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Thecus NAS USB Crypt Key – How to Backup?

Hej,

I encrypted my Thecus n2350 RAID. I would like to backup the key from the usb Image.

I plugged in the USB Stick to my Linux, fdisk -l show a /dev/mapper/luks-c1f80955-5030-4fa6-96ad-db828556a5f5 and I tried to open it with cryptsetup -> No valid LUKS Device.

Can some one give me a hint, how to backup the Crypt Key? I have no experience with encrypted devices.

Looking forward for your help! 🙂

Bye

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