Serial ATA - High
Speed Serialized AT Attachment - The Long-term Solution for Storage
Connectivity!
Serial ATA Specs:
The following excerpt
quoted from Serial ATA 1.0 gold Technical Specifications as pertaining to
our Technology Evaluation and possible eventual implementations.
Goals and objectives
Serial ATA is defined with
the following goals and requirements listed in no particular order:
-
Primary inside-the-box
storage connection (no outside the box).
-
Completely SW
transparent w/ ATA (easy transition).
-
Low pin count for both
host and devices (2 pairs).
-
Favorable (low)
voltages.
-
Supports lower cost
device architectures.
-
Higher performance than
equivalent ATA (data rate, queuing, overlap) w/ scalability to higher.
-
Much better
cabling/connectors (thin, flexible).
-
Includes efficient power
delivery.
-
No software dependency.
Relatively easy transition (price, IHV NRE and capital inventory.
-
risk, wide variety of
devices at intro, etc.).
-
Power management and
power consumption suitable for mobile use.
-
Allows roadmap spanning
~10 years.
-
Cable length comparable
to ATA (<1 m).
-
Transfer
rate exceeding best ATA (~150 MB/s)
with scalability to higher rates.
-
Light protocol allowing
overhead latencies to be minimized.
-
Asynchronous only (no
isochronous requirements).
-
No Peer-peer transfer
support (to/from host only).
-
Provides support for 1st
party DMA access to host.
-
Cost competitive with
equivalent Parallel ATA solution at introduction (host + device +
cable).
-
Storage device centric
(no cameras/scanners/printers).
-
Easy
installation/configuration (plug/play, no jumpers, no external
terminators).
-
Single host (no
multi-initiators or host/host networking).
This current Design path provides (3)
Generations of Serial ATA signaling growth.
- Generation 1:
1.2 Gbits/s (150 MBytes/sec); Due Mid 2001? Missed that one!
- Generation 2:
2.4 Gbits/s (300 MBytes/sec); Due Mid 2004. This is doable.
- Generation 3:
4.8 Gbits/s (600 MBytes/sec); Due Mid 2007. That's too far out to
predict.
Note: All current PATA (Parallel
ATA Specs) are Burst Mode and NOT sustained throughput!
Keep that in mind! The current industry performance standard is
ATA/ATAPI-6 (ATA/133, a.k.a. UDMA 133). Maxtor has jumped
ahead for now with their interim spec of ATA/133. Some have claimed this
ATA/133 spec can overwhelm the PCI Bus on certain Chipsets. After having
read the Data from those tests, we do not believe this will be a problem
for most Users.
Serial ATA Technology News Updates:
-
www.EETAsia.com
- Silicon Image debuts 3Gbps-capable SATA controller: "The
SiI 3124 is compliant with the Serial ATA 1.0 Specification and
supports all SATA II extensions to the Serial ATA 1.0
Specification..." (9/8/2003).
-
www.EETAsia.com
- 3Gbps host controllers set to go:
"Marvell Semiconductor Inc. will get a jump on next-generation
serial ATA designs when it announced that it is sampling 3Gbps host
controllers. Once hard-disk drives based on Sata II emerge early next
year, the SATA II Controllers aim to enable the faster and more
robust set of mid- and low-end servers and arrays that are expected to
support the second-generation standard.
The Marvell devices link to a
64-bit, 133MHz PCI-X host bus. Future versions will link to PCI
Express and will support the upcoming 3Gbps Serial Attached SCSI
standard." (8/19/2003)
- InfoWorld
Riding the SATA wave July 18, 2003 By Mario Apicella Storage: Serial
ATA Disk Drives for the Enterprise - Comparing Maxtor, Seagate &
WDC (7/22/2003).
- Electronic
Engineering Times - Asia - Serial ATA market on the rise: "SATA
is not just cool technology; it provides tangible benefits to
end-users and OEMs. For PC end-users, SATA offers an evolution to
rising hard-drive performance without a marked price impact."
(6/3/2003)
- www.LSI.com: www.lsilogic.com May 21, 2003 - LSI Logic shipping industry's first Serial ATA RAID
storage adapter with battery backup support: Serial ATA MegaRAID -
"...MegaRAID SATA 150-2 and the MegaRAID SATA 150-4, designed for
entry-level servers and performance workstations; and the
enterprise-class MegaRAID SATA 150-6..." (5/28/2003).
- www.buylsilogic.com:
- www.enterprisestorageforum.com
- SATA Evolutionary or Revolutionary Disk Technology:
-
www.wdc.com
- WD Delivers World’s Fastest Serial ATA Hard Drives to Retail
Stores: "WD RaptorTM Enterprise-class Hard
Drives Feed PC Enthusiasts' Need for Speed With 10,000 RPM and Serial
ATA Interface." (5/15/2003)
- www.vitesse.com
- Vitesse Adds to Serial ATA Product Line with Enterprise Class Switch:
"New Product Offers Versatility in Building High Availability,
Low Cost, Serial ATA Storage Systems - Vitesse Semiconductor Corp.
(Nasdaq: VTSS) today expanded its storage product portfolio to include
a 2:1 Serial ATA Failover Switch (VSC7175) designed for
high-availability Serial ATA I and Serial ATA II applications.
This switch directly combats the ATA
limitation of single host/single channel accessibility to storage
media through the employment of Vitesse's proven high-performance,
low-latency switching technology. Similarly, it can eliminate the
Serial ATA constraint of single target addressing through its simple
port replication function." (5/14/2003)
-
www.internetnews.com
- Adaptec Introduces Serial ATA RAID Controllers:
Although we currently have SCSI RAID & ATA RAID, we're now seeing
Serial ATA RAID coming to the market forefront rapidly and affordably.
Serial ATA RAID appears to be positioned to take over Server &
Desktop market share more quickly than previous HDD Storage Interface
Technologies of recent history. Parallel ATA is quickly making way for
the point to point Serial ATA Interface. Adaptec has launched Serial
ATA (SATA) products featuring MotherBoard and RAID card Solutions
(3/17/2003).
-
www.adaptec.com:
Serial ATA Products.
-
BuildOrBuy
RAID: Definition &
Purpose of ATA RAID.
- www.3ware.com -
ATA RAID controllers - High performance, low-cost ATA storage for the
enterprise: 3ware Serial ATA RAID
Controllers Benchmarks (3/8/2003).
- www.extremetech.com
- Via Adds Serial RAID Controller: "Via
Technologies Inc. has announced their own Serial ATA RAID
controller..." (3/7/2003).
- Storage
Networking World Online - Taking a no-compromise approach to high-end
storage: SAS and SATA: Unparalleled serial
interface compatibility "For over 20 years, the parallel bus
interface has been the mainstream storage interconnect for most
storage systems. But increasing bandwidth and flexibility demands have
exposed inefficiencies in the two main parallel interface
technologies: SCSI and ATA. The lack of compatibility between Parallel
ATA and SCSI — including different connectors, cables and
software..." (3/5/03).
- ExtremeTech.com:
Serial ATA Could Be Slow To Take Off (3/1/2003).
- ExtremeTech.com:
First Serial ATA Drive Expectations Exceed Results (1/9/03).
- ExtremeTech.com:
Seagate Ships Second Serial ATA Drive 12/2/2002.
- WestWorld
Productions -- CTN: Serial
ATA
-
Opening new markets for ATA
RAID
(11/30/2002).
- ExtremeTech.com:
Intel Intros Serial ATA-2 Controller
(10/29/2002).
- HighPoint-Tech.com:
RocketRAID 1540 includes RocketHead100
Converter
"Each RocketRAID 1540 includes four
RocketHead 100 converters. This device allows users to connect
ATA100 and ATA133 IDE hard disk drives to the Serial ATA controller. This
converter is not available as a separate product!" More
Info... (9/30/2002)
- www.AOpen.com
- AOpen
introduces first Serial ATA Motherboard with Intel 845E chipset
Utilizes Promise Serial
ATA Chipset Supporting Bandwidth of 150MB/Sec (8/21/2002)!
-
www.microsoft.com - Introduction to Storage Technologies: (2/4/2007)
-
www.microsoft.com - Serial ATA in the Microsoft Operating System
Environment:
- infoworld.com:
The other fast storage
(8/6/2002).
- Adaptec.com:
Emerging Technology Serial ATA
(7/11/2002).
- DigiTimes.com:
Serial ATA-based boards hitting market in late July, but not
mainstream until 2003 Motherboards supporting the next generation
Serial ATA HD Interface to ship in July! Expect
Serial ATA initially offered as PCI Add-in Cards followed by extra M/B
Serial ATA Controller Chips before final integration into M/B
Southbridge Chipsets in 2003 (7/6/2002).
- Serial
ATA companies STORAGEsearch.com
- Serial
Attached SCSI companies STORAGEsearch.com
- intel.com/pressroom:
Industry Leaders Collaborate on New Choices for Next-Generation Serial
Architectures for Server Storage (6/12/2002).
- www.serialata.org
- Serial
ATA - Workgroup: See: For
More Info & Specifications
- Dell
- Serial ATA Interface:
Serial ATA Technology Overview (7/6/2002)
- Serial
ATA Protocol Analyzer - CATC Development Products
- TheInquirer.net:
DFI to demo Serial ATA motherboard, drive
- DFI.com:
Press Room... Computex Update- DFI launches New designs- Live demo
with a difference- Serial ATA!
(7/6/2002)
- SOYO
Unveils 10 New Motherboard Designs and Integrated Serial ATA-133
Storage Interface Technology At Computex Taipei 2002
- Promise.com:
Date - Computex Taipei 2002 -
Taipei Internatinoal Computer Show - “Serial
ATA Total Solution” Controllers & RAID Announced @
Computex2002
- Technical
Overview: system_builder_summit_2002a.ppt
3.25 MB (4/2/2002).
- Technical
Overview: system_builder_summit_2002.ppt
3.93 MB (4/2/2002).
- Maxtor
Drives Support For Serial ATA:
Maxtor, Intel and Adaptec Working Together on Serial ATA (2/25/2002)
- ExtremeTech.com:
Serial ATA II, Server Chipset Push On Tap For IDF
(2/14/2002).
- SerialAttachedSCSI.com:
SAS - SCSI
Trade Association and Serial Attached SCSI Working Group Announce
Agreement - Serial Attached SCSI Working Group Selects STA to
Support Development and Promotion of Serial Technology (2/4/2002).
- infoworld.com:
Serial ATA and iSCSI - Analysis
(1/4/2002).
-
Maxtor.com - Technologies: ((2/4/2007))
-
Intel.com - Serial ATA: (2/4/2007)
-
Intel.com - AHCI Specification for Serial ATA:
- Serial ATA-IO:
- Dispelling the
Confusion: SATA II does not mean 3Gb/s:
In discussing this new emerging
Technology, keep in mind this also is a work in progress. We'll share what
we know, and where to learn as we comment further. Dates listed for each
link may not reflect date of publication. According to Hal Landis - ATA-ATAPI.COM,
Serial ATA may turn out to be a WinDisk HD device - Ugh! Time will
tell! Update: SATA has turned out to be a welcome treat! (2/6/2009)
|
|