Bigger files = slower write speeds

Inazuma · 30 Mar 2011 at 15:44

I have noticed that when copying something from one hard drive to another, that the bigger the file size, the slower the write speed becomes. Example, I tried to copy a 60gb folder to my hard disk and the write speed dropped to around 1 mb/s and said it would take 24 hours. I stopped it and started moving folders individually. Some that are just a few GB big transfer at 60mb/s. Whilst one that is 12gb big, transfers at 10 mb/s.

Why is this?

Windows 7 64bit
8gb ram
Q6600 @ 3.2 ghz

Copying from
SEAGATE BARRACUDA 500mb 7200.12 16MB CACHE
to
Samsung SpinPoint F4 EcoGreen 2TB SATA-II 32MB Cache

Surveyor · 30 Mar 2011 at 18:05

Have you enabled write caching?

Device Manager - right click on hard disk and select properties - Policies tab and enable write caching.

Inazuma · 30 Mar 2011 at 21:50

Yep it's ticked.

Must be just something to do with the way Windows handles file transfer by default.

I've installed a program called TeraCopy now, and I'm getting much better speeds.
http://www.codesector.com/teracopy.php

Bigger files = slower write speeds

Inazuma

Inazuma

Surveyor

Surveyor

Inazuma

Inazuma