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HDD speed limited to 20 MB/s in Lenovo T60.

Last response: in Storage
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August 2, 2013 8:30:24 AM

Hello!
My problem is that my HDD (HITACHI HTS541680J9SA00 (80 GB)) has limited speed to 20 MB/s.
Screenshot from HD TUNE:



S.M.A.R.T. is OK!

I have the newest driver for Intel SATA controller ICH7-M (9.1.9.1004).

Very important screenshot from Ubuntu LiveCD:


As you can see speed is normal for this HDD, so there's something wrong in Windows (not BIOS)!


Why is it limited?

Cheers!
a c 78 G Storage
August 2, 2013 8:49:21 AM

Considering that the HDD is not even a sata2 (it is only 1.5MBs speed) and a slow 5400 RPM and only a small 8MB cache parred with a low end laptop & chipset, that speed is not so bad.
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August 2, 2013 8:51:08 AM

20 MB/s is bad. On SATA I disks can get up to 150 MB/s speed. On Windows 7 I should get the same speed as on Linux (average 38 MB/s)! You can also see that graph doesn't look normal. It should go down, but my graph is (almost) constant at 20 MB/s (even at the end of line!).
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August 2, 2013 9:03:25 AM

depends on how full the drive is and what bus the drive is connected to and the type of drive .. you wont get max rated speed with a full drive it if it is an ide drive then I would consider upgrading but to be honest with the speeds your getting on that drive you might be better off getting a usb 2.0 external drive because you will end up with about the same in data rate if not better.
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a c 78 G Storage
August 2, 2013 9:05:28 AM

Your chart shows that you are getting a minimum of 1.5GBs. And higher. You are getting more than the HDD is rated for. Comparing the 2 OS's is like comparing apples to oranges. Ubuntu, is a leaner OS which probably helps too. Also, those are two different types of graphs, another apples to oranges comparison.
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August 3, 2013 3:48:32 AM

TrueCrypt was the application that caused limit of 20 MB/s.
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a c 78 G Storage
August 3, 2013 7:42:35 AM

Good to know. Is the whole HDD encrypted? I have my main computer's ssd totally encrypted. I am still getting speeds close to what the ssd is rated at. Although the Trim function has stopped working and I'm having to optimize the sdd manually every so often.
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August 3, 2013 7:53:52 AM

Yes, whole HDD was encrypted. I decrypted it and I'm getting the same transfers as on Ubuntu.
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!