The road- string of the future of the hard drive of IDE goes the ATA

The hard drive connect to connect hard drive with the conjunction module of the host system namely, defining so in save on-linely 《 small thesaurus of hard drive 》 :" Connect is the conjunction mold piece of the hard drive and the host system, connect the oscular function is to save the hard drive data slowly inside of data deliver to the computer host memory or other applied systemses in.Connect a people's type and there will be differently different and biggest connect a people's bandwidth, thus affect the rate of speed that the hard drive delivers the data to some extent."

The Serial ATA( the string goes the ATA)

Say for the hard drive of IDE, connect a new technique also is a Serial ATA nothing but.The Serial ATA Chinese literal translation come over also is a string of to go the ATA, it with extensive and adoptive currently of ATA/100 or ATA/133 etc.ses connect the most basic dissimilarity of to lie in, all ATAs of hard drive connect a people's typeses before are all adoptions to proceed together the way to carry on the data correspondence, as a result know together as to proceed together the ATA( the Parallel ATA).And the Serial ATA, elfevident, also is to adopt the string to go the way to carry on data's deliver.

The technique of Serial ATA is to be started in 2000 by the company of Intel at the earliest stage, purpose is connected the oscular new hard drive to connect a people's technique for the Parallel ATA that replaces to use extensively currently,1.0 namely the first formal versions of the Serial ATAs established formally in 2001, but announced that the second string of Serial ATA of formal version went the standard again in 2002 beginning of year SerialATA committees.Currently the SerialATA committee the member includes these sixes of the APT Technologies, Inc, Dell Computer Corporation( wear the computer of er ), IBM Corporation, Intel Corporation( company of Intel), the Maxtor Corporation( exceed the 拓 hard drive company) and the Seagate Corporation( rare science and technology of jie )s.

See from the data of the Serial ATA committee announcement, to 2007, in the third generation string go technique of ATA, the saving system of personal computer will have tallest amount to the data bandwidth of the 600 MBs/ s, for a development blue print that goes the ATA, such as the table 2 show.But concerning the string go the ATA with proceed together the ATA of the technique characteristic contrast, please see the table 3.

Figure 4:Proceed together the ATA system conjunction constitution sketch map

From above of in the technique characteristic contrast, we can see a string go the ATA have the like and next characteristics.First, a data that goes the ATA delivers the rate to compare current abreast the ATA is high, so will for the customer bring more" the pole shots up soon" of experience.

The next in order, the string goes the ATA in the system more and in brief, but expand sex but very strong.Because in the Serial ATA standard, ideal appearance under need four needle feet and can complete all works only, one needle power supply,2 needles connect the ground,3 needles be the data to send out to carry,4 needles act as the data to receive to carry.Order to deliver the agreement towards order thus because of the Serial ATA usage moreover, so nonexistent lord/ from the problem, and each actuator enjoys the data bandwidth only.Thus, the customer also do not need again for establish the hard drive lord from jump the line machine but distress;Moreover, the string goes the adoption of ATA to order to deliver the mode towards order of, so the string go the system and won't be subjected to again to be limited by the single passage and can link two pieces of hard drives only.

The string goes the ATA so far have not yet got the large-scale application, the main current of the market is abreast ATA representative person Ultra ATA/100 still.However several hardware factories( include a factory, main plank factory of chip, hard drive factory) all mean, they will believe in the related system that 2003 release to support string's go the ATA till then, the string go the system of ATA in the market full general everywhere it is thus clear that.

Concerning more contentses of the Serial ATA, the reader can also consult 《 the road, the Serial ATA technique analysis and the market analysis of the future 》 .

The hard drive of SCSI connects a people's technique- Ultra320 SCSI lately

Introductive Serial ATA of top mainly is apply in the personal computer system of hard drive connects a people's technique, but face to the server realm to connect lately technical representative's person of is an Ultra320 SCSI.The Ultra320 SCSI is a kind of new SCSI to connect a people's standard.The SCSI is already near to have the history for 20 years, have complete of backward and permit sex and good forward and permit sex.About each through time of about two years, will do some small improvements to that standard, to raise the speed, credibility and easy management.The result that the Ultra320 SCSI is the latest to modify once, it carry out simple easy, the risk is small.

At the time of strengthenning the credibility and easily take care of reasonableness, the baud rate exaltation of the Ultra320 SCSI is its precursor Ultra160 SCSI of 200%.All improvements enter sex gradually of, is also an equipments of SCSI that says that the equipments of Ultra320 SCSI and lists carry the breadth and narrows backward and permit.The ASCII association T10 committee defined the Ultra320 SCSI in the SPI-4( the SCSI connects abreast) standard.The SPI-4 standards are to be turned into the development by existing standards SPI-3s since then.

The database server, RAID, the sound video frequency edits following advantage that the system, work station and high level table's top systems will be subjected to the benefit in the Ultra320 SCSI:

<> The baud rate is the Ultra160 SCSI of 200%, come to an each 320 MBs/ second.
<> With existing Ultra2 SCSI, the Ultra160 SCSI electric cable conjunction and permit, be easy to gather.
<> The Ultra2(80 MBs/ second), Ultra160(160 MBs/ second) and Ultra320(320 MBs/ second)s can install at the same time at a total and on-line, will not cause the Ultra320 equipments function to descend.
<> Passed the wrong ability of the exaltation check 纠 to strengthen dependable sex of the product.
<> Have the ability that the supervision connects a people's function and tallest dependable baud rate.
<> Used for the electric cable length of an equipments' can amount to 25 meters, the electric cable length that useds for two or several equipmentseses can amount to 12 meters.
<> The support amounts to 15 more devices.

Currently, have already appeared the part to support the product of the Ultra320 SCSI on the market, mainly include the hard drive control card and hard drive of SCSIs.For example exceeded a son of 拓 to release the Atlas 10 k IV of the support Ultra320 SCSI, and the rare jie , day sign, the Fuji an etc. business enterprise also all released related hard drive product of the support Ultra320 SCSI.

The choice- SCSI- FCP of the high level( FC- AL, fiber-optic passage)

At past 23 yearses in the middle," the information superhighway" says that the concept of" numerical superhighway" has already caused the people's extensive concern and become the main contents of the news report way perhaps, this mainly is because of output and mental idea of those attractive choice of wordses.Say for the ordinary people, imagine very easily a spacious, open of, eight superhighway of driveway, have the data unit( such as video frequency and picture) of different type up for the elephant bus, the truck is similar to the small automobile is on the superhighway to drive onto each place in the world by leap and bound.

Unfortunately is, although usually use this to read aloud all in compute world, how carry out the information superhighway practically fresh mention.The technique solution that it use not only wants to be vivid ands cheap, and but also needs to have the characteristics of the high performance to support the very high data baud rate.A kind of aim at to resolve these problems, but did not cause the extensive and advertent solution to still is a kind of newer technique, call the fiber-optic passage.

Fiber-optic passage already drive the ASCII association( ANSI) adoption, is the industry standard to connect.Usually the people think that it is system and systems or of the system and sub- system connects the structure with each other, it installed the way to adopt the fiber optic cable conjunction between the system towards order( or exchange) of by order.Certainly, at the beginning the people are to conceive thus of, in numerous agreement that establish for it, only have the IPI( the intelligence establishes to connect outside) and IP( the net zi agreement)s are ideal in these install.

The development of the afterwards fiber-optic passage bagged the electronics( not optical) realization, and can include the hard drive with the opposite and lower method of cost at inside of many equipments link the host port.Gather a complement to be called the fiber-optic passage to arbitrate the wreath( FC- AL) to this bigger and fiber-optic passage standard.FC- AL the one who make fiber-optic passage can be the hard drive conjunction to connect directly, for high swallow to vomit the design of measure a system of function developped an exaltation../ The path of the i/ O function level.The SCSI-3( the small scaled calculator system connects-3) hases already is define to negotiate for the hard drive, also ising be called on the technique the agreement of SCSI- FCP( fiber-optic passage agreement) of the FC- AL.

For the low class function such as establish the conjunction outside to say, the fiber-optic passage is too expensive and waste the energy.But say for the big and medium-sized calculation system, the fiber-optic passage hases already become to choose of connect.At the same time, the calculator profession uses the SCSI experience to tell that we want to prolong the electric cable distance, toing have the vivid, toing reduce the total expense of instruction, toing support the array function and toing strengthen can connect sex.But these say for the SCSI, there is very explicit restrict, but for fiber-optic passage, the vivid gets to strengthen consumedly, such as the table 4 and table 5.