Slow internal disc to disc file transfer speed

Question

I ran the HDTune drive monitor while I was transfering about 80 GB of various sized files, most of which was running about 40 MB/s, but you can see where it spiked down to under 1 MB/s.

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I ran a few more tests with HDTune. It seems one of these drives is having some issues:

Is this perhaps just a faulty drive?

I will try a few more transfer tests between both HDD and a third HDD to see if I can get some consistent higher speeds.

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When deleting files it can drop from 700 items to 200.

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New motherboard - GA-990FXA-UD3

New HDDs - Samsung 2 TB HD204UI

New SATA cables - came with the motherboard

File transfer speed from one to the other can go anything from 150 MB/s to under 100 KB/s.

A typical file transfer could be an 8 GB ISO file, it will start off at about 150 MB/s flying along, but as it goes it will slow right down, usually to about 15-30 MB/s and occasionally right down to below 100 KB/s.

I have tried disabling antivirus (Avast!), no change.

I have tried an alternative transfer method/program (TerraCopy). It gives a more stable transfer speed, but it's still quite low, usually a solid 15 MB/s.

And I have checked both drives with HDTune, which reports no obvious problems for either drive.

What can I do to diagnose this further or better yet, fix this?

Solution

Probably a faulty drive, i forget what happened. Self answering to close this 4 year old thread.

Comments

[Jason]

If you ever have doubts whether you have a faulty drive, start with the drive manufacturer's diagnostic. In this case SeaTools.

[Andrew Morton]

Just because the SATA cables are new does not mean they work properly.

[Ignacio Vazquez-Abrams]

The asker is already using two separate drives.

[surfasb]

Didn't see the (s). I'll edit my answer.