Windows 10 system vs user profile results

  • SpinRite v6.1 Release #3
    The 3rd release of SpinRite v6.1 is published and may be obtained by all SpinRite v6.0 owners at the SpinRite v6.1 Pre-Release page. (SpinRite will shortly be officially updated to v6.1 so this page will be renamed.) The primary new feature, and the reason for this release, was the discovery of memory problems in some systems that were affecting SpinRite's operation. So SpinRite now incorporates a built-in test of the system's memory. For the full story, please see this page in the "Pre-Release Announcements & Feedback" forum.
  • Be sure to checkout “Tips & Tricks”
    Dear Guest Visitor → Once you register and log-in please checkout the “Tips & Tricks” page for some very handy tips!

  • BootAble – FreeDOS boot testing freeware

    To obtain direct, low-level access to a system's mass storage drives, SpinRite runs under a GRC-customized version of FreeDOS which has been modified to add compatibility with all file systems. In order to run SpinRite it must first be possible to boot FreeDOS.

    GRC's “BootAble” freeware allows anyone to easily create BIOS-bootable media in order to workout and confirm the details of getting a machine to boot FreeDOS through a BIOS. Once the means of doing that has been determined, the media created by SpinRite can be booted and run in the same way.

    The participants here, who have taken the time to share their knowledge and experience, their successes and some frustrations with booting their computers into FreeDOS, have created a valuable knowledgebase which will benefit everyone who follows.

    You may click on the image to the right to obtain your own copy of BootAble. Then use the knowledge and experience documented here to boot your computer(s) into FreeDOS. And please do not hesitate to ask questions – nowhere else can better answers be found.

    (You may permanently close this reminder with the 'X' in the upper right.)


New member
Sep 24, 2020
Drive 81 is a Windows 10 system drive. Drive 82 is considered a "data" drive. I have moved my Windows user profile (%USERPROFILE%) to drive 82. From these results it would appear that Windows hammers the user profile the most.


@DoubleD : You might try running with the /1 option to breakout the individual performance of those 1GB benchmarked transfers into their 64 sub-block speeds. That'll give you some sense for how "widespread" the slowdown at the front of that drive is.
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Interesting. It looks quite widespread in the first 25% of the drive. Since it is a 1.0TB drive I'm waiting with anticipation for Spinrite 6.1! :coffee:

Thank you for all the great tech.


But your 850 is about half and 860 about a quarter of my speeds with these drives. Even when ignoring the problem areas, they seem limited by a slow interface or something? 137MB/sec. for an EVO is quite atrocious.

Thank you; I noticed that, too. This is an old mainboard, DFI LP JR GF9400-T2RS (circa 2008?), which has SATA 2.0 (Serial ATA-300) interfaces. I believe the above result was due to an inferior BIOS setting (IDE?). After switching BIOS to use the AHCI controller I had these results:


The odd thing is why drive 81 and 82 reached full speed and not drive 83 on the 2020-12-31 at 10:58 run. :confused: