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Slow Write Speeds on WD 500gb Cavier Green, Windows 8, Controller Mode Set to IDE not AHCI

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June 4, 2013 4:17:50 PM

Hi

We have a Windows 8 computer with a Wolfdale 1333-d677 GA 2.01 motherboard.
http://www.asrock.com/MB/overview.la.asp?Model=Wolfdale...

I did an as ssd check on the drive, turns out the reason for its poor performance is a 2MB/S write speed instead of about 60MB/S which is what the read speeds are.

I have swapped the SATA cables around, put it in other ports, but to no avail. There is only a DVD rewriter plugged in, no other hard drives. The drive was made in 2009 and is a WD Cavier 500GB Green.

I have not installed any drivers for this device as there arnt any for Windows 8 or even windows 7 as per the motherboard home page. The intel driver update utility also did not offer any downloads, it only said it was correct, it is the standard one that comes with the installation. 6.2.9200.16579 21/06/2006 Microsfot Corporation.

If i look under system it is just the standard microsoft one, theres no mention of SATA or AHCi or the motherboard chipset.

I have noticed from using the IntelĀ® Chipset Identification Utility that the i/o controller is in IDE mode, even though i am certain this board support AHCI mode.

I see it is possible to activate AHCI using the following instructions.
http://www.ithinkdiff.com/how-to-enable-ahci-in-windows...

The Bios is set to enhanced mode already so this is not a problem.

I dont want to try this though until im certain that it will be supported otherwise the device is unlikely to boot. I assume the vista drivers wont work, even in compatibility mode so havent tried this and i am unsure of which Intel chipset drivers to download. If you have any ideas particularly if you know of any current intel drivers that would be supported, your help would be appreciated.

Regards

Peter


Intel Chipset ID

Detected Chipset:
Intel(R) 945 Express Chipset Family

Chipset Components

Memory Controller:
Intel(R) 82945G/GZ

I/O Controller:
Intel(R) 82801GB/GR I/O controller hub (ICH7/ICH7R) SATA Controller found in IDE mode

Integrated Graphics:
Intel(R) 82945G/GZ Express Chipset family




a c 906 G Storage
a b * Windows 8
June 4, 2013 4:44:49 PM

Write speed is always slower than read speed plus as the drives heads work their way into the center of the platters the performance drops due to the slower spinning of the platters. How full is your drive? when was the last time you ran defrag?

Going from ide to ahci on an hdd is not a huge increase in performance. A mechanical drive might use a high speed interface but it cannot use all of that bandwidth, not even half of it.
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June 4, 2013 4:57:42 PM

popatim said:
Write speed is always slower than read speed plus as the drives heads work their way into the center of the platters the performance drops due to the slower spinning of the platters. How full is your drive? when was the last time you ran defrag?

Going from ide to ahci on an hdd is not a huge increase in performance. A mechanical drive might use a high speed interface but it cannot use all of that bandwidth, not even half of it.


Very true but I doubt it would deteriorate right down to 2MBPS. It actually has 2 partitions, i am referring to the C partion which is only about 25% full in any case 50gb of 200gb. Its fully defragged. D partition is about 75% full at this time and not defragged too well, 200gb of 270gb approx. I will continue to clear more items and defrag d although I doubt this is the problem and how this would affect performance on the C partition.

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June 6, 2013 1:58:09 PM

Solved, write caching wasnt enabled for this HD. In conclusion I assume anyone who has a slow write speed, particular below 10MBPS which is considerably loiwer than their read speed should ensure this is activated on their drive. Downside is data loss is increased particular on older drivers if your machine shuts off suddenly i.e. power failure.
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November 27, 2013 12:44:42 PM

If after enabling the write caching it disables automatically, this is most likely caused by drive failure.
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