I have 10 hard drives on my computer. 4 internal and 6 external (USB2). I noticed lately that one of the External ones (Seagate FreeAgentDesktop 1000) has a VERY low write speed when copting files to it.

I did a test with HD Tune Pro and low and behold, all of my other HDDs have a write speed of 25MB\s and the problematic one has a write speed of 5MB\s.

I did many kinds of tests on the drive but every one SAYS that the drive is healthy. Not overheated, not fragmented, nothing.

I GOOGLED this issue and can't find any solution for this PROBLEM. Any ideas?

Thanks.Have you tried another USB port to eliminate the port as the source of the slowdown?
Yes I have tried all USB ports on my computer and other computers. Also, it's set to use DMA in case someone asks.Have you eliminated the cable from the drive to the port as a cause.....You might want to have a look at this website......there may be something for you .... especially the paragraph where DMA switches to PIO and a slowdown occurs.

http://winhlp.com/node/10Actually, that I have not tried yet (cable\wire) . The drive is in use so I will try it later.

About DMA, it is not reverted to PIO as I mentioned in my post. It is set to DMA.After trying the cable if it's still slow i would DLoad and run the SEATOOLS diagnostics on it...
You didn't happen to install the Free AGENT software on it did you ? ?I tried the Seagate tool. All came out healthy. I just couldn't do a write test because it can't have a partition on it to do a write test and I would have to format to do that. But anyway, I already did a write test with HD Tune so I know the problem exists.

I don't use the Free Agent software but installed it because it has a diagnose tool as well. Since it's an external why not try and run the tests on another PC ? ?
It may be the machine's fault though i doubt it.I did that already but thanks.