How to make the antivirus U disk

How to make the antivirus U disk

Start with a U disk involves a variety of startup mode, you know the differences between the various modes, the following for you to say this knowledge:

Various USB boot modes:

1, USB-HDD: (occupy 1 sectors) hard disk simulation mode, DOS boot after the show C: disk, hp (HP) u disk Format tool made by the U disk is the starting mode. This mode is highly compatible, but cannot be started for some computers that only support Usb-zip mode.

This MBR is read first after the computer starts, it is then started from the specified active primary partition (so the partition you want to start must be activated and the specified boot file exists), read into the PBR boot sector, and then boot to the boot sector, starting the system or PE or GRLDR ....

The common boot process is: mbr→ partition pbr→ boot files (such as: XP Ntldr,vista bootmgr, Grub GRLDR. )

2, Usb-hdd+: (occupy 1 sectors) Enhanced USB-HDD mode, DOS boot after the display of C: Disk, compatibility is very high. The disadvantage is that computers that support only usb-zip cannot be started.

The computer starts reading the MBR first, then starts from the specified active primary partition, reads into the PBR boot sector, and then the boot file specified by the boot sector, starting the system or PE or GRLDR ....

The boot process is: mbr→ partition pbr→ boot file

3, Usb-zip: Large-capacity floppy disk simulation mode, DOS boot after the display of a disk, Flashboot made the usb-zip to start the U disk is to use this mode. This mode is the only optional mode on some older computers, but it is not compatible with most new PCs, especially the large capacity U disk.

The boot process is: partition pbr→ boot files

4, usb-zip+:: (occupy 1 sectors) Enhanced Usb-zip mode, support Usb-hdd/usb-zip dual-mode boot (depending on the computer, some BIOS may display after DOS boot c: disk, some bios in the DOS boot may show a: disk), So as to achieve high compatibility. The disadvantage is that some support USB-HDD computer will be this mode of the U disk is usb-zip to start, resulting in more than 4GB of large capacity U disk compatibility has been reduced.

The boot process is: mbr→ partition pbr→ boot file

5. USB-FDD: Refers to the U disk to simulate the floppy drive mode, after the launch of U disk Letter is a:,

The boot process is: partition pbr→ boot files

6, Usb-cdrom: CD simulation mode, DOS boot can not occupy the letter, compatibility is high, the new and old motherboard can be generally. Advantages can be used like a CD-ROM (for example, for a Windows system installation). Disadvantages, the volume of U disk production into this mode, we will lose this part of U disk space to write right, the remaining space will be recognized as a stand-alone U disk, can be removable disk, of course, can also be made into a fixed disk, further zoning. When making the general need for specific U disk model/batch number of the corresponding production tools to make, for U disk Online has the corresponding mass production tools.