How to choose mobile hard disk
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Users questions: How to choose mobile hard disk, I would like to use mobile hard disk box assembly convenient for you? 40G about how much?
Experts answer: 1, speed: at the approach of copying the data before work, slow and even slower one minute one second will cause our hearts restless, so crucial to high-speed read and write data. In addition, when we use Mobile hard disk connected to a laptop, if the transmission speed is too slow, but also speed up the laptop to shorten battery life. Currently the mainstream 2.5-inch mobile hard disk read speed brand is about 15-25MB * s, write speed is about 8-15MB * s. If we are to 10MB * s of Copy of a write speed of DVD movies to mobile 4GB hard drive, then be time-consuming about 6 minutes and 40 seconds; If the read speed of 20MB * s mobile hard disk copy from the DVD movie to a 4GB hard drive, then the host computer it takes time about 3 minutes and 20 seconds. Usually 2.5 inches Brand mobile hard disk read and write speed from the hard drive, read and write control chip, USB port type are three key factors. 2.5-inch notebook hard drive under the speed of 4,200 rpm and 5,400 rpm is divided into two types, in addition to speed up disk access speed, a lot of hard drive manufacturers disk read-write cache Increased from 2MB to 8MB. Currently on the market the more common 2.5-inch brand Hitachi, Seagate, Western Digital and Samsung, the speed difference between them is relatively not too obvious, buy the brand in the mobile hard disk drive models do not have too much on the inside care about. Relative to the notebook Hard drive itself, read and write control chip and USB port type is determined by the highest brand mobile hard disk read and write speed. Example is also a USB2.0 interface, mobile hard drives, even the same type of 2.5-inch Hitachi 5400RPM hard drive, a 28MB * S can provide the Read speed, while the other can only provide the read speed of 15MB * S, that is because the main chip used by the two other components caused by the difference. But as consumers, it is difficult to figure out a move certain what type of hard drive used to read and write control chip, from the outside is also very difficult area Points are for real high-speed USB2.0 ports. Therefore, if we want to find out the brand mobile hard disk to a section to read and write how quickly, we should go IT website link of the product evaluation , or bring laptop computers when they buy real machine a try. Tip: To find out A brand of a mobile hard disk read and write speed, the best way to see which sites to professional IT product evaluation, or taking a laptop on-site trial. Second, the power: there are many low-grade desktop motherboard chassis front USB ports vulnerable to power shortages, this will result in mobile hard disk Can not be found in the normal Windows system failure. In the absence of sufficient power to move the hard drive will need to conduct an independent power supply, so most of the mobile hard drives are designed DC-IN DC jack to solve this problem. For notebook computers, the 2.5-inch USB HDD work , Hard drives and data interface powered by the USB Interface. USB interface provides 0.5A current, while notebook computer hard drives working current of 0.7 ~ 1A, the data copies usually no problem. However, if the larger capacity hard disk or move files easily occur when large enough power supply, but if the USB Interface to multiple USB devices at the same time, also prone to power supply shortage, resulting in data loss or hard drive damage. To strengthen the power supply, 2.5-inch USB HDD will normally provide from PS * 2 interface, usb interface, or to take power cord. So when moving large files need to Connected to the PS * 2 power supply line to take. (3.5-inch mobile hard disk usually comes with an external power supply, so basically there is no supply problem. IEEE1394 Interface provides 1.5A maximum current, so no need for external power supply) Note: power supply problems, under normal circumstances, a usb interface, for Power is sufficient. However, there may be encountered that need simultaneous access by two interfaces of the situation, but we find new Centrino notebook has canceled ps * 2 interface, so we must pay attention to it provides two interfaces to you what is so Touzi failure. Third, the quality: there are many so-called goods market Brand mobile hard disk actually assembled by the dealers themselves, that is, vendors provide only HDD Enclosure Dealers, distributors get the box and then loaded into the hard drive. The quality of this brand mobile hard disk can not be guaranteed, and parallel and even repair the hard disk drive is likely to be profiteers put into the mobile hard disk
Experts answer: 1, speed: at the approach of copying the data before work, slow and even slower one minute one second will cause our hearts restless, so crucial to high-speed read and write data. In addition, when we use Mobile hard disk connected to a laptop, if the transmission speed is too slow, but also speed up the laptop to shorten battery life. Currently the mainstream 2.5-inch mobile hard disk read speed brand is about 15-25MB * s, write speed is about 8-15MB * s. If we are to 10MB * s of Copy of a write speed of DVD movies to mobile 4GB hard drive, then be time-consuming about 6 minutes and 40 seconds; If the read speed of 20MB * s mobile hard disk copy from the DVD movie to a 4GB hard drive, then the host computer it takes time about 3 minutes and 20 seconds. Usually 2.5 inches Brand mobile hard disk read and write speed from the hard drive, read and write control chip, USB port type are three key factors. 2.5-inch notebook hard drive under the speed of 4,200 rpm and 5,400 rpm is divided into two types, in addition to speed up disk access speed, a lot of hard drive manufacturers disk read-write cache Increased from 2MB to 8MB. Currently on the market the more common 2.5-inch brand Hitachi, Seagate, Western Digital and Samsung, the speed difference between them is relatively not too obvious, buy the brand in the mobile hard disk drive models do not have too much on the inside care about. Relative to the notebook Hard drive itself, read and write control chip and USB port type is determined by the highest brand mobile hard disk read and write speed. Example is also a USB2.0 interface, mobile hard drives, even the same type of 2.5-inch Hitachi 5400RPM hard drive, a 28MB * S can provide the Read speed, while the other can only provide the read speed of 15MB * S, that is because the main chip used by the two other components caused by the difference. But as consumers, it is difficult to figure out a move certain what type of hard drive used to read and write control chip, from the outside is also very difficult area Points are for real high-speed USB2.0 ports. Therefore, if we want to find out the brand mobile hard disk to a section to read and write how quickly, we should go IT website link of the product evaluation , or bring laptop computers when they buy real machine a try. Tip: To find out A brand of a mobile hard disk read and write speed, the best way to see which sites to professional IT product evaluation, or taking a laptop on-site trial. Second, the power: there are many low-grade desktop motherboard chassis front USB ports vulnerable to power shortages, this will result in mobile hard disk Can not be found in the normal Windows system failure. In the absence of sufficient power to move the hard drive will need to conduct an independent power supply, so most of the mobile hard drives are designed DC-IN DC jack to solve this problem. For notebook computers, the 2.5-inch USB HDD work , Hard drives and data interface powered by the USB Interface. USB interface provides 0.5A current, while notebook computer hard drives working current of 0.7 ~ 1A, the data copies usually no problem. However, if the larger capacity hard disk or move files easily occur when large enough power supply, but if the USB Interface to multiple USB devices at the same time, also prone to power supply shortage, resulting in data loss or hard drive damage. To strengthen the power supply, 2.5-inch USB HDD will normally provide from PS * 2 interface, usb interface, or to take power cord. So when moving large files need to Connected to the PS * 2 power supply line to take. (3.5-inch mobile hard disk usually comes with an external power supply, so basically there is no supply problem. IEEE1394 Interface provides 1.5A maximum current, so no need for external power supply) Note: power supply problems, under normal circumstances, a usb interface, for Power is sufficient. However, there may be encountered that need simultaneous access by two interfaces of the situation, but we find new Centrino notebook has canceled ps * 2 interface, so we must pay attention to it provides two interfaces to you what is so Touzi failure. Third, the quality: there are many so-called goods market Brand mobile hard disk actually assembled by the dealers themselves, that is, vendors provide only HDD Enclosure Dealers, distributors get the box and then loaded into the hard drive. The quality of this brand mobile hard disk can not be guaranteed, and parallel and even repair the hard disk drive is likely to be profiteers put into the mobile hard disk
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