Turn to move" of life?D?The D motor technique analysis

For the hard drive technique 纵 horizontal talk the special subject, front two expect us to the head, diskette of the hard drive and connected a people's technique to carry on the introduction, this motor, the data protection that expect us to will introduce the hard drive toward reader, vibrate to keep technique etc..Total to say, the hard drive motor technique is to make hard drive circulate stable, thus carry out to turn sooner soon etc., but the data protection techniques all be the additional technique existence of the hard drive, although they can't bring the direct function to promote for the hard drive, they are important guarantees that the high data of hard drive delivers the rate and high performances.

The life of" turn to move"?D?The D motor technique analysis

Always, the hard drive motors all at use to roll the bead bearings commonly, this kind of bearings motor applied few decades outside, its fresher and clear characteristics is the work noise of the hard drive more and greatly, circulate the stability is not very good, this in the earlier period of the 7200 RPM IDE hard drive body got the full body now.Therefore, start from 2001, hard drive the factory applied the newer liquid bearings motor technique of FDB on the hard drive of IDE in the beginning.

All of the FDB call namely the liquid bearings motor, it is new motor technique that useds for replacing the tradition to roll the bead bearings motor.This new motor allows the higher principal axis to turn to move the speed, and own the much lower work noise, at the same time electrical engineering of FDB also the ability strengthens the quakeproof ability of the hard drive to some extent, thus raising the work stability of the hard drive.In work mechanism, the electrical engineering of FDB drives through a fluid, not the collision of the metals ball and the metals ball that tradition rolls the bead bearings motor is to produce the motive.

In roll the bead motor, roll over the component according to their geometry design with let up the vibration as far as possible.Because these vibrations are sources that produces the noise, also is to cause the hard drive work the unsteady factor, especially in the hard drive of the high disk density, roll the bead vibration more difficult with remove.In addition, at roll in the bead motor, the vibration will cause roll the bead and orbits of bump the shot, as time passes, these orbits change permanence sex, this will cause hard drive of nasty play increment of work noise, also may cause the hard drive electrical engineering principal axis vibrate, thus affect the hard drive work stability.

In the FDB liquid bearings motor, the bearings function were act for by a pimping fluid layer, its height onlies have the mankind the hair silk keep through of very it a.The fluid thin film sprays revolve type to fixed member who infuse the machine and bearings to separate, this will at let up or remove the vibration basically, thus attain the mute operation.In the bearings of FDB, the electrical engineering principal axis passes a larger district that the integration is on the bearings to deliver the vibration, strengthenning the oscillatory buffer ability thus and consumedly.In addition, the fluid still provides a kind of machine damping, thus let up the burden extension to turn, but this is to roll the common and existent problem of the bead electrical engineering.

The motor of FDB crosses the part, the blank slips the demulcent for the fluid

Trace back to the history, motor of FDB in fact as early as 50 year agos have already got the extensive application on the top instrument, however lead the motor of FDB into the hard drive realm, just return 10 affairs of the year agos.Now the motor of FDB also got the extensive application in the hard drive realm, for example the rare jie that everyone very acquaint with new cool fish V, exceed the tuo gold to drill seven Ls department, gold to drill eight etc.s to all adopt the motor of FDB.In the hard drive, after applying the FDB, realize to us the most deep 1:00 is the hard drive work the hour changed the calmness.Along with this technique more and more mature, believe later the FDB will get the more and more extensive application.

End, the here lift the words outside in brief, in hope the publicity material of the jie , we return through see much of a word namely SoftSonic, but rare the company of jie usually contact the FDB together it, for this both have differentiation?In fact motor of SoftSonic namely motor of FDB, just hope the company of jie to a good alias that FDB rise just, so everyone hereafter at look into concerning rare the jie science and technology of related material should notice this.

Invisible value?D?The D hard drive data protection technique

Now, the calculator customers logarithms is very high according to the expectation value of saving credibility.Allow the multiuser even from take no account of the hard drive breakdown and may cause the data throw the circumstance for lose.Though technical progress to make data throw lose the phenomenon increasingly to have already seldom seen, also can't expel its possibility.

Therefore, along with the technical headway of hard drive, the hard drive appeared as follows several sets according to the protection system.Acquaint with nothing is better than for everyone most in the S.M.A.R.T, it is to make use of dependable sex estimate technique to discover the hard drive breakdown in advance, in order to cause the system managing person or the value of the customer, guarantee to come down the data backup before hard drive take place break down.All of Englishs of S.M.A.R.T. call namely the Self Monitor Analysis Report Technology, examine a patient the analysis and the report techniques from the examination, it is is ATA/ IDE and environment of SCSI descend can use of a kind of dependable sex estimate technique.The S.M.A.R.T. is led off the development by the Compaq company, global ex- five hard driveseses produce company currently positive as to it's carry on the without a break development.This ex- five hard driveses produce company is:Rare science and technology of tuo , original company of IBM( this very day sign global saving the technique company), Conner peripherals company( already drive another company and buy), western region the data company and exceed the company of maxtor .( include the original quantum hard drive company)

The technique of S.M.A.R.T is not a new data protection technique in fact, just because it got the extensive application, can support the technique of S.M.A.R.T in almost all calculator systems now, so speakses a few lines in brief and much again in the here writer.The technique of S.M.A.R.T. puts together seven planks of 巧 for the elephant, needing to put together many composite picture exactitudes to pack together, end become a kind of pattern.Such as front say, predict outcome the breakdown is among them a piece of composite picture.Another a cake of is an assurance to belong to sex of method.Belong to sex is a parameter that carries on the dependable sex estimate, being measured the body enactment for various hard drive by the manufactory.Belong to sex for the sake of the assurance, the hard drive designs the diagnosis of the engineers to returned to fix the hard drive to carry on the check, study design important point, correspond for various breakdown establishment that they see to belong to sex.The information that comes from the applied spot can used for predict the dependable sex problem of research, and end bring into the lately dependable sex structure.

Though the different hard drive belongs to each difference of sex, but they still have following some common placeses:

<> Head flight level
<> The data swallows to vomit the function
<> Rise time of xin
<> An area that reallocate count
<> Look for a mistake rate
<> Look for a time characteristic
<> Try the cluster heavy count( spin try recount)
<> The hard drive school is precise heavy try to count( drive calibration retry count)

The top belongs to sex the row is the typical model index sign that several kinds can reflect the credibility.Speak by the root, the design of the hard drive come to a decision which will manufactory make selection belong to sex.Therefore can think, belong to sex difference because of the manufactory, and be decided by the design of the hard drive.

Because of different from the SCSI hard drive logarithms have according to the characteristic request of hard drive of ATA, so when the SFF-8035( May 12 in 1995, the company of Compaq handed over toward the Small Form Factor committee just for the IntelliSafe of the ATA/ IDE development, also be called the SFF-8035) enters the public realm, the S.M.A.R.T. that useds for the environment of ATA/ IDE starts appear.The hard drive of SCSI adopted a different profession standard, such as the ANSI- SCSI Informational Exception Control( IEC) X3T10/94-190 of the medium definition.Apply the ATA/ IDE similar to the system of S.M.A.R.T. of the SCSI environment technically belong to sex and thresholds to be worth, but on report of information not same.

Under the environment of ATA/ IDE, from the on board software of lord born to the S.M.A.R.T" report appearance" order, come from the warning signal of the hard drive to carry on the reading.The host periodically carries on the search to the hard drive, the appearance that to check this order, if the manifestation wants to take place the breakdown right away, send the warning signal to the end customer or systems managing person.The managing person of the system shuts down for the arrangement time, with the backup data and replace the hard drive.This structure can also further improve, can other informations report in addition to hard drive, such as the temperature warning, CD- ROM, magnetic tape, or other Ｉ / Ｏs report etc..In addition to to coming from the " the report appearance" order of the hard drive to carry on the valuation, the main system can also carry on the valuation towards belonging to sex and the warning report.

Generally speaking, the hard drive of SCSI that has the credibility to predict the function reports the condition only intact or appear the breakdown.In the environment of SCSI, carry on breaking down the judgment from the hard drive, then be notified the customer by the host to adopt the measure.There is an examination in the standard of SCSI, being the hard drive certain that the credibility appears the problem, examining to beat up the marking.The system notifies the end customer or system managing person then.

The MaxSafe of the hard drive data protection technique strengthens the version

In addition to everyone the familiar to ear S.M.A.R.T. technique, the each hard drive factory released all and competitively now each from of the hard drive data protection technique, for example the original IBM hard drive company contain technique of DFT, the original quantum hard drive company contain DPS( data protection system), exceed the company of maxtor technique of MaxSafe, western region the data company contain the data bodyguard( the Data Lifeguard) technique, hope the company of seagate the 3 DS system.The writer here again to Maxtor technique of MaxSafe and rare the 3 DS system of the seagate on the synopsis introduction.

MaxSafe( strengthen the version)

The high capacity hard drive of high performance is very important, but the credibility is also a factor that can't neglect, the MaxSafe is a safe system of proprietary data of hard drive of Maxtor.We can know from the hard drive principle, the space that the hard drive inner part is a to sweep very very, comparing the isolation ward of the hospital and still wanting to be clean have to have another, a dinky particle also will result in the data mistake.Though the factories pursue the cleaner manufacturing environment continuously, but adopt regardless how the percolation measure of the high class, still can't keep dust from invade completely, the design of the system of MaxSafe is original meaning be for the sake of before data throw lose, detection and revise these mistakes.

The complete sex judgment of Maxtor data is easy:Identifying and deciding may arise problem a little bit latent, whether MaxSafe check the data first to write in in a moment right or not, then saving process of the data of the monitor long time, among them use to three techniques:The backstage disk surface scan, the deluxe ECC, high speed writes in to probe.

The hard drive head and the sketch map of the diskette

<> The backstage disk surface scan
The ECC provided a string of data, using to translate the code calculate way calculation complicatedly, the oneself affixture at each save in the disk of data up.When you access these datas, the additional additional data will decode to check the data with school, with originality the record compare.If code/ decoding the calculate way probes the difference, will use the ECC to repair inaccuracy of data.The MaxSafe used the idle( spare time) period of the hard drive to read from the disk data, then the ECC of the usage hard drive electric circuit version to verify, the end chases the data of the repair saving in the disk of another 1:00 up, above operation independence in the host system, will not is interfere with by our, made use of each work time of the hard drive well.

<> Deluxe ECC
From 5120 beginnings of the DiamondMax Plus, Maxtor all productses have already included the mistake to detect and revise the ability, compared with the product of the past, being equal to have the dual ECC, the each customer of 512 byte data piece, there will be the ECC school of the 430 bitses to check.The ECC of the old type may appear the correction of the mistake, but the deluxe ECC own the two school to check the operation, making the mistake occurrence rate decline the 20 bitses of 1/10^.To take the 250 KB document read as an example,1 second reads 1 document, a day reads for 24 hours, making mistake time as 150 ten thousand yearses equally.

<> The high speed writes in to probe
Compute with the technique of today, the each inch diskette can save 1,000,000 documents about, while write in data, how the head fly too high, data won't the ability is recorded down accurately.The high speed writes in to probe to used for the check the height that data write in each time, insure the head maintenance in safety write in district.

The seagate 3 D protection system of the hard drive data protection technique( strengthen the version)

The 3 D protection system is the hard drive protection technique that the seagate company possess singly, it includes the hard drive protection, the data protection and examines a patient the protection.But these three protection techniques of the aspects can insure what customer get is the hard drive of the high quantity, high stability.The 3 D Defense System is binding in the seagate hard drive characteristic of a kind of protection means, this can insure the hard drive in vibrate and other adventures act to the customer data of damage.At the same time it still takes to examine a patient the tool to carry on the marking or solve to the mistake of the hard drive by providing the customer.This 3 Ds point is Drive Defense( the hard drive protection), the Data Defense( the data protection) and the Diagnostic Defenses( the theory breaks the protection)

<> The Drive Defense( hard drive protection)

The disk protection includes as follows several generous side:
Protection of G- Force:Can help the seagate hard drive to bear the industry inside tallest not work appearance under of quakeproof level, vibrate the dint to even attain the 350 Gs in the 2 mses, also will not make hard drive damage.
Protection of SeaShield:Provide the ESD and the safety processings, especially to the PCBA( the Printed Circuit Board Assembly) plank.
Protection of SeaShell:This is a kind of hard drive tool that can substitute the original ESD( the Elestro- Static Discharge) to wrap, this will provide more protections and alter the usage for the hard drive.

<> The Data Defense( data protection)

The seagate forerunner's system of Multidrive( SAMS)- the SAMS passes to let up the hard drive to revolve the vibration to let up to damage to the hard drive, mainly including:
ECC( the Error Correction Code, positive code of the mistake check)- provide the on- the- fly to check for the high performance hard drive just, still have is a logarithms to provide the biggest limit firmware( firmware) check according to the instauration just, so data can with right carry on reading and recovering completely.
The Safe Saring- be the hard drive power failure and re- telephone after, this Safe Saring can insure the hard drive head to return to an area, with the assurance data not throw to lose.
The End- to- End Path Protection- insure the data in a complete sex for deliver of the host and disk.

<> The Diagnostic Defense( the theory breaks the protection)

SeaTools- examine a patient the tool software, can the in aid of customer examine a patient system whether the existence problem, and examine a patient whether mistake produce the SeaTools and can avoid the hard drive return to fix consumedly from other hardwares and software or not, to economize the customer expenditure and precious data of customer of protection.It can work in ATA and product of SCSIs, include the all old seagate hard drive.
S.M.A.R.T of strengthen:( Self- Monitoring, the Analysis and Reporting Technology from diagnosis, analyze and report the technique)Can in the hard drive mistake and problem before take place send out the warning toward customer.
The Web- Based Tools:( according to Web tool)Can allow the customer marking and solve some mistakes with related non- hard drive, if virus etc., can also check a system of text, solve the hardware conflict to return by avoiding the otiose hard drive to fix.
DLD( the Drive Logging Diagnostics)- succeed in catching and can't recover sex data mistake, substantially is to hand over the with each other sexual diagnosis work.
The data protection system of the hard drive, is each hard drive necessary, the hard drive that loses the data protection system has no use value.But for the sake of more convenient and end customer usage, many hard drive factories all write in the tiny code of various protection system in the hard drive firmware, the customer can pass to renew the firmware to get the latest data protection technique and vibrations to protect system etc..Moreover, hard drive the factories return to use for the convenient customer, all owning the additional diagnosis procedure, it is a customer to examine a patient the healthy condition of hard drive to connect, these procedures are a lot of, for example the PowerMax that the DFT( the Disk Fitness Test), company of Maxtor that company of IBM release release, western region SeaTools etc. that the Data Lifeguard( the data bodyguard tool wrap) and the seagate companies that the data company release release.

Concerning the concrete operation method and related elucidations of these tools, the reader can consult related article of the saving line.

Knot the predicate

Progress along with science and technology, the hard drive technique also at change with each passing day, is our vailable hard drive capacity now for the body of the end customer more and more big, the speed is more and more quick, circulated to stabilize more and more.But the all theses are all new technical direct performance of hard driveses, have no renewal head and the diskette techniques, a capacity of hard drive can't become to enlarge doubly;Did not connect a people's technique and a capacities newly, the data of the hard drive deliver the rate and also can't become to promote doubly;There are no more advanced data protection technique and vibrations protect system, hard drive also can't under the condition of sooner greater not appear the data to throw to lose or the phenomenon of the hard drive damage.

We at the time of enjoying the new hard drive to bring various each kind advantage, in fact also be at experience personally new technical direct benefits of hard drive.Saving start from now on, saving also is from new technique beginning.