Portable media based on solid-state memory chips have become so common that imperceptibly almost supplanted the usual CDs.It is difficult to surprise anyone recently purchased a motherboard that accompany the drivers for which are supplied by the manufacturer on a flash drive small volume.
analyze the development of media, it can be concluded that in a short time on the disk completely forgotten in favor of alternative USB-devices.In light of the foregoing, it is clear that if a modern computer for some reason, the BIOS does not see the stick, then it is equivalent to a small local disaster.
difference in connections
owner of a personal computer, which is at least in general terms, familiarize with the specification of your motherboard, probably wondering why in its computer system outputs a universal serial USB bus only a few pieces, but in the instruction of theirIt mentioned at least a dozen.
Actually no deception here.In the production it is soldered to the motherboard only a limited set of outputs USB, as all others made in the form of two rows of thin copper pins on the main board.They are not hard to find, since there are certainly a number corresponding to the signature-designation (USB 3-4, and so on. D.).These plugs special plug, which is a trail leads to the classic USB-connectors.Such solution is convenient in that the strip with the outputs can be placed not only on the rear side of the system unit, which is often very difficult to reach, but also on the front panel and the side and top of the housing.If the BIOS does not see the USB flash drive, you first need to determine which port is connected to the drive.
External USB-port: blessing or headache
developers, creating a modular system outputs, pursued a remarkable goal - to provide the flexibility and convenience to the user.However, the laws of physics has not been canceled, because of what is sometimes a problem with the BIOS, which does not want to see a flash drive connected to the computer.
Indeed, the direct soldering to the connector contacts on the board - this one, but the use of additional conductors with its own long and resistance - completely different.
Is it any wonder that one day, by connecting USB-drive to the remote bracket assembly, the user will wonder why there is no stick in the BIOS?Thus, when such problems of the first thing to do owner - is to insert the USB-drive in any of the ports located at the rear of the system unit, ie. E. It is one that is physically soldered to the board.Normally, this simple action is enough to solve this problem.Admittedly, Remote strap is still not so bad.It is important to use them to apply a quality trail, and it is shorter than - the better.
than to feed USB-drives
As electronic devices, all stick to their jobs require electricity.The same is true for all internal and peripheral computer components.Hence the conclusion - if the parameters are supplied with voltage or current differs from the nominal, the failure to appear in the work, to the extent that errors may occur BIOS.The power supply to all components of the system unit "in charge of" special unit, located within the housing.
Specifically drives on USB, the control circuit and power distribution at ports "tied" to the controllers.Each of these elements can pass through itself limited electric power.Thus, if the two ports served by a single controller, the device is connected to the high current consumption (external HDD or DVD) and flash drive, the latter can operate completely unpredictable.This can be a lot to talk about.If we dispense with the theory, and immediately answer the question of why the BIOS does not see the stick, then it will be quite simple: if the drive is included in the port, and all nearby are busy, to check the need to remove extraneous device, leaving only oneUSB-drive.
alternative solution
If you can not eliminate the use of all USB-equipment (needed printer, mouse, scanner, keyboard, etc.), you should think about buying a special device - an external USB-hub with its own power supply.This unique tee in terms of power not dependent on the computer.
Extension
Some owners of a computer system to connect external USB-drives are used in between the wire.It is a thin cable with one hand, which has a slot "mother" in which to insert the stick and so on., And on the other - the usual plug for connector port.Reasons why use such a power strip, can be very different.Sometimes, without such a solution is impossible to do.What is more important, if the BIOS does not see the stick, and it joins the system unit is an extension cord, then from its use should be discarded.At least during the test.
incompatible standards
Now there is a gradual replacement of USB-2.0 to 3.0.The fact that it is inevitable, no doubt: the modern users are unlikely to survive due to the disappearance from the market of mass device solutions based on USB 1.0.-1.1.The problem of transition is that when you try to connect the device to the port of version 2.0 of the standard 3.0, there is no guarantee the correct operation.
Theoretically standards are compatible, but in some rare cases, the boards with ports the latest version of the BIOS does not see the stick of the previous generation.To restore functionality to the operating system should install drivers for support.You can also try a BIOS update.This will have to visit the website of the developer of the motherboard, download the appropriate software package and reflash.Or even simpler: I do not understand why the BIOS does not see the USB flash drive and remove it from the port USB 3.0 (usually highlighted) and connect to the socket 2.0.
Errors base system
work any motherboard made with the direct participation of a special set of programs - BIOS.That he configures all ports, assigns them to interrupt, sets the DMA channel, and so forth. It is no wonder that the BIOS if an error occurs, the USB flash drive can not operate.In this case, you must update the said software package.
To solve this problem, you can use in several ways: to download from the site of the board file a new version of the BIOS and "sew" in its non-volatile memory motherboard with a special program.
also updated through the Internet by selecting the appropriate item in the flasher.BIOS update to XP in the same way as in other operating systems of "Microsoft".And just before performing flashing need to disable antivirus.We recommend you carefully read the instructions in firmware, as well as get acquainted with all the warnings issued by the updater.This tool should be the last resort to what is, if the BIOS does not see the bootable USB flash drive.
Invalid record
increasing number of people are beginning to work with the stick as well as CDs.With such media download, install the operating system, even the BIOS update.It is not enough simply to copy a batch of files for a similar USB-drive.To be able to boot from it, you need a special way to prepare it.
For this purpose, a number of programs.For example, it may be Ultra ISO, WinSetupFromUSB, RuFus and others.If the BIOS does not see the bootable USB flash drive, it is likely that the actual recording boot area has been performed correctly.In this case, for the preparation of USB-drive, use another application.Often it helps.
device health
And, finally, we can not ignore the fact that the flash drive itself could be damaged.Sometimes it can work as a simple media, but to boot from it is impossible.In other cases, the recorded data is unexpectedly deleted - it often "sin" Chinese counterfeits with the corrected volume.
Thus, if none of the above does not work, then you need to check the device to another computer system.It may also help to re-formatting, file system (between NTFS and FAT32), edit the cluster size.It is also helpful to read the instructions to the board, which describes the configuration modes of USB-ports.Perhaps the solution to the problem in a single paragraph setting BIOS.
