4 Answers Sorted by: 19 First of all, USB means Universal Serial Bus. It is a standard for a control and data bus, just like PCIe, PCI, EISA and ISA are all buses. USB is not a device, like a CD or DVD drive. (Optical drives typically use SATA or IDE buses with the ATA protocol.) Then, there is the actual bootloader itself, i.e. the first bit of code that executes when a computer boots from USB. Unfortunately, HDD/USB and ISO bootloaders are very different beasts, and the BIOS or UEFI firmware also treat USB and optical media very differently during boot. USB-FDD "Unsupported" In summary: Generally speaking, if your system BIOS supports the USB-HDD boot option, it should boot Linux from a large capacity USB flash drive. (a BIOS that supports USB-HDD automatically detects the geometry of the USB Flash drive) In Boot Menu, there are options : Hard Drive, CD Rom, Floopy, Usb fdd, Usb Zip, Legacy Lan. But in the hard drive sections, there is something and there is a option : Other Drive(something like thay written there) You would need to get the flash drive formmatted as a floppy again (FDD) or try selecting that option in the BIOS. Note that most current computers don't use the "USB ###" type options (FDD, HDD, ZIP, etc.). Instead, they recongize the flash drive as a hard drive device. 6W8JU. What is the difference between USB CD and USB FDD? Only the option that includes the word “USB” is a USB option. FDD is a floppy disc drive, CD ROM is a CD drive, and HDD is a hard drive. How do I boot from USB FDD? Go into the BIOS, and go to the page that determines the boot order. In Boot Menu, there are options : Hard Drive, CD Rom, Floopy, Usb fdd, Usb Zip, Legacy Lan. But in the hard drive sections, there is something and there is a option : Other Drive(something like thay written there) USB-FDD stands for "floppy disk drive" which never works with USB flash drives, so in this case you should choose USB-HDD instead. Even though a USB flash drive is not a hard disk drive choosing this option frequently works. A zip drive is a removable floppy disk storage system that is mostly obsolete like floppy disk drives, so you shouldn't 4 Answers Sorted by: 19 First of all, USB means Universal Serial Bus. It is a standard for a control and data bus, just like PCIe, PCI, EISA and ISA are all buses. USB is not a device, like a CD or DVD drive. (Optical drives typically use SATA or IDE buses with the ATA protocol.) Then, there is the actual bootloader itself, i.e. the first bit of code that executes when a computer boots from USB. Unfortunately, HDD/USB and ISO bootloaders are very different beasts, and the BIOS or UEFI firmware also treat USB and optical media very differently during boot. USB-FDD "Unsupported" In summary: Generally speaking, if your system BIOS supports the USB-HDD boot option, it should boot Linux from a large capacity USB flash drive. (a BIOS that supports USB-HDD automatically detects the geometry of the USB Flash drive)

usb cd vs usb fdd