Pending USB with ReadSpeed and SpinRite.exe - v6.0, Windows 10 Pro, v. 20H2, BitLocker ON

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New member
Sep 30, 2020
Hi all,

My Laptop, a Dell Latitude 3590 has a TPM module and has its main drive ( C: ) BitLocker encrypted (by myself after). Operating System is Windows 10 Pro, version 20H2.

I had prepared a bootable USB containing ReadSpeed, that I previously had executed successfully on the same laptop (main drive analysis).

Previously, I had in vain attempted to run SpinRite on the Laptop using:
a) a USB-connected DVD-drive having *SpinRite.exe installed on it , and
b) a bootable USB, with SpinRite.exe on it.

During those (failing) attempts I did edit the following entries in the BIOS menu:
a) Secure Boot/Secure Boot Enable, in order to disable secure boot,
b) Advanced Boot Options: Enable Legacy Option ROMs, in order to alternately select and unselect that option
c) Then, in the Boot Order Menu, I alternately selected either under Legacy Option: DVD or USB, or under UEFI: DVD or USB respectively
All combinations of attempts failed. And the combinations using Legacy Option: DVD or USB, resulted in a Dell Start Test Program being executed with no successful exit.

So after this, I now wanted to attempt using the functional ReadSpeed bootable USB, just adding SpinRite.exe to it (in the same folder as rs.exe), with the purpose of using it to check the main drive ( C: )

I proceeded as follows:
a) Before Reboot I temporarily disabled BitLocker on main Drive ( C: ) as administrator ("manage-bde -operators c: -disable")
b) At reboot, in the BIOS menu (reachable using F2), I disabled Secure Boot/Secure Boot Enable, and saved
c) I logged on normally on the laptop, in order to once again disable BitLocker on the main drive, as under a) above
d) Then, I rebooted and opened the Boot Order Menu (reachable using F12), selecting UEFI/USB
e) ReadSpeed executed normally, on the main drive ( C: ), and was duly analyzed, without any problems.
f) Then, finally, after ReadSpeed execution had gone to an end, I entered, at the (Free)DOS prompt "SpinRite.exe" and it started execution.
g) However, the main drive ( C: ) was not available, only the USB drive itself was found (16 GB), and could be analyzed by SpinRite.

Erroneously, apparently, I had expected that SpinRite would have access to the main drive and be able to analyze it.
What did I do wrong, or?

Please, If you know how to enable SpinRite to analyze the main drive, on my laptop, I would be thankful to know how that could be done!

Best Regards, Barris


Sep 17, 2020
Is your main drive controller in AHCI mode? if so, SpinRite 6.0 will not be able to see it. (SpinRite 6.1 will be able see it!)

SpinRite 6.0 is IDE only. ReadSpeed is fully compatible with both AHCI and IDE.

So ... take a look in your BIOS settings for AHCI mode and see if there is any option for ATE, IDE, or Legacy?

Note: The ReadSpeed output will indicate if your main drive controller is AHCI.


New member
Sep 30, 2020
Dear Dan:

You asked if my main drive controller is in AHCI mode. No, it is in RAID NO mode.