HDD cable and external power options

Click:4528Time:2013-10-29 10:04:11

 HDD cable and external power options 

    With the increase of storage media and improved cost-effective mobile hard disk, the user can select the storage devices become increasingly widespread. Here are the next hard drive cable Yingdong choice. 

    Mobile hard drive cable and an external power supply drives the choice of the three killers are electrostatic, power supply, shock, 2.5-inch hard drives now commonly used liquid bearings, seismic performance greatly improved, static electricity which can only help a good chassis power supporting ground and power connection solutions, power supply is configured to drive box itself to solve, 3.5 inches, 2.5 inches, 5.25 inches, SATA interface and 1394 FireWire removable disk cartridge to be dependent on the external power supply hard drive operating current, so I chose this type of mobile hard disk must consider the switching power supply that comes with the performance, 3.5-inch and 5.25 inch switching power supply generally require more than 1.5A of output current, text-wave factor is better, comes with protection circuit (sudden increase or decrease when the voltage and short circuit can be quickly cut off the power to protect the hard disk will not be burned), the voltage should be stable, if your hard drive in 80G or more, an absolute requirement for more than the output current to 2A, because otherwise the hard disk at startup current lack of a "clicks" "clicks," the voice started again, and some do not even turn. If the hard drive long-term power supply shortage in the state, will produce large amounts of physical bad hard disk, hard disk over time resulting in total loss! Now have the hard drive box with a nominal supply current of 1.5A, did not actually meet, which is to special attention. 

    As for the 2.5 in. HDD Enclosure USB interface powered by the USB bus, usually a USB port maximum output current of 500 mA, current hard drive is rated for 500 mA or so (typically 700 mA Seagate about Hitachi Some large-capacity 5400 rpm hard drive will be more than 500 mA), but the hard drive starts the moment the current is about 1.0A generally, if the moment of starting current is not too hard, cause voltage drop, when the USB interface when voltage drops below 4.6 volts hard drive will not function properly, the hard disk will be issued at this time the sound starts again, the performance of hard disk turn about to stop, then restart the switch, then stop, and so forth cycle, so that the maximum damage to the hard drive, will have a lot of bad physics Road, so the high-end mobile hard disk box are generally equipped with a special USB cable to solve this problem, first take is the use of auxiliary power interface with USB cable, USB interface, so you can solve the maximum supply current of only 500 mA bottleneck, and secondly, the use of transmission lines as thick to reduce the current transmission loss, we all know, the current in the wire transfer process due to the inherent resistance, there is a loss, the same length of thicker wire transfer impedance of the smaller diameter, so that current transmission loss of the smaller, high-end mobile hard disk box is generally used wire 2028, and some hard disk box in order to reduce costs, number 2428 on the use of wire, even with 2628 numbers, 2428 numbers using this wire to do USB cable if you use it to load more than 40G 5400 rpm hard drive is definitely a problem, it is easy to produce a permanent hard disk physical bad! In particular, if the computer is a laptop or the old computer was previously the case, may have difficulty even start! 2628 line, not to mention. 

Shenzhen Hua Zhongxin Technology Co., Ltd. specializing in the production, various product UL cable, low voltage cabinet sets of cables, communication cables, data cable, monitor cable, cell phone charger cables, IEEE1394 cables, USB series cable, audio cable , PC connection cable wire harness and other wire. Companies in good faith, innovation, entrepreneurial spirit, with its highly effective management team, leading technical strength, perfect service system, invite friends in the industry and sincere cooperation, we would like to develop together! Grow together! Create brilliant! 

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