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February 27th, 2025 15:48
External USB disk visible only after reboot
Hi,
I've a T640 with Windows Server 2019.
I use external USB disks for backup, rotated daily.
Sometimes the external disks are not recognized: they don't show up in Device Manager.
As soon as I reboot the server, the disk is correctly recognized.
Some day later, after I change the disk, the new disk is no longer recognized.
Suspecting an hardware issue on the USB port/controller, I installed a new USB adapter card, but the issue persist.
Disks work correctly on another PC.
While the server is rebooting it goes Blue Screen and then restart correctly.
Latest Blue Screen error was 0x00000139 (KERNEL_SECURITY_CHECK_FAILURE).
DSIM and SFC show no errors.
Time for a new server??
No Events found!
DELL-Charles R
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February 27th, 2025 19:58
Hello,
If you hit refresh in Device Manager does it show correctly?
I think it is under Device Manager > Action > Scan for hardware changes
You may have to click on the System Name.
Do you have Windows up to date?
Have you tried the Front and Rear USB ports
There are USB 2.0 and USB 3.0 on the front and rear. Have you tried each?
You may also run the build in hardware diagnostic to test the hardware.
Boot to <F10> for LifeCycel Controller and run the Diagnostics.
You may also try different manufacture USB device because we don't validate USB disks.