HDD Enclosure

With the rapid development of Internet and multimedia, people are more and more often encountered by GB unit for the volume of data exchange, in the face of such big data, hard disk is easily the best the carrier, however hard drive is installed in ordinary chassis, and install the operating system, so don't easy to move. Hard disk box the function of the one is a hard disk to play a physical protection, at the same time use facilitate mobile connections, make mobile hard drives.

Hard drive in protected drive needs to be of a strong degree, and seismic and prevent slippery effect, the volume is not too big. Hard disk box also need to facilitate and computer connection with the way, therefore external drive box of basic use USB interface, compared with built-in hard drive box of relatively rare. Because of the type of hard disk is therefore hard disk box also has a lot of the corresponding types, such as the use of desktop hard drive hard disk box usually need additional power, and use the notebook hard drive hard disk box usually don't need, etc.

According to the interface points

At present the mainstream move hard disk interface box there are five main parallel port, USB2.0, IEEE1394: (also is an apple of the interface, FireWire), ESATA and USB3.0. Parallel interface (print mouth) hard drive box is the hard drive of first appeared box, according to its different patterns of, and can be divided into ECP, EPP, SPP 3 kinds, among them, the EPP, ECP for high speed mode, but no matter which kind of pattern, its data transfer rate is lower. In addition, due to parallel with power, so the not parallel port connection box need to be independent of the hard drive switching power supply. Parallel also does not have the ability to plug and play. Now although parallel interface move hard disk box cheaper price, but based on the above reason, at present this kind of move hard disk interface box has already become more and more washed out.

USB interface move hard disk is the mainstream of products, the biggest advantage is easy to use, support hot swaps and plug and play, the Windows Me / 2000 / XP do not need to install the driver can work normally. According to the different standards, USB interface is divided into 1.1, 2.0 and 3.0 standard, is the biggest difference between them transfer rate of the different USB1.1 interface, the transmission speed USB2.0 interface only 12 Mbps, transmission speeds of up to 480 Mbps, and USB3.0 interface transmission speed up as high as five Gbps. Of course the usb interface the velocity value is proposed, in fact is not only can reach, and real data transmission in the transmission speed, but also by other aspects of the computer control. At the same time as the USB standard decentralization, so has usb2.0 interface on the main board of the mainstream of the USB interface of the can down 1.1 standards, but 3.0 support only the latest standard of the motherboard to provide, of course, the interface also support down 1.1 and 2.0 standard, but such motherboard price will some expensive. Although the price is higher than standard hard drive USB3.0 box of 2.0 standard to your 50 yuan, but its performance improvement is a qualitative (when large data transmission, 2.0 standard interface that long waiting just really upset), so please try to purchase USB3.0 interface move hard disk, even if your main board box, also can not support for future leaves room for the upgrade.

IEEE1394 commonly known as "the", the interface of the data transfer rate in theory can be up to 400 Mbps. But because IEEE1394 interface is not popular, equipped with a piece of the price does not poor need special IEEE1394 interface card can work, so the price is higher and the computer not to general, between popularity.

And ESATA interface hard drive, but generally used for box 3.5 inch hard disk box, the speed can reach 1.5 Gbps SATA standard) or (3 Gbps (SATAII standard), general now is new on the main board have ESATA interface, or could also buy a SATA turn ESATA connecting card, the price also is ten to dollars. In popularity, and USB2.0 USB3.0 before and can't meet the requirements of data transmission, ESATA interface hard disk box is certainly a good choice, other than the price also only ten dollars USB2.0 your just.

According to size points

Move hard disk the size of the box corresponding to the size of the hard drive, mobile hard disk into different box and 3.5 inches to 2.5 inches two standards. 2.5 inches move hard disk is used box notebook computer hard drive, the hard drive is very small, coat pocket can hold next, weakness is the price of hard drive capacity than on the high side, but also/rotational speed is slow, usually only 4200 RPM, so the data rate is low. 3.5-inch hard disk box is larger, but the 3.5-inch hard drive transmission speed, can use 5400 or 7200 RPM hard drive the mainstream of the large capacity, high speed, the price is cheaper also. In addition there is a multifunctional mobile hard disk box, size is 5.25 inches, it not only can be installed hard disk, also can easily loaded on cd-rom or burners, and become a external CD drive or burners, but it can't compliment, the volume of the portable performance sell at a discount greatly. In addition, what need reminds is, because most interface controller conversion restricted data transfer rate (less than 20 MB/s), even if is IEEE1394 USB2.0 interface and can not be fully play hard disk performance, hard disk itself performance gap will not have an obvious reflect. Therefore, the capacity of the choose and buy is the size and the price point. For most users, 150 ~ 300 GB for the capacity is enough to use, so choose 2.5-inch hard disk drive and hard disk box conforms to the portability of the requirements. And for some of the large capacity of the users, pursuit of 3.5-inch hard disk drive apparently the most cost-effective. Move hard disk of the parallel port interface box power move hard disk box all need external separate switch power, and USB interface and IEEE1394 interface may provide power supply, but only enough 2.5-inch hard disk drive used, and the 3.5-inch hard disk drive power consumption greatly exceed the USB can provide the range, so must use external power supply.