #23 SAS/SATA HDD #23
SAS #1
SAS #0
SAS #2
SAS #3
SAS #7
SAS #6
SAS #8
SAS #9
SAS #13
SAS #12
SAS #14
SAS #15
SAS #19
SAS #18
SAS #20
SAS #21
SAS #4 SAS #10 SAS #16 SAS #22
SAS #5 SAS #11 SAS #17 SAS #23
Figure 2-3: Rear Connectors

2-7
Safety Information and Technical Specifications
Rear LED Indicators
Rear Connector Hard Drive Activity LED Failure LED
SAS #0 ACT #0 FAIL #0
SAS #1 ACT #1 FAIL #1
SAS #2 ACT #2 FAIL #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 #8 FAIL #8
SAS #9 ACT #9 FAIL #9
SAS #10 ACT #10 FAIL #10
SAS #11 ACT #11 FAIL #11
SAS #12 ACT #12 FAIL #12
SAS #13 ACT #13 FAIL #13
SAS #14 ACT #14 FAIL #14
SAS #15 ACT #15 FAIL #15
SAS #16 ACT #16 FAIL #16
SAS #17 ACT #17 FAIL #17
SAS #18 ACT #18 FAIL #18
SAS #19 ACT #19 FAIL #19
SAS #20 ACT #20 FAIL #20
SAS #21 ACT #21 FAIL #21
SAS #22 ACT #22 FAIL #22
SAS #23 ACT #23 FAIL #23

2-8
SAS-846EL Backplane User's Guide
Notes

3-1
Safety Information and Technical Specifications
PRI_FLASH1
PRI_FLASH1
J2 J2 J1
Port B
Secondary Ports
Expander 2
From HBA or higher
backplane
To lower backplane in
cascaded system To lower backplane in
cascaded system
Port A
Primary Ports
Expander 1
From HBA or higher
backplane
J0
J1
J0
3-1 Single and Dual Port Expanders
Single Ports
SAS-846EL1 backplanes have a single-port expander that access all twenty-four
drives and supports cascading.
Dual Ports
SAS-846EL2 backplanes have dual-port expanders that access all twenty-four
drives. These dual-port expanders support cascading, failover, and multipath.
Chapter 3
Dual Port and Cascading Configurations
Figure 3-1: SAS-846EL2 Dual Port Configuration
Figure 3-2: SAS-846EL1 Single Port Configuration
PRI_FLASH1
PRI_FLASH1
J2 J1
To lower backplane in
cascaded system
Port A
Primary Ports
Expander 1
From HBA or higher
backplane
J0

3-2
SAS-846EL Backplane User's Guide
Single Host Bus Adapter
In a single host bus configuration, the
backplane connects to one Host Bus
Adapter (HBA).
PRI_J0
PRI_J1
PRI_J2
SEC_J0 SEC_J1
SEC_J2
J17
WWN
SAS HBA
Port A
Expander 1
Port B
Expander 2
Figure 3-3: Single HBA
The SAS-846EL2 backplane has two expanders which allow effective failover.
3-2 Failover
PRI_J0
PRI_J1
PRI_J2
SEC_J0 SEC_J1
SEC_J2
J17
WWN
SAS HBA
Port A
Expander 1
Port B
Expander 2
Single Host Bus Adapter
Failover
If the expander or data path in Port A
fails, the system automatically switches
to Port B.
Figure 3-4: Single HBA Failover
PRI_J0
PRI_J1
PRI_J2
SEC_J0 SEC_J1
SEC_J2
J17
WWN
SAS HBA
Port A
Expander 1
Port B
Expander 2
SAS HBA
Dual Host Bus Adapter
In a Dual Host Bus Configuration, the
backplane connects to two Host Bus
Adapters (HBA).
Figure 3-5: Dual HBA
PRI_J0
PRI_J1
PRI_J2
SEC_J0 SEC_J1
SEC_J2
J17
WWN
SAS HBA
Port A
Expander 1
Port B
Expander 2
SAS HBA
Dual Host Bus Adapter
Failover
If the expander or data path in Port A
fails, the system automatically switches
to Port B. This maintains a full connec-
tion to all drives.
Figure 3-6: Dual HBA Failover

3-3
Safety Information and Technical Specifications
3-3 Chassis Power Card and Support Cables
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.
Chassis Power Card
In a cascaded configuration, the first chassis includes a motherboard and at least
one Host Bus Adapter (HBA). Other servers in this enclosed system, include a
power card. This section describes the supported power card for the SAS-846
series backplane.
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 SAS-846EL
chassis manual.
AA
AA
AA
REV 1.00
JBPWR2
Figure 3-7: Chassis Power Card (Sold Separately)

3-4
SAS-846EL Backplane User's Guide
Description: This cable has one SFF-8484 (32 pin) connector on one end and
iPass (SFF-8087/mini-sas) connector (36 pins) at the other. This cable connects
from the HBA to the SAS-846EL backplane.
Cable Name: iPass TO 4-lane
Part #: CBL-0117L Length: 46 cm (18 inches)
Figure 3-9: Dual Internal Host Bus Adapter
Supported Internal HBA Cables
Use the following listed cables to create connections between the internal HBA and
SAS-846EL backplane. The cables required depend on the HBA connector.
HBA
(Host Bus Adapter)
PRI_J0
PRI_J1
PRI_J2
SEC_J0 SEC_J1
SEC_J2
J17
WWN
Connecting an Internal Host Bus Adapter to the
Backplane
The following section lists the most common cables used to connect the Host Bus
Adapter (HBA) to the backplane.
Figure 3-8: Single Internal Host Bus Adapter
HBA (Host Bus Adapter)
HBA (Host Bus Adapter)
PRI_J0
PRI_J1
PRI_J2
SEC_J0 SEC_J1
SEC_J2
J17
WWN