[SOLVED] Fake transfer speeds?

[kerangovender]

Hello everyone

Sometimes when I'm transferring files, I get a very unrealistic transfer speed in windows for the first second.
All my hard drives are SATA 2 (300MB/s). The one I copied it to was in a USB 3.0 enclosure connected to USB 2.0 port

My PC has SATA 2
My PC only has USB 2.0

The theoretical max speeds for me would be 300 megabytes/s for SATA and 60 megabytes for USB.
Why am I getting +-1.47gb/s as that is way faster than SATA 3. Then it drops to +-30MB/s which is normal for USB 2.0.
That speed is not right and I want to know why.
How can caching make a drive faster than its rated speeds?

 

[Newtonius]

Are the gb/s all lower case letters? If so then it's saying 1.47 gigaBITS per second, not to be confused with gigaBYTES. Which is 183 MB/s when you do the conversion.

 

[USAFRet]

Because the small cache space is monumentally faster than the actual drive.
That's what it is there for, a small space for the initial small set of data.

Additionally, it matters hugely what you are transferring, and from what.

 

[kerangovender]

Are the gb/s all lower case letters? If so then it's saying 1.47 gigaBITS per second, not to be confused with gigaBYTES. Which is 183 MB/s when you do the conversion.

Its gigabytes per second
It's still faster than SATA 3 even if measured in gigabits/s