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Topic: Serial Attached SCSI

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	Seagate Technology - Интерфейс Serial Attached SCSI. Вопросы и ответы
		Интерфейс Serial Attached SCSI (SAS) появился в результате эволюционного развития Parallel SCSI – проверенной временем технологии, которая была основой систем хранения данных корпоративного класса на протяжении более чем двух десятилетий.
		По сравнению с Parallel SCSI интерфейс Serial Attached SCSI обеспечивает сегодня более высокую пропускную способность и имеет больший потенциал для развития в будущем.
		Интерфейс Parallel SCSI очень долго являлся основой систем хранения данных корпоративного класса и еще некоторое время сохранит свое присутствие в этом сегменте.
	www.seagate.com /ww/v/index.jsp?vgnextoid=aba4b4b8478ce010VgnVCM100000dd04090aRCRD&locale=ru-RU (716 words)

	Seagate Technology - Serial Attached SCSI - Frequently Asked Questions
		That said, Serial Attached SCSI is a compelling complement that matches the superb reliability and robustness of its acclaimed predecessor, while significantly expanding the SCSI envelope in terms of speed, scalability and flexibility.
		Serial Attached SCSI is an enterprise-class solution that goes beyond its interface to deliver the superior performance, reliability and scalability demanded in mission-critical applications.
		Serial Attached SCSI and Fibre Channel are both advanced, enterprise-class solutions with specific attributes that influence their suitability for a given application.
	www.seagate.com /ww/v/index.jsp?vgnextoid=f56b700ffbfbe010VgnVCM100000dd04090aRCRD&locale=en-GB (741 words)

	SAS (Serial Attached SCSI) Resource Center: SAS Software, Training, Devices, Info and Pictures
		Serial Attached SCSI (SAS) is the logical evolution of the SCSI interface that satisfies the enterprise data center requirement of scalability, performance, reliability and manageability, while providing an enterprise storage infrastructure for both enterprise SAS drives and SATA disk drives.
		Serial Attached SCSI is an enterprise-class solution that goes beyond its interface to deliver the superior performance, reliability and scalability demanded in mission-critical applications.
		SCSI is organized hierarchically with an upper-level set of commands, that are passed down to an architecture layer and then from their down to the protocol layer.
	www.infostor.com /sas/sas_questions.cfm (2365 words)

	Serial Attached SCSI - Wikipedia, the free encyclopedia
		In computer hardware, Serial Attached SCSI (SAS) is a computer bus technology primarily designed for transfer of data to and from devices like hard disk, cd-rom and so on.
		SAS is a serial communication protocol for direct attached storage (DAS) devices.
		Serial Attached SCSI Expander (SAS Expander) is a component used to facilitate communication between large numbers of SAS devices.
	en.wikipedia.org /wiki/Serial_Attached_SCSI (1323 words)

	Serial Attached SCSI companies, articles, news on STORAGEsearch.com
		The new RC5000 series controllers provide support for the latest serial attached SCSI and SATA specifications, as well as supporting both the traditional PCI-X and newer PCI Express bus standards.
		STORAGEsearch.com was the first publication to provide a dedicated Serial Attached SCSI page in November 2001, the same month in which the new standard was first publicly announced.
		Serial Attached SCSI is the first real attempt in SCSI history to lower cost and simplify the physical connection.
	www.storagesearch.com /serialscsi.html (4736 words)

	LSI : Insight Center : Industry Standards : Storage Connectivity : SAS : Why Develop a Serial SCSI Interface?
		SCSI has been with the industry for 20+ years, is here today with Ultra320 SCSI products and will extend into the future as serial-based products evolve.
		Serial Attached SCSI (SAS) is the logical evolution of the SCSI interface and will satisfy the growing need for enterprise data requirements of scalability and high performance reliability while retaining the manageability SCSI has been known for.
		Serial Attached SCSI solves the clock skew and signal integrity issues that occur at the frequencies necessary to scale the data transfer rates required for future generations of high performance storage systems.
	www.lsilogic.com /insight_center/industry_standards/storage_connectivity/sas/developer_interface.html (450 words)

	Maxtor.com - Serial Attached SCSI
		Serial Attached SCSI is a new near-cabinet and disk interface technology that will leverage the best of the SCSI, serial ATA, and fibre channel interfaces to bring new capabilities, high levels of availability, and more scalable performance to future generations of servers and storage systems.
		Serial Attached SCSI uses a serial, point-to-point topology to overcome the performance barriers associated with storage systems based on parallel bus or arbitrated loop architectures.
		The first Serial Attached SCSI systems and disk drives are expected to appear in the marketplace during 2004.
	www.maxtor.com /en/technologies/serial_attached_scsi/index.htm (241 words)

	SCSI: Small Computer System Interface (SCSI-1, SCSI-2, SCSI-3, SAS)
		Serial Attached SCSI (SAS) is an evolutionary replacement for the Parallel SCSI physical storage interface.
		Serial Attached SCSI (SAS) is a point-to-point connection and allows multiple ports to be aggregated into a single controller, either built onto the mother board or as an add-on.
		Serial Attached SCSI (SAS) uses Serial ATA (SATA) cables which are a thin point-to-point connection allowing easy cable routing within a computer system, without the need for daisy-chaining.
	www.javvin.com /protocolSCSI.html (514 words)

	PCQuest : In Depth : Serial Attached SCSI
		In a serial device, data bits are transmitted one after another on a single channel while in a parallel device, all the bits are transmitted together on several channels.
		Serial Attached SCSI or SAS is the evolution of SCSI that's been in parallel mode so far as a serial mode device.
		While SCSI requires each drive to be assigned this ID manually-a Herculean task when you have a thousand drives-SAS drives are stamped with a universally unique ID at the time of manufacture, relieving administrators from the cumbersome task of having to manage so many IDs.
	www.pcquest.com /content/depth/2006/106030802.asp (1355 words)

	SAS - Serial Attached SCSI
		Serial Attached SCSI (SAS) is an evolutionary replacement for the Parallel SCSI physical storage interface.
		Serial Attached SCSI (SAS) is a point-to-point connection and allows multiple ports to be aggregated into a single controller, either built onto the mother board or as an add-on.
		Serial Attached SCSI (SAS) uses Serial ATA (SATA) cables which are a thin point-to-point connection allowing easy cable routing within a computer system, without the need for daisy-chaining.
	www.networkdictionary.com /protocols/sas.php (129 words)

	SAS analyzer, SAS protocol analyzers, sas analyzers, sas analyser, sas analysers, Serial Attached SCSI (SAS) analyzer (Site not responding. Last check: 2007-11-07)
		Serial Attached SCSI intends to leverage the 20 years of proven SCSI legacy middleware/software that is entrenched in the enterprise, as well as deliver a powerful small form factor connection scheme, capable of achieving substantially better performance and scalability than parallel SCSI offers today.
		Introducing SCSI Expanders: Serial Attached SCSI takes advantage of these VLSI advances to enable a highly scalable connection scheme and to allow the connection topology to grow through the use of "expanders." Expanders provide the necessary fan-out to create large enterprise-worthy configurations while maintaining legacy compatibility with SCSI software.
		This allows systems to be deployed that can use either Serial Attached SCSI drives, for their high performance and high availability characteristics, or SATA drives that will provide a lower-cost-per-megabyte storage platform.
	www.lecroy.com /korea/tm/Solutions/Protocol/sas.asp?menuid=151 (756 words)

	iSCSI and Serial Attached SCSI: storage technologies for SMBs and remote offices Computer Technology Review - Find ... (Site not responding. Last check: 2007-11-07)
		While network attached storage (NAS) systems meet the requirements for applications that access data at a file level, a storage area network (SAN) is required to consolidate the storage resources supporting block I/O applications like databases and Microsoft Exchange.
		Serial Attached SCSI is a new enterprise disk interface developed as a replacement to parallel SCSI to improve storage system performance, scalability, and availability.
		With Serial Attached SCSI, IT managers have the flexibility to purchase servers and storage systems that can be configured with either Serial ATA or Serial Attached SCSI disk drives or both, enabling the use of high-performance and low-cost disks in the same storage system.
	www.findarticles.com /p/articles/mi_m0BRZ/is_5_25/ai_n15795451 (860 words)

	Maximizing System Availability with Serial Attached SCSI - Computer Technology Review (Site not responding. Last check: 2007-11-07)
		Serial Attached SCSI, the successor technology to the parallel SCSI interface, leverages proven SCSI functionality and promises to greatly build on the existing capabilities of the enterprise storage connection.
		Serial Attached SCSI has emerged to deliver higher levels of reliability than previous generations of SCSI for mission-critical transactional applications that must be online around-the-clock with no data loss.
		Serial Attached SCSI overcomes this shortcoming in reliability by supporting a network of dedicated point-to-point device connections that eliminates this single point of failure.
	www.wwpi.com /index.php?option=com_content&task=view&id=130&Itemid=67 (2022 words)

	Serial-Attached SCSI Devices Slow To Market - Hardware Technology News by InformationWeek (Site not responding. Last check: 2007-11-07)
		The SCSI Trade Association demonstrated technology related to Serial-Attached SCSI at the Intel Developer Forum this week in San Francisco.
		Serial-Attached SCSI (SAS), which was published as an official standard last November, bumps performance of SCSI hard drives to 3 Gbps, compared with 2 Gbps for Fibre Channel drives, said Harry Mason, president of the association and the director of industry marketing at LSI Logic.
		That should compare with 8.8 million parallel SCSI drives and 8.5 million Fibre Channel drives in 2007, the analyst firm said.
	www.informationweek.com /hardware/desktop/17800151 (364 words)

	Serial Attached SCSI - PlanetAMD64 (Site not responding. Last check: 2007-11-07)
		Serial Attached SCSI is the next step for the enterprise industry's storage I/O standard interface.
		Serial Attached SCSI meets all these demands while providing the highest performance at optimal capacity points.
		SAS is the next generation of the SCSI interface, developed to improve storage system performance, scalability, and availability and extend the capabilities of today’s parallel SCSI disk drives.
	www.planetamd64.com /index.php?showtopic=5076 (1440 words)

	Luminous Landscape Forum -> 15 K drive (Site not responding. Last check: 2007-11-07)
		The Serial Attached SCSI is an interesting technology that uses basically the same connectors and wiring as SATA but accesses higher data transfer rates.
		The observation I have is that the breed of Serial Attached SCSI controller boards seem to be headed for PCI express but in the x16 format (as used for video cards).
		The observation I have is that the breed of Serial Attached SCSI controller boards seem to be headed for PCI express but in the x16 format (as used for video cards). I haven't come across any motherboards yet with more than two x16 slots (generally intended for dual video cards).
	www.luminous-landscape.com /forum/index.php?showtopic=12002&mode=threaded&pid=75745 (851 words)

	Interest increases in Serial Attached SCSI - 22/Nov/2005 - ComputerWeekly.com
		Serial Attached SCSI, the newest development in SCSI technology, is designed to provide enterprise-class performance, high reliability at low cost.
		One of the advantages of Serial Attached SCSI is that performance improves with each drive that is added into the disc array, making it possible to configure very high-performance transaction servers at costs comparable to traditional parallel SCSI-based systems, according to Fujitsu.
		Serial attached SCSI drives are compatible with existing SCSI software and operating systems.
	www.computerweekly.com /Articles/2005/11/22/213060/interest-increases-in-serial-attached-scsi.htm (308 words)

	Serial Attached SCSI - Express Computer
		Serial Attached SCSI (SAS) is tipped to be the successor of SCSI and will be extensively used in workstations, servers and external storage boxes, says Venkatesh Ganesh
		While SCSI still dominates the mainstream server storage market, Serial Attached SCSI can provide the extra value for enterprise applications where reliability, availability and scalability are key requirements.
		Serial SCSI offers vendors a terrific opportunity to take advantage of these ‘commodity’ parts to bundle innovative technology.
	www.expresscomputeronline.com /20041206/technology01.shtml (903 words)

	Serial Attached SCSI
		Serial ATA made improvements in data integrity and is now able to compete with the Small Computer Systems Interface (SCSI) in the enterprise market.
		The high-speed serial interface on the ATA was supplemented with improvements in error detection and of course the speed of the interface changed.
		SCSI drives have often been located in external cabinets, away from the actual servers to which they are connected.
	www.ttiinc.com /object/ME_Bishop_SCSI.html (587 words)

	What is serial-attached SCSI? - a definition from Whatis.com - see also: SAS, serial-attached storage
		In the business enterprise, serial-attached SCSI is especially of interest for access to mass storage devices, particularly external hard drives.
		Problems related to crosstalk are less likely in serial interfaces than in parallel interfaces, because there are fewer conductors in the cables.
		Serial-attached SCSI is said to offer an ideal solution for businesses with substantial storage, backup, and archiving demands.
	searchstorage.techtarget.com /sDefinition/0,290660,sid5_gci1026971,00.html (402 words)

	Make way for serial-attached SCSI
		Serial-attached SCSI (SAS) is having a smooth transition from the engineering white board to the marketplace, largely because it incorporates older technologies such as SCSI and the trusted XAUI physical layer.
		SAS and serial ATA share a similar out-of-band protocol (OOB) used to let end nodes identify each other as SAS or SATA devices and perform initialization.
		SCSI was hampered by a 16 device limit on each bus.
	searchstorage.techtarget.com /tip/1,289483,sid5_gci1025241,00.html (898 words)

	InfoStor - The benefits of Serial Attached SCSI (SAS)
		Although SAS was not the first attempt to serialize the SCSI protocol, it is the first standard specification to provide an interconnect mechanism for both SCSI and Serial ATA (SATA).
		Serialization of the SCSI interface overcomes the physical and functional limitations of parallel interface technology.
		Serial Attached SCSI (SAS) components (chips, controllers, etc.) entered the market late last year, and servers, blade servers, and subsystems for end users are expected in the second half of this year.
	www.infostor.com /Articles/Article_Display.cfm?Section=ARTCL&ARTICLE_ID=232832&VERSION_NUM=2&p=23 (2054 words)

	Serial Attached SCSI moving right along (Site not responding. Last check: 2007-11-07)
		HP, Seagate and Adaptec demoed Serial Attached SCSI this past week at CeBIT, hoping to keep faith in SCSI alive among a crowd of people becoming increasingly attracted to Serial ATA.
		Higher-performing and more complex SCSI drives are still the drives of choice for high-end servers, while ATA technologies typically dominate the PC world (except back in the olden days, when PowerMacs often had SCSI drives).
		At this moment I'm writing this news post on a Canterwood i875 mobo that is currently booting Raid 0 off of two WD Raptor 10k RPM drives.
	arstechnica.com /news/posts/1056217597.html (558 words)

	Special Report: Serial Attached SCSI - Storage & Servers - Network Computing (Site not responding. Last check: 2007-11-07)
		One of the most comfortable and recognizable technologies to both server and storage admins is SCSI, which for 20 years has offered us a fast and flexible hard-disk interface.
		These cables are significantly narrower with far fewer pins than SCSI cabling, and are keyed to prevent being inserted into SATA drives or controllers, which makes it easier for vendors to manage server airflow and cooling issues.
		The external versions of these cables are much smaller and cheaper than older parallel SCSI cables, and incorporate the same plug specification as InfiniBand, which was chosen due to the available overhead in the specification and the accessibility of cabling.
	www.networkcomputing.com /showArticle.jhtml?articleID=185303239 (1057 words)

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