USB stick as System disk installation system, the start booting from USB device and boot failed solution appears

Recently installed in the old machine on the CentOS system, with the Chinese cabbage or ultraiso after making the system disk, the start booting from USB device and boot failed, has been very depressed , thought to be the cause of the system. It's not working on the Internet to say that the Syslinux file is modified or replaced. The final discovery is the format of the U-boot, which does not match the format of the BIOS boot USB drive.

Bois Boot USB has several forms: Usb-hdd,usb-fdd,usb-zip,usb-cdrom

1. Zip mode refers to the USB flash drive simulation into a ZIP driver mode, the drive after the start of the disk is mostly a:2. HDD mode refers to the drive mode of the USB flash drive. Special NOTE: If HDD mode is selected, then the drive letter after startup of this startup disk is C: It is easy to create a lot of problems when operating the boot partition. For example, when installing the system, the installer will write the boot file to the USB flash drive instead of the boot partition of your hard drive! Cause system installation to fail. So please try to select the zip mode first. 

3. FDD mode refers to the USB drive model to simulate the floppy drive mode, the drive after startup disk is a:, this mode of the USB flash drive in some support USB-FDD startup will not find a USB flash drive, so please use as appropriate. 4.usb-cdrom disc emulation mode, DOS boot can not account for the disk, compatibility is high, new and old motherboards are generally available. Advantages can be used like a disc (for example, for Windows System installation). Shortcomings, the volume of the U disk production into this mode, we will lose the memory of this part of the disk space write rights, the remaining space will be recognized as a separate U disk, can be removable disk, of course, can also be made of fixed disk, further zoning. Production generally need specific U disk model/lot number corresponding to the production tools to make, for the U disk Online has the corresponding production tools.

then the problem came, at first I do a USB flash drive disk when, with the USB-HDD, but in the old machine bois inside but there is no usb-hdd, so has been unable to start. Appear title The problem, later replaced by Usb-zip form to make a U disk boot disk, Bois adjust to usb-zip format, you can.

USB stick as System disk installation system, the start booting from USB device and boot failed solution appears