A rare and happy combination thin waist And big breasts went to Salma Hayek! The actress, who has never had plastic surgery, emphasizes her dignity in every possible way - she loves tight-fitting dresses and things with deep neckline. Of course!

Kate Upton

Model Kate Upton has said more than once that she would prefer to have smaller breasts, despite the fact that many girls dream of this lush bust like hers. “I just dream of small breasts every day! I dream of wearing tank tops with thin straps and not wearing a bra underneath. Life is much easier with size 1 breasts,” Kate said in an interview.

Kelly Brook

Kelly Brook is the proud owner of size 6 breasts! And everything is natural, of course. True, the British model herself, like her colleague Kate Upton, is not at all happy about this. According to Kelly, her large breasts mean she can't wear the dresses she likes - which is a shame!

Scarlett Johansson

Scarlett Johansson has naturally prominent breasts, but there are rumors that the actress has even reduced them! True, Scarlett herself never gave any comments about plastic surgery- fans can only guess whether this is true or not.

Christina Hendricks

But actress Christina Hendricks is very proud of her curvy figure: it seems that in Christina’s wardrobe you cannot find a dress that would not emphasize her magnificent breasts.

Amber Rose

Curvy girl Amber Rose has everything: breasts and butt. To say that Amber is simply proud of her virtues is to say nothing! In any case, we rarely see the model in clothes: Amber prefers to be naked even in public.

Anna Semenovich

The debate about the very magnificent bust of Anna Semenovich did not subside for quite a long time: natural or not? We, of course, take Anna’s word for it - only nature can bestow such luxurious breasts.

Sofia Vergara

Sultry beauty Sofia Vergara is the owner of not only a beautiful figure, but also magnificent breasts. Sofia herself speaks about her bust with irony; in an interview with one of the glossy publications, she stated: “My boobs are simply huge. Buying a bra has always been scary. When I moved to Los Angeles, the first thing I did was look for places like Frederick's that made bras for strippers. There’s nothing good about big breasts: when I lie down, they reach my chin!”

Today, a common storage device is a magnetic hard drive. It has a certain amount of memory designed to store basic data. It also has a buffer memory, the purpose of which is to store intermediate data. Professionals call the hard disk buffer the term “cache memory” or simply “cache”. Let's figure out why the HDD buffer is needed, what it affects and what size it is.

The hard disk buffer helps the operating system temporarily store data that was read from the main memory of the hard drive, but was not transferred for processing. The need for transit storage is due to the fact that the speed of reading information from the HDD drive and the OS throughput vary significantly. Therefore, the computer needs to temporarily store data in a “cache” and only then use it for its intended purpose.

The hard disk buffer itself is not separate sectors, as incompetent computer users believe. It is a special memory chip located on the internal HDD board. Such chips can operate much faster than the drive itself. As a result, they cause an increase (by several percent) in computer performance observed during operation.

It is worth noting that the size of “cache memory” depends on the specific disk model. Previously, it was about 8 megabytes, and this figure was considered satisfactory. However, with the development of technology, manufacturers were able to produce chips with larger amounts of memory. Therefore, most modern hard drives have a buffer whose size varies from 32 to 128 megabytes. Of course, the largest “cache” is installed in expensive models.

What impact does a hard drive buffer have on performance?

Now we’ll tell you why the size of the hard drive buffer affects computer performance. Theoretically, the more information is in the “cache memory”, the less often the operating system will access the hard drive. This is especially true for a work scenario when a potential user is processing large quantity small files. They simply move to the hard drive buffer and wait there for their turn.

However, if the PC is used to process files big size, then the “cache” loses its relevance. After all, information cannot fit on microcircuits, the volume of which is small. As a result, the user will not notice an increase in computer performance, since the buffer will be practically not used. This happens in cases where the operating system will run programs for editing video files, etc.

Thus, when purchasing a new hard drive, it is recommended to pay attention to the size of the “cache” only in cases where you plan to constantly process small files. Then you will really notice an increase in the performance of your personal computer. But if the PC is used for ordinary everyday tasks or processing large files, then you don’t need to attach any importance to the clipboard.

Choosing a hard drive for a PC is a very important task. After all, it is the main repository of both official and your personal information. In this material we will talk about the key characteristics of HDD that you should pay attention to when purchasing a magnetic drive.

Introduction

When buying a computer, many users often focus their attention on the characteristics of its components such as a monitor, processor, and video card. And such an integral component of any PC as a hard drive (in computer slang - a hard drive), buyers often purchase, guided only by its volume, practically neglecting other important parameters. However, it should be remembered that a competent approach to choosing a hard drive is one of the guarantees of comfort during further work at the computer, as well as saving money, which we are so often constrained by.

A hard drive or hard disk drive (HDD) is the main data storage device in most modern computers, which stores not only the information needed by the user, including movies, games, photos, music, but also the operating system, as well as everything installed programs. Therefore, strictly speaking, the choice of a hard drive for a computer should be treated with due attention. Remember that if any PC element fails, it can be replaced. The only negative point in this situation is the additional financial costs of repairs or purchasing a new part. But a hard drive failure, in addition to unforeseen costs, can lead to the loss of all your information, as well as the need to reinstall the operating system and all required programs. The main purpose of this article is to help novice PC users choose a hard drive model that would best meet the requirements that specific “users” have for their computer.

First of all, you should clearly decide in which computer device the hard drive will be installed and for what purposes you plan to use this device. Based on the most common tasks, we can conditionally divide them into several groups:

• A mobile computer for general tasks (working with documents, surfing the World Wide Web, processing data and working with programs).
• A productive mobile computer for games and resource-intensive tasks.
• Desktop computer for office tasks;
• Productive desktop computer (working with multimedia, games, audio, video and image processing);
• Multimedia player and data storage.
• For assembling an external (portable) drive.

In accordance with one of the listed options for using your computer, you can begin to select a suitable hard drive model based on its characteristics.

Form factor

Form factor is the physical size of the hard drive. Today, most drives for home computers are 2.5 or 3.5 inches wide. The first, which are smaller, are intended for installation in laptops, the second - in stationary system units. Of course, if desired, a 2.5-inch drive can be installed in a desktop PC.

There are also smaller magnetic drives with sizes of 1.8”, 1” and even 0.85”. But these hard drives are much less common and are aimed at specific devices, such as ultra-compact computers (UMPCs), digital cameras, PDAs and other equipment where small dimensions and weight of components are very important. We will not talk about them in this material.

How smaller size disk, the lighter it is and the less power is required for its operation. Therefore, hard drives of the 2.5" form factor have almost completely replaced 3.5-inch models in external drives. After all, large external drives require additional power from an electrical outlet to operate, while the younger brother is content only with power from the USB ports. So if you decide to assemble a portable drive yourself, it is better to use a 2.5-inch HDD for these purposes. This will be a lighter and more compact solution, and you won’t have to carry the power supply with you.

As for installing 2.5-inch drives in a stationary system unit, this solution looks ambiguous. Why? Read on.

Capacity

One of the main characteristics of any drive (in this regard, a hard drive is no exception) is its capacity (or volume), which today in some models already reaches four terabytes (one terabyte has 1024 GB). Just 5 years ago, such a volume might have seemed fantastic, but current OS builds, modern software, high-resolution videos and photographs, as well as three-dimensional computer video games, having a fairly significant “weight,” require a large hard drive capacity. Thus, some modern games require 12 or even more gigabytes of free space on your hard drive to function properly, and an hour and a half HD movie may require more than 20 GB of storage.

Today, the capacity of 2.5-inch magnetic media ranges from 160 GB to 1.5 TB (the most common sizes are 250 GB, 320 GB, 500 GB, 750 GB and 1 TB). 3.5" disks for desktops are more capacious and can store from 160 GB to 4 TB of data (the most common sizes are 320 GB, 500 GB, 1 TB, 2 TB and 3 TB).

When choosing HDD capacity, consider one important detail - the larger the hard drive capacity, the lower the price of 1 GB of information storage. For example, a 320 GB desktop hard drive costs 1,600 rubles, 500 GB - 1,650 rubles, and 1 TB - 1,950 rubles. We calculate: in the first case, the cost of a gigabyte of data storage is 5 rubles (1600 / 320 = 5), in the second - 3.3 rubles, and in the third - 1.95 rubles. Of course, such statistics do not mean that it is necessary to buy a very large capacity disk, but in this example it is very clear that buying a 320 GB disk is not advisable.

If you plan to use the computer mainly for solving office tasks, then a hard drive with a capacity of 250 - 320 GB, or even less, will be more than enough for you, unless, of course, there is a need to store huge documentation archives on the computer. At the same time, as we noted above, buying a hard drive with a capacity below 500 GB is unprofitable. By saving from 50 to 200 rubles, in the end you get a very high cost one gigabyte of data storage. Moreover, this fact applies to drives of both form factors.

Do you want to build a gaming or multimedia PC for working with graphics and video, do you plan to download new films and music albums to your hard drive in large quantities? Then it is better to choose a hard drive with a capacity of at least 1 TB for a desktop PC and at least 750 GB for a mobile one. But, of course, the final calculation of the hard drive capacity must meet the specific needs of the user, and in this case we provide only recommendations.

Separately, it is worth noting data storage systems (NAS) and multimedia players that have become popular. As a rule, large 3.5” drives are installed in such equipment, preferably with a capacity of at least 2 TB. After all, these devices are focused on storing large amounts of data, which means that the hard drives installed in them must be capacious with the lowest price for storing 1 GB of information.

Disk geometry, platter and recording density

When choosing a hard drive, you should not blindly focus only on its total capacity, according to the principle “the more, the better.” There are other important characteristics, including: recording density and the number of platters used. After all, not only the volume of the hard drive, but also the speed of writing/reading data directly depends on these factors.

Let's make a small digression and say a few words about the design features of modern hard drives. Data is recorded in them on aluminum or glass disks, called platters, which are coated with a ferromagnetic film. Reading heads located on special rotating positioner brackets, sometimes called “rocker arms,” are responsible for writing and reading data from one of thousands of concentric tracks located on the surface of the plates. This procedure occurs without direct (mechanical) contact between the disk and the head (they are located at a distance of about 7-10 nm from each other), which ensures protection against possible damage and long service life of the device. Each plate has two working surfaces and is served by two heads (one on each side).

To create address space, the surface of magnetic disks is divided into many circular areas called tracks. In turn, the tracks are divided into equal segments - sectors. Due to this ring structure, the geometry of the plates, or rather their diameter, affects the speed of reading and writing information.

Closer to the outer edge of the disk, the tracks have a larger radius (longer) and accommodate large quantity sectors, and therefore a larger amount of information that can be read by the device in one revolution. Therefore, on the outer tracks of the disk, the data transfer speed is higher, since the reading head in this area covers a greater distance in a certain time period than on the inner tracks, which are located closer to the center. Thus, disks with a diameter of 3.5 inches have higher performance than disks with a diameter of 2.5 inches.

A hard drive can contain several platters at once, each of which can store a certain maximum amount of data. In fact, this determines the recording density, measured in gigabits per square inch (Gbit/in2) or gigabytes per platter (GB). The larger this value, the more information is placed on one track of the platter, and the faster the recording is carried out, as well as the subsequent reading of information arrays (regardless of the speed of rotation of the disks).

The total volume of the hard drive is the sum of the capacities of each of the plates placed in it. For example, the first commercial drive with a capacity of 1000 GB (1TB), which appeared in 2007, had as many as 5 plates with a density of 200 GB each. But technological progress does not stand still, and in 2011, thanks to the improvement of perpendicular recording technology, Hitachi introduced the first 1 TB platter, which is widely used in modern large-capacity hard drives.

Reducing the number of platters in hard drives has a number of important advantages:

• Reduced data reading time;
• Reduced energy consumption and heat generation;
• Increased reliability and fault tolerance;
• Reducing weight and thickness;
• Cost reduction.

Today on the computer market there are simultaneously models of hard drives that use platters with different recording densities. This means that hard drives of the same volume can have completely different numbers of platters. If you are looking for the most effective solution, then it is better to choose a HDD with the least number of magnetic plates and a high recording density. But the problem is that in almost no computer store you will not find the values ​​of the above-described parameters in the descriptions of disk characteristics. Moreover, this information is often not available even on the official websites of manufacturers. As a result, for ordinary ordinary users, these characteristics are not always decisive when choosing a hard drive, due to their inaccessibility. However, before purchasing, we recommend that you definitely find out the values ​​of these parameters, which will allow you to select a hard drive with the most advanced and modern characteristics.

Spindle speed

The performance of a hard drive directly depends not only on the recording density, but also on the rotation speed of the magnetic disks located in it. All plates located inside the hard drive are rigidly attached to its internal axis, called the spindle, and rotate with it as a single unit. The faster the plate rotates, the sooner a sector will be found that should be read.

In stationary home computers, hard drive models are used that have an operating speed of 5400, 5900, 7200, or 10000 rpm. Units with a spindle speed of 5,400 rpm are typically quieter and generate less heat than their high-speed competitors. Hard drives with higher speeds, in turn, have better performance, but are also more energy-consuming.

For a typical office PC, a drive with a spindle speed of 5400 rpm will be sufficient. Also, such disks are well suited for installation in multimedia players or data storage, where an important role is played not so much by the speed of information transfer, but by reduced power consumption and heat dissipation.

In other cases, in the vast majority, disks with a platter rotation speed of 7200 rpm are used. This applies to both mid- and high-end computers. The use of HDDs with a rotation speed of 10,000 rpm is relatively rare, since such models of hard drives are very noisy and have a fairly high cost of storing one gigabyte of information. Moreover, recently, users increasingly prefer to use solid-state drives instead of high-performance magnetic disks.

In the mobile sector, where 2.5-inch drives reign, the most common spindle speed is 5400 rpm. This is not surprising, since low power consumption and low level heating parts. But we haven’t forgotten about the owners of productive laptops - there is a big choice models with a rotation speed of 7200 rpm and even several representatives of the VelociRaptor family with a rotation speed of 10000 rpm. Although the feasibility of using the latter even in the most powerful mobile PCs is highly questionable. In our opinion, if you need to install a very fast disk subsystem, it is better to pay attention to solid-state drives.

Connection interface

Almost all modern models of both small and large hard drives are connected to personal computer motherboards using the SATA (Serial ATA) interface. If you have a very old computer, then you can connect using the parallel PATA (IDE) interface. But keep in mind that the range of such hard drives in stores today is very scarce, since their production has almost completely ceased.

As for the SATA interface, there are 2 drive options on the market: connection via the SATA II or SATA III bus. In the first option, the maximum data transfer rate between the disk and RAM can be 300 MB/s (bus bandwidth up to 3 Gbit/s), and in the second - 600 MB/s (bus bandwidth up to 6 Gbit/s). It is also worth noting that the SATA III interface has slightly improved power management.

In practice, the bandwidth of the SATA II interface is enough for any classic hard drive. After all, even the most productive HDD models have a speed of reading data from the plates that barely exceeds 200 MB/s. Another thing is solid-state drives, where data is stored not on magnetic plates, but in flash memory, the reading speed from which is many times higher and can reach values ​​of over 500 MB/s.

It should be noted that all versions of the SATA interface maintain compatibility with each other at the level of exchange protocols, connectors and cables. That is, a hard drive with a SATA III interface can be easily connected to the motherboard via a SATA I connector, although the maximum disk throughput will be limited to the capabilities of the older revision and will be 150 MB/s.

Buffer memory (Cache)

Buffer memory is a fast intermediate memory (usually a standard type of RAM) that serves to level (smooth out) the difference between the speeds of reading, writing and transferring over the data interface during disk operation. The hard drive cache can be used to store the last data read, but not yet transferred for processing, or data that may be requested again.

In the previous section, we already noted the difference between hard drive performance and interface bandwidth. It is this fact that determines the need for transit storage in modern hard drives. Thus, while data is being written or read from magnetic plates, the system can use the information stored in the cache for its needs without having to wait.

The size of the clipboard on modern hard drives made in the 2.5” form factor can be 8, 16, 32 or 64 MB. The older 3.5-inch brothers have a maximum buffer memory of 128 MB. In the mobile sector, the most common disks are 8 and 16 MB cache. Among desktop hard drives, the most common buffer sizes are 32 and 64 MB.

Purely theoretically, cache bigger size, should provide disks with greater performance. But in practice this is not always the case. There are various disk operations in which the clipboard has virtually no effect on the performance of the hard drive. For example, this can happen when reading data sequentially from the surface of the plates or when working with large files. In addition, the efficiency of the cache is affected by algorithms that can prevent errors when working with the buffer. And here a disk with a smaller cache, but advanced algorithms for its operation, may turn out to be more productive than a competitor with a larger clipboard.

Thus, there is no point in chasing the maximum amount of buffer memory. Moreover, if you need to significantly overpay for a large cache capacity. In addition, manufacturers themselves try to equip their products with the most effective cache size, based on the class and characteristics of certain drive models.

Other characteristics

Finally, let's take a quick look at some of the remaining characteristics you might see in hard drive descriptions.

Reliability or mean time between failures ( MTBF) - the average duration of operation of a hard drive before its first failure or the need for repair. Usually measured in hours. This parameter is very important for disks used in server stations or file storages, as well as as part of RAID arrays. As a rule, specialized magnetic drives have an average operating time of 800,000 to 1,000,000 hours (for example, RED series drives from WD or Constellation series from Seagate).

Noise level - noise created by the elements of the hard drive during its operation. Measured in decibels (dB). It mainly consists of noise that occurs when positioning the heads (crackling) and noise from spindle rotation (rustling). As a rule, the lower the spindle speed, the quieter the hard drive operates. A hard drive can be called quiet if its noise level is below 26 dB.

Power consumption - important parameter for drives installed in mobile devices where big time autonomous work. The heat dissipation of a hard drive also directly depends on energy consumption, which is also important for portable PCs. As a rule, the level of energy consumption is indicated by the manufacturer on the disk cover, but you should not blindly trust these figures. Very often they are far from reality, so if you really want to find out the power consumption of a particular drive model, it is better to search the Internet for the results of independent tests.

Random access time - the average time it takes to position the disk read head over an arbitrary area of ​​the magnetic plate, measured in milliseconds. A very important parameter that affects the performance of the hard drive as a whole. The shorter the positioning time, the faster data will be written to or read from the disk. Can range from 2.5 ms (for some server drive models) to 14 ms. On average, for modern disks for personal computers this parameter ranges from 7 to 11 ms. Although there are also very fast models, for example, the WD Velociraptor with an average random access time of 3.6 ms.

Conclusion

In conclusion, I would like to say a few words about the increasingly popular hybrid magnetic drives (SSHD). Devices of this type combine a regular hard drive (HDD) and a small solid-state drive (SSD), which acts as additional cache memory. Thus, developers are trying to use together the main advantages of the two technologies - the large capacity of magnetic plates and the speed of flash memory. At the same time, the cost of hybrid drives is much lower than that of newfangled SSDs, and slightly higher than that of conventional HDDs.

Despite the promise of this technology, SSHD drives are currently very poorly represented on the hard drive market, with only a small number of models in the 2.5-inch form factor. Seagate is the most active in this segment, although competitors Western Digital (WD) and Toshiba have also already presented their hybrid solutions. All this leaves hope that the SSHD hard drive market will develop, and we will soon see new models of such devices on sale not only for mobile computers, but also for desktop PCs.

This concludes our review, where we examined all the main characteristics of computer hard drives. We hope that based on this material, you will be able to choose a hard drive for any purpose with the optimal parameters corresponding to them.

In my work, I often encounter the need to have several versions of text on the clipboard. I think I’m not the only one who would like to get more options and increase the efficiency of working with the clipboard, and therefore I want to tell you about one wonderful program, ClipDiary, the capabilities of which will pleasantly surprise you.

Let me remind you of the standard techniques for working with the Windows clipboard:

• Ctrl+C or Ctrl+Insert – copy the selected fragment to the clipboard
• Ctrl+X or Shift+Delete – cut, i.e. copy to clipboard and delete from text
• Ctrl+V or Shift+Insert – paste the last copied element

You can also use the right-click context menu:

I personally only use combinations with “Insert”, in my opinion it’s much more convenient, maybe not everyone knows about it. On some keyboards, the “C”, “V”, “X” buttons are already labeled so you don’t forget how to use them. But the standard method has a drawback, because you can paste only the last copied element, i.e. each new text overwrites the previous one.

Clipboard program

Download and install the ClipDiary program.

The program is free for home use. When you launch it for the first time, a wizard will appear, which will show you all the capabilities of the program and also help you configure it. In the main program window, you can open the current clipboard using the icon at the bottom of the screen.

The essence of the work is simple - everything that you copy to the clipboard using the “Ctrl+C” or “Ctrl+Insert” buttons is saved in the list and is called “clips”, even after restarting the computer. At any time, you can open the list and find previously copied text. I looked through several similar programs, but ClipDiary was the only one that can insert data from history using hot buttons. Other programs only opened the entire list, from which you could select something, and then manually paste it where needed.

Everything is automatic here. Press the assigned key combination one or more times until you find the copied text, and it is immediately pasted into the document. The only thing I'm missing is to be able to associate a hotkey with one specific phrase that I have to insert often. You have to press buttons many times until you get to what you need on the list.

It looks like this:

The list shows all the most recently copied items. I set up my hotkeys like this:

Accordingly, I can navigate through the history using the combinations “Ctrl+Shift+Insert” and “Ctrl+Shift+Home” until I see in a small pop-up window the text that I previously copied, for example the phrase “I personally only use”

And using the “Ctrl+Shift+End” buttons I can go to the clipboard, opening the main program window.

Watch this short video:

Using the hotkeys “Ctrl+I” you can clear the Windows clipboard without clearing the Clipdiary list. To clear it, you need to open the program window, select everything that is there and press the red cross or “Ctrl+Del”. If the list ends up on several pages, do this several times.

In the settings of the ClipDiary program in the “Advanced” section there are a bunch of subtle settings with which you can customize everything for yourself.

Clipboard history in Microsoft office

The Microsoft Office package programs Word, Excel, PowerPoint include the ability to work with an extended clipboard. To activate it you need to click on the barely noticeable button here:

and then you get into an additional window in which the clipboard is located. The last 20 copied elements are saved here, including screenshots.

You can only insert from there manually, and the list is cleared after closing the program. You can also clear the clipboard using the “Clear all” button. By the way, work with documents.

These are the pies 🙂 I hope you liked the idea, so share the article with your friends on social networks!

Effect of buffer on hard drive performance

Vladimir Leonov

Modern series of hard drives from all manufacturers can be divided into two categories, differing in the size of the internal buffer (2 or 8 MB). Viewing price lists showed that the difference in price for disks of the same volume with different sizes buffers in Moscow now range from 3 to 19 dollars and depend on the manufacturer and seller. In this article we will try to show the impact of the internal buffer size on hard drive performance.

We will compare performance using the example of HDS722516VLAT20 and HDS722516VLAT80 hard drives from the Deskstar 7K250 family from Hitachi. To be more precise, since last year, Hitachi has been producing hard drives in a new division, HGST (Hitachi Global Storage Technologies), formed by combining its own disk production and facilities acquired from IBM.

Both drives have a capacity of 160 GB and are completely identical in mechanical design. The tested drives had the same firmware version - V340A60A and differed only in the size of the internal buffer (2 and 8 MB, respectively).

We compared performance under the Windows XP Professional.SP1 operating system on a computer with the following configuration:

Motherboard MSI 875P Neo (MS-6758);

Processor Intel Pentium 4 3.06 GHz (533 FSB);

Memory 1 GB (2×512 MB Kingston PC2700 DDR SDRAM);

Hard drive Hitachi Deskstar IC35L090AVV207-0.

The tested drives were connected one by one as Secondary Master.

To compare performance, we took tests that simulate the operation of the disk subsystem in real conditions and differ in the way they evaluate performance:

Ziff Davis WinBench 99 v. 2.0;

Futuremark PCMark2004;

FileCopy Test v. 0.5.3 (developed by F-Center). In the Ziff Davis WinBench 99 v. 2.0 determines the performance of the disk subsystem when running real applications. This good test

As one would expect, the disks have the same access time (Table 1) and the graphs of the dependence of the reading speed on the location of the data on the disk are the same for both disks. In terms of performance in all subtests, the HDS722516VLAT80 hard drive is ahead, and we can say that this advantage is entirely determined by the performance of the buffer. As can be seen from table. 1, when using the FAT-32 file system, the buffer effect is usually more noticeable.

Futuremark's PCMark04 test suite is based on real-world applications and is designed to provide a detailed examination of computer performance. The package consists of several sections, one of which is designed to determine the performance of the disk subsystem. To test the disk subsystem, so-called traces are used - sequences of disk activity pre-recorded on a reference computer when performing various tasks.

FileCopy Test v. utility 0.5.3 was developed by specialists from the F-Center company and is intended to determine the performance of a hard drive when creating (writing) files on the disk, reading files from the disk and copying files from one part of the disk to another. The results show the operation time and speed measured in megabytes per second (MB/s). When creating files, pre-prepared patterns are used - lists containing information about the length and number of files that need to be created. The pattern can be created either manually or automatically for any folder using the Scan option, which makes it easy to create a pattern with a real distribution of files by size.

We used the patterns included in the program distribution package. By the name of the patterns it is easy to guess their content. The test results are shown in table.

3. The table shows that the degree of influence of the buffer size on the performance of the hard disk depends on the operation being performed and the average size of the processed file. Thus, when performing separate write and read operations on large files (ISO pattern), the buffer size has almost no effect on performance, but when copying such files, the effect of the buffer size is most pronounced.