Transcript SAS & SATA II Tutorial - Custom Cable Assemblies | USA

SAS, Mini-SAS, & SATA
Tutorial & Ordering Information
Technical Cable Concepts, Inc.
[email protected]
www.techcable.com
350 Lear Avenue Costa Mesa, CA 92626 (800) 832-2225
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Table of Contents
SAS Properties --------------------------------------------------------------- 3
SAS Environment ------------------------------------------------------------ 6
SAS Assembly Properties ------------------------------------------------- 9
Mini-SAS Properties -------------------------------------------------------- 13
Mini-SAS Assembly Properties ------------------------------------------ 14
SATA Terminology & Properties ----------------------------------------- 16
SATA Cable Properties (Frequency & Quality) ---------------------- 19
SATA Environment ---------------------------------------------------------- 20
SATA Assembly Properties ----------------------------------------------- 33
SATA & SAS Similarities & Differences -------------------------------- 38
TCC Part Numbers -----------------------------------------------------------43
References -------------------------------------------------------------------- 49
Ending Statement ----------------------------------------------------------- 50
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SAS Properties
SAS (Serial Attached SCSI)
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Supports SCSI disk drives, tape drives, software, etc.
Supports SAS expanders.
Uses both SAS and SATA connectors (fanouts).
Uses different pinouts:
• Backplane to Controller = 1-1
• Controller to Backplane = “Crossover” 1-7
• Controller to Controller = “Crossover” for SFF-8470 to (4)
SATA Assemblies
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SAS Properties
SAS
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•
•
•
Supports SATA
Uses differential signaling
Has a passive interconnect
Available in 6 standard connector types:
• SAS: SFF-8470, SFF-8484, SFF-8482
• Mini-SAS: SFF-8086, SFF-8087, SFF-8088
• Runs at 3.0Gbs duplex communication
• Known sometimes as iSAS
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SAS Properties
SAS SATA Compatibility
• SAS backplanes OK with SATA drives.
• SATA backplanes not OK with SAS drives.
Backplane
Backplane
SATA
Drive
SAS
Drive
5
SAS Environment
Cabling Example
Storage
Enclosures
External 4
Lane Cables
SAS RAID
Controller
Interna
l 4 Lane
Cable
SAS &
SATA
Drives
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SAS Environment
Cabling Example
Internal
Externa
l
Internal
Externa
l
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SAS Environment
8
SAS
Assembly Properties
External Connector Signal Assignments
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•
•
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All the Rx signals are grouped together
All the Tx signals are grouped together
9 additional ground signals
No external power signals
No external READY LED signals
Cable connects Tx on one side to Rx on
the other side
T10
Specification
Pin
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
S12
S13
S14
S15
S16
Signal
Rx 0+
Rx 0Rx 1+
Rx 1Rx 2+
Rx 2Rx 3+
Rx 3Tx 3Tx 3+
Tx 2Tx 2+
Tx 1Tx 1+
Tx 0Tx 0+
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SAS
Assembly Properties
Connectors
• SFF-8470
SFF-8470 Standard Thumbscrew
• 4X or 4 Lane
• Thumbscrew Backshell (standard)
• Squeeze-Latch Backshell
• Low Profile Squeeze-Latch (3 Ware)
SFF-8470 SqueezeLatch
SFF-8470 Low Profile SqueezeLatch (used for 3Ware
products)
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SAS
Assembly Properties
Connectors
• SFF-8484
• 32 ML, Multi Lane, SAS Wide, or SAS 4i
• Same connector on internal & external assemblies
• Side-band options
• Up to 4 phys links & 6 side-band links
Internal SFF-8484
External SFF-8484
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SAS
Assembly Properties
Connectors
• SFF-8482
• 29 or Drive Connector
• Used on drive cables with power supply
4 or15 power supply available
Used on some fanout assemblies
• Female & Male Versions
Male used in SAS drive extension cables
SFF-8482 Male on SAS
Drive Extension
SFF-8482 Female Drive
Receptacle
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Mini-SAS Properties
Mini-SAS Cables
• Type of SAS cable
• 2 internal versions
• 1 external version
Internal Mini-SAS
• Available with side-band
• SATA fanouts use 3Gb cable
Side-band on
Internal Mini-SAS
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Mini-SAS
Assembly Properties
Connectors
• SFF-8086
SFF-8086 “Mini SAS”
• 26 pos. Internal Connector
• Mini SAS 26 Compact Multi-Lane Unshielded
• iSAS
• SFF-8087
SFF-8087 “Mini SAS”
• 36 pos. Internal Connector
• Mini SAS 36 Compact Multi-Lane Unshielded
• iSAS
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Mini-SAS
Assembly Properties
Connectors
• SFF-8088
• External Connector
• Mini SAS 26 Compact Multi-Lane Shielded
• TCC uses a Universal Key for 2, 4 & 6
SFF-8088 “Mini SAS”
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SATA Terminology
Parallel ATA (PATA)
• Parallel bus architecture
• Also known as ATA
Serial ATA (SATA)
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•
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Serial bus architecture
Generation 1 = 1.5Gbs
Generation 2 = 3.0Gbs
Compatible with Ultra software
Devices use ATA command set
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SATA Terminology
SATA II
Is name of the organization that authored the second
generation SATA specifications.
That organization is now called the Serial ATA
International Organization (SATA-IO)
For more information, read the naming guideline spec:
http://www.sata-io.org/6gbnamingguidelines.asp
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SATA Terminology
All TCC SATA assemblies are:
• Second Generation 3Gbs
• Low Profile
• High Frequency Cables
• High Quality Cables
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SATA Properties
SATA 2nd Generation Cables
• Also known as SATA 3Gbs
• Backwards compatible with 1st Generation 1.5 Gbs
• Point-to-Point
• 100 ohm
• 2-pair flat cable
• Additional 15 conductor for power available
• Power available in 4 or 15 position
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SATA Environment
Cabling Example
Internal
External
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SATA
Cable Properties
Frequency and Quality
All TCC SATA and SAS assemblies are
• high frequency and high quality
• backwards compatible with 1st Generation
TCC uses the latest engineering and
manufacturing techniques to provide improved
cable signal integrity through impedance
matching and reduced crosstalk.
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SATA
Cable Properties
High Frequency and High Quality Cable
The following information about frequency and quality
is given to understand the basic:
• characteristics of the cable used in assemblies
• cable’s affect on performance
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SATA
Cable Properties
High Frequency and High Quality Cable:
Frequency and speed are the same when discussing data
transmission in these SATA 3Gbs cables.
Frequency
• High Frequency cables meet the SATA standard
3Gbs for data transmission.
• Low Frequency cables do not and are generally
poor quality cables.
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SATA
Cable Properties
High Frequency and High Quality Cable
High Frequency Cables
• transmit signals down the cable at a high rate of speed.
• run at 1.5 and 3.0 Gbs
• meet SATA specifications
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SATA
Cable Properties
High Frequency and High Quality Cable:
Low Frequency Cables
• The signals are transmitted down the
cable at a low rate of speed.
They are usually:
• low quality cables
• out of 3Gbs specification
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SATA
Cable Properties
High Frequency and High Quality Cable:
Low Frequency Cables
• Low performance usually because of poor quality:
- inadequate soldering joints
- careless cable preparation
- inferior cable and cable assembly
manufacturing methods.
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SATA
Cable Properties
High Frequency and High Quality Cable
High Quality Cables
Cables must be manufactured by
reputable suppliers to ensure:
• assembly quality
• electrical quality
• cables were not manufactured on the bench top
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SATA
Cable Properties
High Frequency and High Quality Cable:
High Quality Cables
• support high bandwidth
differential signaling
figure 1
• use twin-ax wiring in a coax-type transmission
cable (figure 1)
Internal Cables: Single-lane and multi-lane
External Cables: Multi-lane
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SATA
Cable Properties
High Frequency and High Quality Cable:
High Quality Cables
SHIELDING & DRAIN
WIRES
figure 1
The method of shielding the cable has a profound effect on
the cable’s performance and is a major factor in quality and
cost (figure 1).
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SATA
Cable Properties
High Frequency and High Quality Cable
High Quality Cables
Proper Shielding Methods
1. Each channel has two
conductors, both jacketed by a primary insulator.
2. The pair of conductors is covered completely by a
conductive shield, either foil or braided.
3. Precision-wound, spiral wrap foil shielding and drain
wires guarantee continuity of the shield.
4. The entire assembly is covered with (usually PVC) an
insulating and protective outer layer called the jacket.
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SATA
Cable Properties
High Frequency and High Quality Cable
High Quality Cables:
Inadequate shielding
causes:
• Impedance Discontinuities: unraveled shields or broken
shield connections will cause reflected signal energy.
• Cross-Talk, Signal Loss, EMI (electromagnetic
interference): will be caused by discontinuous shielding.
• Excessive Conductor Skew: faulty connector termination
also causes the above performance hindrances.
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SATA
Cable Properties
High Frequency and High Quality Cable
Remember:
High Frequency cables meet the SATA standard
for data transmission.
Low Frequency cables do not and are generally
poor quality cables.
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SATA
Assembly Properties
SATA 3Gbs Cables
• Thin, flexible, coax-like cable
• SATA connector types:
• Straight or right-angle
• Click-connect (latch) or friction-fit attachment
• Low profile or large
• SAS connectors can be on SATA cables (fanouts)
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SATA
Assembly Properties
TCC’s SATA Cables
• Low Profile Connectors
“Click-Connect” Latch
Friction-Fit Latch
Straight
Straight
Right-Angle
Right-Angle
• Fanout Cables
• Variety of SAS or Mini-SAS
connectors
Mini-SAS Fanout
SAS Fanout
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SATA
Assembly Properties
eSATA Cables
eSATA
• Not a SATA “L” connector interface
• For portable external drives
• 6X faster than USB 2 and 1394
• Single lane transfer
• Guide keys on both sides of connector face
• Secured by latch on top of connector face
• Designed for 5K insertions & removals
• Regular SATA only 50 Insertion & Removal Cycles
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SATA
Assembly Properties
External SATA Cables
• Same “L” Interface as internal SATA
• Different Interface than eSATA
• Key on one side only
• No securing latch- uses friction method
Shielded SATA
eSATA
Securing Latch
“L” Interface
Guide Key
Guide Keys
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SATA
Assembly Properties
Power Connector Detail
(SATA)
15 pin power
signal
(SATA)
15 pin power
signal
(Ultra ATA)
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SATA and SAS
Similarities
• Both SATA and SAS connectors can be on the same
cable assembly.
• Both types of HDD drives plug into the SAS backplane.
• Both types of drives are interchangeable within a SAS
drive bay module.
• Both are long-proven technologies with worldwide
acceptance.
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SATA and SAS
Differences
•
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SATA backplane cannot accept SAS drives.
SAS backplane can accept SATA drives.
SATA drives are less expensive than SAS.
SAS drives have:
• Dual porting capability, faster spindle speeds, &
lower latencies.
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SATA and SAS
Differences
• SAS drives undergo more rigid testing specifications
than SATA.
• SAS drives have longer MTBF and duty cycle than
SATA.
• SAS drives are faster and offer more features than
SATA:
• Variable sector sizes, LED indicators, dual ports, & more stable data
integrity
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SATA and SAS
SAS & SATA Connector Details
SAS has same footprint as
SATA (7 + 15 pins) except it
has 2nd physical layer
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SATA and SAS
What to choose
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SATA when COST is #1 priority
SAS when PERFORMANCE is #1 priority
SATA has simplest set-up
SAS has greater scalability
SATA has better power management
SAS has greater device flexibility
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Call Us:
TCC Part Numbers
(800) 832-2225
www.techcable.com
SATA Drive Cables
247726-XXXXMML
SATA “Click-Connect” Latch (1-1)
247726-XXXXMM
SATA Non-Latch (1-1)
247729-XXXXMM
SATA Non-Latch (1-7)
247727-XXXXMML
SATA-R/A SATA Latch (1-1)
247727-XXXXMM
SATA-R/A SATA Non-Latch (1-1)
24772X-XXXXMML
SATA-R/A SATA Latch (1-7)
24772X-XXXXMM
SATA-R/A SATA Non-Latch (1-7)
SATA Power Cables
291015-XXXXMM
No Ground Power Cable
291548-XXXXMM
Grounded Power Cable
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Call Us:
TCC Part Numbers
(800) 832-2225
www.techcable.com
SATA Fanout Cables
Internal SAS
297426-XXXXMM
SFF-8484- (4)SATA (1-1)
297429-XXXXMM
SFF-8484- (4)SATA (1-7)
297526-XXXXMM
SFF-8484-(4)SATA RR/A (1-1)
297529-XXXXMM
SFF-8484-(4)SATA RR/A (1-7)
297626-XXXXMM
SFF-8484- (4)SATA R/A (1-1)
297629-XXXXMM
SFF-8484- (4)SATA R/A (1-7)
294626-XXXXMM
SFF-8470 to (4) SATA (1-7)
294629-XXXXMM
SFF-8470 to (4) SATA (C-C)
291626-XXXXMM
SFF-8470 LP – (4) SATA (1-1)
291629R-XXXXMM
SFF-8470 LP – (4) SATA R/A (1-7)
2136476-XXXXMM
SFF-8087- (4)SATA (1-1)
2136479-XXXXMM
SFF-8087- (4)SATA (1-7)
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Call Us:
TCC Part Numbers
(800) 832-2225
www.techcable.com
Internal SAS
291715-XXXXMM
SFF-8482M to SATA
w/6” 15Pwr
292715-XXXXMM
SFF-8482M to (2)SATA
w/6” 15 Pwr
299715-XXXXMM
SFF-8482 to (2)SATA
w/6” 15 Pwr
299706-XXXXMM
SFF-8482 to (2)SATA
w/6” 4 Pwr
292704-XXXXM
SFF-8482 to (2)SATA
w/12” 4 Pwr
292296P-XXXXMM
SFF-8470 to (2)8482
w/6” 4 Pwr
298715-XXXXMM
SFF-8482M to SATA
w/15 Pwr Extender
324296-XXXXMM
SFF-8484-(4)8482 w/4 Pwr (1-1)
324299-XXXXMM
SFF-8484-(4)8482 w/4 Pwr (1-7)
293226-XXXXMM
SFF-8484 Mesh w/Side Band
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Call Us:
TCC Part Numbers
(800) 832-2225
www.techcable.com
External SAS
294428-XXXXMM
SFF-8470 Assembly
291128-XXXXMM
4X LPSQ Assembly
292228-XXXXMM
4X SQ Assembly
292428-XXXXMM
SFF-8470 to 4X SQ
291428-XXXXMM
SFF-8470 to 4X LP SQ
290428-XXXXMM
SFF-8470 to4 X InfiniBand
294328-XXXXMM
SFF-8470 to SFF-8484
294728-XXXXMM
SFF-8470 to (4) 1X InfiniBand
293328-XXXXMM
SFF-8484 Round Assembly
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Call Us:
TCC Part Numbers
(800) 832-2225
www.techcable.com
Mini-SAS
212261-XXXXMM
SFF-8086 Assembly
212626-XXXXMM
SFF-8088 Assembly
213636-XXXXMM
SFF-8087 Assembly
212644-XXXXMM
SFF-8088 to SFF-8470
213632-XXXXMM
SFF-8087 to SFF-8484 no SB
212636-XXXXMM
SFF-8088 to SFF-8087
2136446-XXXXMM
SFF-8087 to SFF-8470 (1-1)
2136449-XXXXMM
SFF-8087 to SFF-8470 (1-7)
2136426-XXXXMM
2136429-XXXXMM
SFF-8087 to SFF-8470 LPSQ (1-1)
SFF-8087 to SFF-8470 LPSQ (1-7)
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Call Us:
TCC Part Numbers
External SATA
eSATA
247716-XXXXMM
SATA Shielded Round Assembly
2926R6-XXXXMM
(4)SATA Shield to SAS 4X SQ (1-1)
2926R9-XXXXMM
(4)SATA Shield to SAS 4X SQ (1-7)
247756-XXXXMM
eSATA – SATA Shielded Round
2906R6-XXXXMM
(4)SATA Shield to InfiniBand 4X (1-1)
2906R9-XXXXMM
(4)SATA Shield to InfiniBand 4X (1-7)
External
SATA
(800) 832-2225
www.techcable.com
eSATA
247796-XXXXMM
eSATA Assembly
294696-XXXXMM
SFF-8470 to (4)eSATA (1-7)
294699-XXXXMM
SFF-8470 to (4)eSATA (1-1)
247816-XXXXMM
SATA Shield to InfiniBand 1X (1-1)
247819-XXXXMM
SATA Shield to InfiniBand 1X (1-7)
290796-XXXXMM
(4)eSATA to InfiniBand 4X (1-1)
290799-XXXXMM
(4)eSATA to InfiniBand 4X (1-7)
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References
TCC appreciates the SCSI Trade Association (STA)
and Hewlett-Packard for providing most of the
information used in this tutorial.
• Serial ATA International Organization
http://www.sata-io.org/index.asp
• International Committee for Information Technology
Standards http://www.ncits.org/
• T13 (ATA Standards)
http://www.ncits.org/tc_home/t13.htm
• T10 (SCSI Standards)
http://www.ncits.org/tc_home/t10.htm
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End of Tutorial
Technical Cable Concepts, Inc., thanks you
for your time.
TCC is always pursuing the latest technology
and together with your valued partnership,
we can ensure our mutual success in the
future.
Produced by TCC, 2009
www.techcable.com
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