0
Thanks

A few words of thanks would be greatly appreciated.

Myth - A Hard drive is quicker than usb flash drive

Myth

A hard disk is faster than a USB key.

Reality

TRUE ... but in most cases.

Explanations

  • Hard drives and USB keys are different on the technology used.

Hard drives are mechanical: magnetic trays on which to move the motorized arm.

  • USB keys are electronic: they are mere fleas.

So who is the fastest?

In fact, everything depends on how to use them.

Hard drives have a disadvantage: It takes time to move the playhead to the right place, which takes considerable time. But once the head in the right place, the data rate is phenomenal.

The USB key, it has a very low speed compared to the hard drive. But it did not playhead to move: it therefore immediately accessible at any place of "hard".

Summarize

Hard disk:

  • Slow to get to the right place
  • Very fast transfer

USB key:

  • Very quick to get in the right place
  • Slow transfer

Consequences

Reading large files will typically be faster on hard disk, because the travel time to the file is negligible compared to the time you will read the file.
Reading a large number of small files will often be faster on USB key, since much time is given to fetch the files in the right place. (On a hard disk, the 'crépitements "which means for example when the operating system starts to look or files).

It was after this observation that Microsoft has tried to set up ReadyBoost technology, but without much success.

The problem of access time of hard disk can be mitigated by regular defragmentation.

Note that the disc SSD (Solid State Disk, consisting of memory similar to the USB key), it also gets rid of problems of access time, which offers very attractive performance.
The SSD disk controllers have interlacing algorithms to the records on different chips and use a cache to reduce the problem of flow.

In a way, they meet the best of both worlds.

0
Thanks

A few words of thanks would be greatly appreciated.

Ask a question
CCM is a leading international tech website. Our content is written in collaboration with IT experts, under the direction of Jean-François Pillou, founder of CCM.net. CCM reaches more than 50 million unique visitors per month and is available in 11 languages.
This document, titled « Myth - A Hard drive is quicker than usb flash drive », is available under the Creative Commons license. Any copy, reuse, or modification of the content should be sufficiently credited to CCM (ccm.net).