Clear out the flash drive boot function

How much do you know about the startup function of the flash disk? Although the USB flash drive boot function implementation is very simple in the production of a bootable flash drive after the motherboard BIOS can be set. However, because the USB storage device is not a long time, the existing motherboard will simulate it as other storage devices to start, for example, now many new motherboards support USB boot devices are: USB_HDD, USB_FDD, Usb_zip Usb_cdrom and other categories. There is no essential difference between these different priming modes, but there are still some small differences.
Start with USB_FDD, and a when startup completes: letter, and the capacity of only 1.44M, and the use of USB_HDD to boot, after the boot system appears after the letter is C:, the original hard disk C is turned into D disk, the rest of the letter after the push, you can use the full capacity of the flash disk. The difference between usb_zip and USB_HDD boot mode is that Usb_zip will have a virtual hard disk after the logical hard drive, with some of the common DOS commands, and USB-HDD will not load these commands. Most USB flash drives now support only one startup mode, but some brand-name products support two different startup modes. www 3lian com
Space utilization of start-up
Also note that some of the boot-enabled USB flash memory is separate from the boot and usage areas, and the user cannot use the Hingi and the area's capacity at the same time, which in some cases is wasteful. And some products in the boot zone and the use of the area is combined, users can fully use the full capacity, without worrying about waste.
In fact, any flash drive will start itself.
In fact, to use the USB flash disk to boot the system is the key to the motherboard to support the launch of USB devices, do not believe that the so-called "real self-boot" function, any flash disk after a certain means of production, can become a startup disk.
Another caveat is that even if your motherboard does not support the flash drive, there is a solution, that is, upgrade the motherboard BIOS, of course, the new version of the BIOS program to support the flash drive to start the line. Generally large motherboard manufacturers in this respect do a better job, if the motherboard can not find the appropriate BIOS upgrade program, you can only give up the USB flash drive startup function.