Speed is slow

I have a WD Passport Essential SE 1TB which is compatible  with the USB 3.0.

At first use, transfer speed would reach around 60 MBps but now, it ony reaches around 40MBps. I dont know what’s wrong.

Help me. :c

Hello,

Have you test your drive using a different computer? Did you get the same transfer rate?

Transfer speed would drastically vary on type of files you’re coping. Here is an example of My Passport Essential SE 1TB,


CrystalDiskMark 3.0.1 © 2007-2010 Crystal Dew World : http://crystalmark.info/


* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read :    28.898 MB/s

Sequential Write :    22.889 MB/s

Random Read 512KB :    12.639 MB/s

Random Write 512KB :    22.143 MB/s

Random Read 4KB (QD=1) :     0.466 MB/s [   113.7 IOPS]

Random Write 4KB (QD=1) :     0.779 MB/s [   190.1 IOPS]

Random Read 4KB (QD=32) :     0.528 MB/s [   128.9 IOPS]

 Random Write 4KB (QD=32) :     0.834 MB/s [   203.6 IOPS]

Test : 1000 MB [W: 21.2% (197.7/930.9 GB)] (x5)

Date : 2011/02/07 1:06:29

OS : Windows 7 Ultimate Edition [6.1 Build 7600] (x86)