What is the Best Data Transfer speed of USB 2 External HDD?

Question

I have an External HDD and, I get arround 27.3 MB/sec data transfer speed.

Is this the best speed i can expect from it?

Answer 1

If you have nothing else plugged into your USB ports,you should be able to get close to 40 MB/sec.The true rate is supposed to be 60MB/sec but that never happens.

Answer 2

What is USB 2.0?

USB 2.0 is the industry standard peripheral connection type for most x86 computers (Windows based). This specification is rated with maximum transfer rate of 480Mb/s (60MB/s). Sustained transfer rate of USB 2.0 depends on many factors including type of device in use, data being transferred, and speed of the computer system. A normal sustained data transfer rate for USB 2.0 ranges from 10-30 MB/s. Only burst data transfers can reach the 480Mb/s rate.

Answer 3

pender2112 is right; i'll function greater guidance: often Mbps potential Megabits consistent with 2nd, and MBps potential MegaBytes consistent with 2nd. there is not any longer something incorrect inclusive of your USB port or your exterior hard disk stress. I even have seen the same element with my exterior hard stress. With transportable hard drives, the type that get their skill purely from the USB port, I even have seen archives pass expenses of approximately 20 MBps (MegaBytes consistent with 2nd). those hard drives have slower rotation speeds than do the three.5" hard disks utilized in exterior hard drives. the three.5" hard disks utilized in exterior hard drives often have slower rotation speeds, such as 5400 rpm. The hard disks fastened internally in pc or tower situations have larger rotation speeds, such as 7200 rpm or 10,000 rpm. The slower rpm potential decrease skill intake and much less warmth generated - you do no longer want a warm hard stress interior that small enclosure. So the shrink is your hard stress. The stress only can't examine or write speedier than 25 Mbps, the rotating platter velocity is the shrink. including some greater data with regard to the USB ports: cheapest computers have a single USB controller on the motherboard, and all of the USB ports would desire to bypass their USB archives by using that controller to get to the processor. So in case you have better than one USB gadget related, such as a keyboard and/or a mouse, the controller is sharing the relationship between each and every of the contraptions. this could gradual the archives pass velocity down purely somewhat too. attempt copying archives from one USB-related stress to a diverse USB-related stress and spot the archives pass velocity somewhat pass gradual. that's the reason some individuals do in contrast to USB keyboards and USB mice. I desire playstation /2 keyboards and mice. There are PCI boards accessible that supply further USB ports, the style of card has its own USB controller. those ports would properly be used for the slower and much less-commonly-used USB ports, letting the motherboard USB ports shield the better-velocity peripherals. TonyRB Monday, December 21, 2009

Answer 4

Sounds about right.