All this JAZ

All this JAZ

Test Lab Game.EXE estimates removable drives

It would seem, until recently any amount required for the complete happiness "average user" Information could carry boxes with a single three-inch floppy disks. Until recently … When gigabyte (scary thought!) Hard drive cost several thousand dollars and was something cosmically distant, when none of the "rank and file" users and could not imagine that she will come brutally golden time when you are angry and swearing, rumors that something like damn the day I bought this pathetic 2.5-gigabyte Maxtor, which does not fit!

Yes, there were times … And if the issue of storage of all this information Prorva more or less solved through today, fortunately, dramatically cheapened large hard disks, it is the question of its transfer from one computer may still respond headache.

Of course, you can take with the same "screw"… But, you see, hard drive — a device gentle and touch it unnecessarily — a more expensive (shakes, temperature, etc. — all this can easily disable it). Note also that the vast majority of users (gamers, of course, does not count) in the head does not fit, "as it can spin the computer, remove the hard drive and from there, you know, take it to an unknown destination. Horror! .."

(Yes, there are special "slide"That is just used to quickly connect the hard drive. But this is hardly like a panacea: hard disks really different purpose!)

A reasonable question: and what do you do if, say, the edge of how to quickly move from place to place 500 megabytes of sensitive files?

A reasonable answer is: you must start at home an appropriate device which in general can be called a removable storage device (another option — mass-storage device). It is advisable to secure (do not forget: to store and move!), Preferably relatively cheap (something to S800, at which we were guided in his research), preferably convenient to install and operate (stuck at the port — and raced), it is desirable performance. The latter, as you might imagine, it is equally important: to sit the whole day waiting for the device to read / write these notorious "floor gig"- Not everyone would agree.

In the assessment of these characteristics (reliability, convenience, price-performance) removable storage, and were thrown into the strength of our lab, and we dare to hope that text, the results that are shown below, though a bit will allow you to navigate the abyss of additional devices to transfer and storage, full of computer with which the markets and shops of the capital and Russia.

Yesterday

The progenitor of the devices, which we are discussing today was … trivial floppy disk, simply — the usual floppy disk, is still faithfully serving mankind computerized. You probably do not remember the 8-inch disks. And 5-inch floppies a thing of the past. But the reliability of storage they could give odds to any 3.5-inch cobraty. So, one of us lie distributions, working from the middle of the 80s …

But the computing community for a long time "increased" of the volume of a floppy disk, and has become a standard 3.5-inch drive is now mostly used as a boot device.

(By the way, in addition to floppy disks, there are many other magnetic storage devices. Thus, undertaking this survey, we wanted to focus on tape drives, tape cartridges. They are most often used to store information. The penultimate word is selected for good reason: very low speed data transfer allows tape drives claim to be anything more. But in class it is very convenient and reliable device, and the life of the gamers without them, figuratively speaking, would be miserable and boring. So in the future we will definitely return to the consideration and testing of streamers, the number of models which also exceeds all reasonable limits.)

Here and now: that we tested

MAGNETOOPTIC tested and magnetic removable drives. That is: a) they are not too expensive, and b) allow a momentary transfer of large amounts of information, c) allow quite reliably store information (giving the user the ability to timely release the cherished few hundred megabytes of hard disk space), d) productive.

In order to identify the technical characteristics of storage and comparison of specific models, we measured the speed of reading and writing data, and defines the access time (seek time + time turning the disk to read the data). These parameters describe exhaustively researched device.

Testing was performed on a computer with a Pentium 166, 16 MB EDO-memory motherboard Asustek t2p4-SCSI-adapter Adaptec 2940 Ultra Wide. The configuration of the motherboard and the LPT-port were placed on the BIOS manufacturer (bios defaults). SCSI-device is connected only. System loaded in the minimum possible configuration, and then determines the speed of writing and reading data stream. To measure the total volume was selected data equal to 100 megabytes. When using large capacity drives parameters were measured with an empty vehicle, when it is 50 percent full, and when full. The data were averaged. To measure access time was used a special program benchmark VVSEEK.

The measurement results are summarized in the tables that are presented to your attention below.

Installation ustroystv_

It is customary to talk in detail about the installation of a device, but given that the vast majority of the test drives have interfaces SCSI, special differences in their installation was not observed. However, the comment is still needed.

Almost all models of SCSI-adapter has a function of representation of SCSI-devices such as additional logical drives. This will not require any additional drivers or utilities that greatly simplifies the operation of the equipment under MS-DOS.

Under Win’95 using SCSI-devices are also no problem, because the system auto-detection (plug&play) she finds all reappear "iron". In other words, with SCSI-devices you basically will not have installation problems.

As for the other (non-SCSI) devices, we are talking about them, discuss the process of installation, making it a distinct.

Magneto-optical drives

Externally MO drive is very similar to a conventional 3.5-dyumo8y drive. The information is recorded on the disc enclosed in a hard plastic cover. The envelope is provided with "Castle" prohibition of recording and the metal shutter, sliding by placing the disc in the drive and thereby provides access to a read-write head to the carrier. Visually design disc recalls painfully familiar floppy 3.5". But only visually! During operation, the drive is no direct contact heads and magnetically surface. This ensures the minimum probability of media failure. MO drives virtually indestructible working layer.

They are safe for exposure to electromagnetic fields, and increase / decrease the temperature. The term preservation of the information recorded on such a diskette, estimated developer, is not less than 15 years.

According to the standards ISO, minimal raw capacity 3.5-inch drive is 128 megabytes, and 5.25 — 1.2 gigabytes. Now available 3.5-inch hard drives with a capacity of 640 megabytes. The capacity of the 5.25-inch drives can be up to 2.6 GB or higher.

As you can notice, magneto-optical disks combine the three major advantages: a high degree of reliability, flexibility (because of a single standard) and low cost (the average price of a disc 3.5" volume of 640 MB is less than $ 40).

Thanks to such characteristics of the disks themselves, this type of drive is perfect for storing and transferring large amounts of data, and the relatively high speed of these devices makes them comfortable to work with software applications. However, if we compare the performance of MO drive with the speed of the overwhelming majority of hard drives, the results are clearly not in favor of the magneto. But this is the only and the main drawback of such drives.

Principle of operation_

The work requires the use of magnetic storage and optical technology. Data storage is based on the ability of the working layer of the disk to store the magnetization in normal conditions, almost no reaction to the influence of external fields, and acquire the ability to magnetization reversal at a local increase in temperature. During recording, a laser beam focused on a microscopic area of ​​the working layer, heats it to a temperature at which the magnetization reversal is possible. Then, the magnetic head generates a magnetic field that changes the magnetization of the zone, thereby producing record data.

Reading the recorded data it is based on the Kerr effect. It is to dynamically change the plane of polarization of the laser beam reflected from the surface of the magnetized layer. The direction of rotation of the plane of polarization depends on the direction of magnetization of the disc surface. Thus, previously recorded information can be read. Typically, reading is performed using the same laser that record, but running at low power. It should be noted that in the magneto-optical drives of recording is carried out mainly in two passes. First pass cleans the surface of the disk, then there is the process of recording. Clearly, this is not the best way affects the performance. But now a number of companies have developed a new type of floppy disks that can record in a single pass without going through the process of demagnetization. The real benefit there may be 30 or more per cent of the total recording time.

Proizvoditeli_

Obviously, the market is much richer western Russia, and there you can find a great variety of titles. However, the direct production of MO drives occupy a relatively small number of firms. Among them, Epson, Chinon, Fujitsu, Panasonic, Sony, Ricoh, Olympus, Matsushita, TE AC, Pinnacle, MOST (Mass Optical Storage Technologies). Many companies (eg, Fujitsu) supplied by the drive to other companies, and later used the symbolism of resellers. Of the major resellers can call Maxell, Philips, Verbatim, Maxoptix.

What should I look for when pokupke_

When you select a drive it is necessary to take into account the features of specific models. For example, if you plan to buy a modern 3.5-inch drive that supports volume of 640 megabytes, keep in mind that your friends have provided initial 128-megabyte or 230-level will not be able to use your disk. However, you can always be considered at the data from their MO diskettes.

Do not fall into a mess with the interface! Most models are equipped with a "serious" highway as SCSI. Recently, however, appeared low-cost model, performed in "nation-wide" IDE-interface. What is indirect evidence "penetration of this type of drive in the masses".

Drawing attention to the "boxed" data devices, keep in mind that manufacturers often point average is not "access time", a "Time Search" (only positioning time). Last virtually meaningless in a slow rotation of the disk.

No less important characteristic is the drive cache size. Cheap models usually have a standard 256 kilobytes, whereas it is always better to have something more …

Fujitsu M2513

SCSI, 640 MB, built-in model

The drive showed itself in our testing well. Occupying one of the first places on speed (see. The relevant table at the end of chapter), it is also one of the most inexpensive devices in its class (640

MB). Of course, this puts him head and shoulders above all the other drives.

Equally important is the reliability of the traditional drives Fujitsu.

In short, this model is rightfully deserved and "Our choice"And "Best buy".

I would like to draw your attention to a very nice detail: the front panel has an additional shutter closing drive in the inserted state. This prevents dust from entering the drive when it is actively being used.

Maxoptix 640s

SCSI, 640 MB, built-in model

Strictly speaking, this is an option Maxoptix Fujitsu drives M2513, with the only difference being that it is written on the box Maxoptix. As expected, the characteristics of the drive remained virtually unchanged, so everything said in the address of the original Fujitsu refers to this run.

Pinnacle Micro Tahoe

SCSI, 640 MB external model

This external model magneto-optical drive Tahoe from the company Pinnacle Micro is striking in its prohibitive cost. This drive even more inferior, mainly on reading speed, similar in terms of the model Fujitsu M2513, which we discussed above.

In all other drive we liked. I would particularly like to note its extremely pleasing appearance and smooth out the floppy disk.

Fujitsu M2541B

IDE, 230 MB, built-in model

Of all tested magnetooptics this model showed the lowest results in performance. What WPRO-it is not surprising, given the IDE-interface of ustroyva. Performance speed, but it does M2541V interface is very attractive purchase. Those who want to buy an inexpensive magneto and no plans in the near future to shell out for SCSI-adapter, you can safely recommend it M2541V Fujitsu drives. Especially if you plan to mainly store data on it, and not regularly rewritten. With the exception of the low-speed drive has caused us only pleasant feelings. In particular, it is very convenient and accurate removable front panel. Structurally, the drive itself also impresses well-protected devices. However, about the reliability of Fujitsu drives we have said.

As for installation, then the DOS’om the drive without any problems in bios’e gained independence and was presented as the standard IDE-devices. No questions had arisen and under Win’95, which is also a plus when it Domash-use of this drive.

Olympus PowerMO S330E

SCSI, 230 MB, built-in model

The model has exceeded all our expectations! We can confidently say that this is one of the best 230-MB magneto-optical devices. Firstly, it is quite respectable performance on recording speed and excellent values ​​by reading information (see. Table). Plus, this model has a high speed access, which makes it one of the most effective when working with various software applications.

Although the actual drive in PowerMO S330E made in 3-inch form factor, it is supplied to the assembly

"skids" and the front panel, intended for installation in the compartment 5". This is due to the fact that the re-switch SCSI-address, you worn-out of the middle accumulate and are not mounted on the board on a large- "salaz-kah".

A small frustration can deliver unless the front panel. The fact that the disc is inserted ^ extremely inconvenient. But this is one of the troubles with which you can easily accept.

Olympus PowerMO S332S

SCSI, 230 MB external model

PowerMO S332S its characteristics almost identical to the previous model built. But this time, it is an external drive. And to say here I would like above all about the special adapter SCSI / LPT, included with the device. With it, you can easily plug into any computer with a LPT-port, which is very convenient. You only need to install a floppy disk with a special driver. Make it very simple, and no problems during the installation process does not occur.

But use the mode SCSI / LPT, we recommend that only when you need to transfer information to a computer, where there is no corresponding MO drive. Otherwise, the performance speed drive fall down to the level of "frightfully".

In summary, we note that the mo-del is most useful to users who hunt for the permanent production of new and new infor-mation and "prone" to work on different kompyutepax. That is our brother gamers. Hence "Our choice". We believe that an important role in the acquisition of this remarkable US-corder play and stylish fu-tourist design. Plus — using a special cradle drive can be installed not only on a plane but also in the right / left side. A trifle, but nice.

Aggregators removable magnetic disk

Fundamentally considered magnetic disk can be divided into two major groups, namely devices that operate on the principle of a conventional magnetic floppy disks and drives, is a kind of construction "collapsible" hard drive. In other words, the first device using the flexible magnetic media, the latter — rigid. It is clear that to stop work on the physics of these drives do not need to — the first case is obvious, and the second, we have already discussed — see. Drives in the overview of the # 3’97.

Manufacturers

In our field of vision were magnetic disk of two competing corporations — Iomega and SyQuest. Strictly speaking, the products of these manufacturers and the market is limited.

Zip drives and SyQuest

Drives Zip (Iomega) and SyQuest (manufacturer of the same name) in common primarily single purpose. Both devices are designed for the daily transfer of information. The average cost of drives and drive themselves to them very close, allowing us to put those drives in a row.

Zip belongs to the category of contact devices: a magnetic head directly touches the surface of the disk in the recording process. Therefore, a high degree of reliability can not speak. That is why these devices should be used solely for data transfer, but not for storage.

Zip uses floppy disks with a capacity of 100 megabytes (other volumes are not there). Available models Zip interface LPT, SCSI and IDE. One of the major drawbacks that prevent it completely displace conventional drive B floppy drives, it is that Zip — it’s more internal standards.

Drive SyQuest. In relation "price per megabyte" This drive is certainly the most expensive. At the same time, the volume of SyQuest drives much more than what is used in similar drives Corporation Iomega. However, the prevalence of weak SyQuest’oB not allow us to assert that it is absolutely bargain.

Devices Jaz, SyJet_

The principle of operation of these drives from different companies (or Iomega and SyQuest) is exactly the same: in fact, it "collapsible" drives, read heads which are located inside the drive, and the magnetic media is enclosed in a special cartridge. It is due to the hard drives of similar design and achieved such an impressive data transfer rate (see. Table below).

The main difference between SyJet Jaz, in the amount of drive: Iomega products from it is 1 GB, SyJet-wheels over half a gigabyte.

The protection system drives Zip and Jaz_

Both of these devices from Iomega’s have one curious feature, which might be useful for some customers. The thing that drives them no mechanical write protection, but with the help of a special program you can put special passwords — how to write and read from the disk. This is very handy if you have even the minimum necessary to protect their own data.

Iomega Jaz

SCSI, 1 GB, external model

Jaz "agile". Of course, it can hardly be put on a par with models of fast hard drives, but for the class he showed extremely good results. As for the internal structure of Jaz, then, as we have said, it is a edakii "collapsible" Winchester. That, obviously, can not affect its reliability. In particular, the go-nimble drive inside is not very well protected from elementary dirt. But the main hard-st-occurs when Hrane and Using Jaz-disks. This requires not about one hundred careful and cautious. Magnetic field gradients humidity etc. "cataclysms" can significantly affect the reliability of the drive. Fallen Jaz-drive — this is guaranteed to drive inefficient.

Quite high and the cost per megabyte of Jaz-. So advise this purchase possible unless those who really intends to regularly carry vast amounts of information.

Do not forget that Jaz has to be on "the other end"… Or at least a good SCSI-adapter, if you use an external model Jaz.

Iomega Jaz

SCSI, 1 GB built in model

This model is only slightly different from its external counterpart. Non-despite the fact that in all the tests it has shown the hall a few thin-Chiyah results (see. Table), in general we can say that it is by and large the same Jaz, only the internal performance.

When buying, however, note the color of the front panel. Toxic green, how it can improve the appearance of your computer (poisonous green) and disfigure it. Be careful. (Or maybe that just wonderful color caught us? ..)

SyQuest SyJet

SCSI, 1.5 GB, built-in model

SyJet similar Jaz’y. Rather, on the contrary, although it is not so important. Fundamentally different. With all the same under-STATCOM as Jaz, given Nye company SyQuest drive model is endowed with a number of neospo — soluble advantages. Firstly, the volume of the disk — a half-gi megabytes to one, with the cost of Jaz- and SyQuest-disks — comparable magnitude. Secondly, SyJet seriously outperforms its speed characteristics Jaz (see. Table).

Iomega Zip

LPT, 100 MB external model

Frankly, external Zip with LPT-interface we have a little disappointed. And it’s just a slow interface. On the other hand, this model is indispensable if "adopted" the computer does not have a Zip-drive (any version). (The rest "fans" Zip command, we recommend you opt for one of the internal model is similar to the drive, which will be mentioned below.)

Note ease of installation of the device. Dost sure to connect one cable and run a special pro-gram — and has accumulated Tel fully operational. At roughly the same-opepa-tion must be pro-guide and under Win’95, but with other software, which is also supplied with Dry-tion. (Again — all the above is true for internal models.)

Oh, I almost forgot to say about the lack of a small model: design features storage device such that the drive when you remove it could simply jump on the table.

Iomega Zip

SCSI, 100 MB, built-in model

Unlike B LPT Zip, the model showed quite decent results (see. Tabley-tsy). Thus, it is quite possible to re-recommend to the entire "supporters" SCSI. And do not worry if you do not have SCSI-adapter: though mediocre, it is in the set with the drive.

Iomega Zip ATAPI

IDE, 100 MB, built-in model

This model uses a Zip- "nationwide" IDE-interface and only slightly loses its speed SCSI-analog. At the same time it is cheaper! Collectively, if you decide a-chestnut choice on Zip, something for the home — vari-ant perfect. Pro-tra mixture ease of instal-lation Iomega’s products we have already said. By the way, Zip is good for the fact that every month is becoming more and more popular. This means that … ^^ ^ P ^ SH however, is clear. Plus, again, comfortable and nice IDE-interface. In short, "Best Buy".

SyQuest SQ3105S

SCSI, 105 MB, built-in model

The model has proved itself good at testing. Recording and especially reading and put it in front of all tested Zip’ov, it is currently the main competitors of products from SyQuest. Take also into account very similar price.

Not only pleases the extraordinary noise of the drive. Surprisingly, model SQ3270S (See below.) Were ideal in this respect.

Another disadvantage of the drive. To place a disc in the drive has a special lever that you want to withdraw before the end. With its help the disc is ejected to the outside. In practice, it is very inconvenient! Unfortunately, this common flaw of all similar models of SyQuest-mo (including follow-ing on the list). Finally.

By purchasing this model, note that follows from an examination of on-drives use 270- megabyte disks is not so much different in price. A hint is clear?

SyQuest SQ3270S

SCSI, 270 MB, built-in model

There is no fundamental difference in the characteristics of the previous model. But, as already mentioned, the wheels SQ3270S almost 3 times roomy. In short, it seems that choosing SyQuest, should choose this model.

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