LaCie Big 12 Thunderbolt RAID no drive letter


Thread Starter
Oct 28, 2020
I had to re install WIN 10. It was pausing when opening files, stopped file sharing...
This RAID was working before the reinstallation. It's healthy. Basic partition with no drive letter
It's grayed out when I right click in Manage>drives>change drive letter and paths.
I have under CMD set it to automatically add external drives.
There is a thunderbolt card installed. The permissions appear to be set correctly.
The same drivers are installed that were working before.
I must be missing something but can't get it to work. If I shut it off it disappears from disk management.
Pops back up when I turn it on.

Tech Support Guy System Info Utility version
OS Version: Microsoft Windows 10 Pro, 64 bit, Build 19042, Installed 20201028180625.000000-240
Processor: Intel(R) Xeon(R) CPU E5-2690 v3 @ 2.60GHz, Intel64 Family 6 Model 63 Stepping 2, CPU Count: 32
Total Physical RAM: 64 GB
Graphics Card: NVIDIA Quadro K5200
Hard Drives: C: 930 GB (847 GB Free); D: 0 GB (0 GB Free); E: 446 GB (134 GB Free); F: 19560 GB (13710 GB Free); V: 1862 GB (1644 GB Free);
Motherboard: Supermicro X10DAI, ver 1.01, s/n NM14CS004434
System: American Megatrends Inc., ver ALASKA - 1072009, s/n S15694815220333
Antivirus: Windows Defender, Enabled and Updated


Thread Starter
Oct 28, 2020
Here are some of the screens I have been haunting in search of an answer.
I believe it may the Thunderbolt card drivers/manager. software. There are a lot of versions out there.
This is an X10DAi/c motherboard with a Rrocker RAID card and an intel TB card. I no longer see an attached device. This is a tough one. I have 40 TB of storage I can't use.



Apr 1, 2016
I really can't tell anything from those pics. And I can't lookup official drivers without a serial number.
Did you update all USB drivers from theboard manufacturer's website?

Try to upgrade both the Thunderbold software and maybe even the controller firmware.

But first you may want to consider calling Lacie and asking them

Sorry, not much help at all.

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