Validrive instructions

  • 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.)

Adam P

New member
Oct 12, 2023
My reading of the instructions for Validrive would lead me to believe that the random 4k blobs are written and read to their various locations without regard for whatever data might be there already, but there doesn't seem to be an explicit statement about whether or not this is safe to run on a drive which has already been put into use. Will this utility scatter corruption through existing files or not?
I don't know if anyone has tried this yet, but I ran ValiDrive on a 1TB Kingston flash drive- mine tested as valid. The entire device was encrypted before the test, and has decrypted fine since. Of the few tested flash drives so far all were valid. Two dead flash drives which Windows no longer recognizes of cause did not run. I did see some large differences between read and write timings, but that has been explained. Perhaps an odd test case, I ran ValiDrive against an Apricorn 128GB Secure Key (after unlocking it) and it passed. Another great utility, thanks Steve!