Mobile hard disk is a small and portable hard disk memory that can be plugged in or unplugged at any time. It is a storage product for exchanging large-capacity data between computers and emphasizing portability. Mobile hard disks mainly use USB or IEEE1394 interfaces. Advantages of mobile hard disk: large capacity; good compatibility, plug and play; fast speed; small size and quality; safe and reliable.
The operating environment of this tutorial: Windows 7 system, Dell G3 computer.
Introduction to mobile hard disk
Mobile hard disk is a small and portable hard disk memory that can be plugged in or out at any time; it is used to exchange large-capacity data between computers, emphasizing Portable storage products.
Advantages of mobile hard disk: large capacity; good compatibility, plug and play; fast speed; small size and quality; safe and reliable.
The vast majority of mobile hard drives on the market are based on standard hard drives, while only a few are based on micro hard drives (1.8-inch hard drives, etc.), but The price factor determines whether mainstream mobile hard drives are based on standard notebook hard drives.
Because the hard disk is used as the storage medium, the data reading and writing mode of the mobile hard disk is the same as that of the standard IDE hard disk. Mobile hard disks mostly use faster transmission interfaces such as USB and IEEE1394, which can transmit data to the system at a higher speed. As of 2009, the read speed of mainstream 2.5-inch brand mobile hard drives is about 15-25MB/s, and the write speed is about 8-15MB/s.
Mainstream manufacturers
Western Digital, Lijie, Lenovo, Patriot, MSI, Newman, Rambo, BenQ, Lvzhixing, Toshiba, Samsung, Hui Ju, Maxtor, Hitachi, Mobilestar, Seagate, Yijie, BUSlink, ithink, etc.
Things to note when using mobile hard disks
(1) Connection of mobile hard disk: The USB connection cable of mobile hard disk is both a data transmission line and a hard disk working power supply line. If the connection is too long, it will lead to increased resistance and data interference, making the mobile hard disk unable to work normally. Therefore, please note: the shorter the USB adapter cable, the better. In addition to the originally configured connection cable, it is not suitable to connect an extension cable; the second is to connect it to the computer For connection, you should choose the USB interface on the back of the chassis (the interface directly fixed on the motherboard), rather than the interface on the front of the chassis (they are connected to the front panel by the motherboard through a lead).
(2) External power supply of the mobile hard disk: When the mobile hard disk is working, the power supply for the hard disk and data interface is provided by the USB interface of the computer. However, when using a mobile hard drive of 10GB or more, relying solely on the USB cable to power the hard drive may cause abnormal operation due to insufficient power. In this case, an external auxiliary power supply (DC regulated power supply) must be used.
(3) Although the mobile hard disk uses a USB interface and can support hot swapping, please note that during use (Windows Me/2000/XP system) you must ensure that the USB interface is turned off before unplugging the USB cable. (Click the USB interface logo next to the date to close the interface), otherwise a sudden power outage of the high-speed hard disk may cause damage to the hard disk!
For more related articles, please visitPHP中文net! !
The above is the detailed content of What is a mobile hard drive. For more information, please follow other related articles on the PHP Chinese website!