Deleted Reg Key Returns on rebbot

25 pts.
Tags:
DMA
Key
PIO
Registry
I became aware of a problem with sata hard drive speed, HD Tune test Average read 3.4MB/s !!! ide hard drives fine Average read 46.2MB/s and 38.4MB/S. To try and solve a PIO to DMA problem, I tried to delete all occurrences of "MasterIdDataCheckSum" and "SlaveIdDataCheckSum" in the registry with regedit, but they re appeared on reboot. "MasterIdDataCheckSum" cyclic redundancy check is a left over from the old days where any error dropped the settings from DMA to PIO. Any ideas on why and how to make the delete permanent? I found the DMA PIO solution with Vivisimo but searches for the above reg delete problem were unsuccessful. I would be so grateful for a solution!!

Answer Wiki

Thanks. We'll let you know when a new response is added.

Most system registry keys like this will come back automatically when Windows restarts because Windows expects them to be there.

Have you tried moving the hard drive to another machine to make sure that it’s not a problem with the physical disk?

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  • Tonib95
    Thank you for answering. This is what I have done. 1 Checked that the hard disk is OK in an external case. It is. 2 Put another SATA hard disk on the SATA outlet on the mother board with resulting bad data transfer times. 3 Switched both SATA hard disks between the 2 Serial ATA Connecters on the motherboard bad resuilts from both on both. 4 Checked the SATA cable it is OK. 5 Checked the SATA cable is properly connected at both ends. 6 Tested both installed IDE hard disks they function fine with Average read 46.2MB/s and 38.4MB/S. 7 Checked that DMA is "Enabled" also "Auto" in the BIOS. 8 Done a clean install off W2K. 9 Deleated everything under IDE ATA/ATAPI Controllers several times. 10 All of the above in every imaginable combination. None of which has helped I have read about the "Delete "MasterIdDataCheckSum" and "SlaveIdDataCheckSum" in the registry" workaround several places, and have read that it has worked for some with hardrive PIO piss as I have. BUT When I try, after reboot they and the PIO problem are back again. SO As a last resort I am trying to find out how to make the deletes permenent as maybe that might help. Maybe they cannot be deleted permenently, but as a last resort I thought it might help. I not an expert by any means, but can usually find answers to all my problems by searching with Vivisimo, this time I am stumped. Any new ideas will be gratfully received. Hilsen tonib95
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  • Tonib95
    WELL I FIXED IT As I had the latest drivers from ASRock installed ( my motherboard is 775VM800), I thought that that was OK. But inspired (clutching at straws ) by a post I had found with Vivisimo http://vivisimo.com/ ( by me by far the worlds best search machine, results sorted into folders and a list ) POST "If your system uses an Intel chipset you can install the Intel Application Accelerator instead of the Microsoft IDE driver. The Intel driver gives you explicit control over DMA modes thru a separate utility program. I noticed one of my laptops running really slowly, saw it was in PIO mode, and none of the other fixes worked. Uninstalling the device and switching to the Intel driver made that problem go away. The IAA is a free download from www.intel.com." I went to VIA's homeside and downloaded ( my chipset VIA P4800 PRO South Bridge VT8237R Plus ) VIA Hyperion Pro Driver Package. It is a much better organised package than the ASRats and has much later stuff. It has a Chipset INF Update Utility AGP Driver PATA IDE Driver Package SATA IDE Driver Package INSTALLED AND SATA DRIVE UP TO 54.4 MB/s Moral of the story Go To The Source. As we say in Danmark "Skide godt Egon" Kærlig Hilsen tonib95
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