USB-HDD, USB-ZIP, USB-FDD boot

 

USB-HDD, USB-ZIP, USB-FDD boot

HDD, short for harddiskdrive, is the English name of the hard drive. The most basic computer memory, we often say that disk C, disk D and other disks are hard drive, but we generally referred to as hard drive. Modern hard disk capacity is generally 40g, 80g, 120g, 160g and so on, currently the highest desktop level hard disk is 500g. Hard disks can be divided into 3.5-inch, 2.5-inch, and 1.8-inch by volume. They can be divided into PATA, SATA, and SCSI by interface. PATA and SATA are generally table-level applications with large capacity, the prices are relatively low and suitable for household use. scsi is generally used for high-end applications such as servers and workstations. Its capacity is relatively small, its price is relatively high, its single performance is good, and its stability is also relatively high. Zip Zip refers to a high storage density disk drive and disk. The size of a zip disk is about 100 MB, which is similar to that of a traditional 3.5 "disk. In addition, a 3.5 MB high-capacity disk of LS-120 specifications, and its disk drive can read the traditional "disk, but its access speed is slightly inferior to zip. FDD interface: This is a built-in soft drive interface. It is a traditional soft drive interface that is directly connected to the soft drive interface on the computer motherboard at a low price. A floppy disk is a floppy disk. It is a device that reads 3.5 inch or 5.25 inch floppy disks. Currently, the most commonly used is a 3.25 inch floppy disk, which can read and write 3.5 inch MB of 5.25 inch floppy disks. of floppy disks have been eliminated and will rarely be seen. Soft drive is divided into two types: internal and external. The built-in drive uses a dedicated FDD interface, while the external drive is generally used for laptops and USB interfaces. With the development of the computer, these disadvantages gradually become obvious: the capacity is too small, the read/write speed is slow, the life and reliability of the floppy disk are poor, and the data is easy to lose, therefore, there is a tendency to replace the software drive with other devices. However, as a computer's standard device, the software drive can be used in a variety of operating systems without the need to install additional drivers. At the same time, the price is low, so in many cases, the software drive has its unique convenience, therefore, software drives are still common on computers. **************************************** **************** Flash Disk and USB flash disk are just two names, no difference. USB boot now mainly includes USP-FDD, USB-zip, USB-HDD and USB-CDROM. To use a USB mobile hard disk as the boot disk, you must set the system boot sequence in CMOS to USB-HDD. USB-Zip is a large-capacity floppy disk drive launched by Iomega. It has already been discontinued and not many people are using it because the failure rate of the floppy disk is still high. USB-HDD, is the USB mobile hard disk. USB flash drives are divided into USB 1.1 and USB 2.0. If your computer has the USB interface, you can insert a USB flash drive to the interface and try to copy a large file to the USB flash drive, for example, a 40 MB file, it takes about 5-6 seconds for USB2.0, and at least one minute for USB1.1. If your motherboard does not support USB, you will be prompted when you insert a USB flash drive, which will prompt "high-speed devices have inserted low-speed interfaces, which will affect the speed. **************************************** **************** About BIOS first startup. Reward score: 25-solution time: 2006-3-23 I hope you can tell me which one is (Hard Disk boot) For everyone's understanding: Below is a lot of content. Please tell me which hard drive is started. I usually use hard drive to start in no optical zone! If that man can explain all the following things and let me know their purposes and functions, then they are even more powerful. ''looking forward ...... Floppy ls120 HDD-0 scsl cdrom HDD-1 HDD-2 HDD-3 zip100 USB-FDD USB-ZIP lan d: USB-HDD. (HDD-0, HDD-1, that is, BIOS can set the priority boot sequence for two hard disks. Ide1 is connected to two hard disks. The primary disk is 0, and the slave disk is 1. ide2 is similar. BiOS set HDD-0, the master disk starts. And vice versa. Ide1 and ide2 are connected to one hard disk, ide1 is 0, and ide2 is 1. BiOS set HDD-0, ide1 on the main disk boot. The same is true .) Floppy indicates a soft drive CDROM Optical Drive Ls120 refers to a super disk floppy disk. Zip100 (100 MB zip built-in soft drive. Zip floppy drive is the trump card of Iomega Corporation, a global leader in personal mobile storage solutions, and is favored by world-renowned computer manufacturers. The storage capacity of the 100 MB zip disk is equivalent to 70 traditional 1.4 MB Floppy disks, and the transmission rate is as high as Mb/s. The average seeking time is only 29 milliseconds, which is 20 times higher than that of the traditional floppy disk, this makes it possible to play audio and video files on a soft drive. The quality of the zip floppy disk is stable and has a five-year replacement commitment. This not only frees people from the headache of bad disk data loss, but also, most importantly, the unique password protection feature of emega allows individual users to conveniently pass and carry a large amount of information through a zip floppy disk .) Lan refers to LAN technology (enable Nic ). USB-FDD, USB-ZIP, USB-HDD refers to several boot modes of the flash drive (currently most of the flash drive with boot function. There are several USB boot methods, such as USB-FDD, USB-HDD, USB-ZIP and so on. In addition to the longco Dual Boot type (odh), other models, including other brands of flash memory, are only USB-HDD, USB-ZIP mode boot function, without USB-FDD mode. This USB-FDD Boot Mode seems to be simulating the 1.44m soft drive mode, as if there is no important, in fact, the key technology is here. Why? Because many laptops, including elite mobile PCs, Toshiba models, and even IBM's latest R30 series laptops, support only USB-FDD-based boot, apart from longco's Dual Boot, other flash drives do not support these laptops. I recently bought an IBM ThinkPad R31 laptop. Because of the need for floppy boot to fix WINXP that comes with it and does not have a soft drive, all dual-boot USB drives will work in handy. So currently, apart from the longco Dual Boot Model, other flash drives cannot be replaced .) SCSL refers to the SCSI bus and hard disk. (SCSI is the interface standard between computers and peripherals defined by the US ansi9.2 committee. The system uses a SCSI hard disk because the 5csi interface has more advantages than the common ide interface: (1) SCSI provides a high-speed transmission channel with faster transmission speed; (2) the SCSI interface uses bus master data transmission, which consumes less CPU resources. (3) it can be connected to multiple devices of different types simultaneously. (4) the SCSI hard disk uses a linear concept when identifying the hard drive sector, that is, the hard drive only has 1st and 2nd sectors in sequence... Sector N, unlike the IDE Hard drive's "cylindrical/head/sector" 3D format. This linear orchestration method has the minimum access latency, which can accelerate the hard disk access rate, especially in the case of sustained large-capacity data storage control, the advantage is more obvious .)