Help: Are those SN200 HGST (Cisco) Bricked?

[ElCoyote_]

A friend of mine (also a T640 user) got those of these cards:

# nvme list
Node SN Model Namespace Usage Format FW Rev
--------------------- -------------------- ---------------------------------------- --------- -------------------------- ---------------- --------
[...]
/dev/nvme2n1 SDM000000000 UCSC-NVME-H38401 1 3.84 TB / 3.84 TB 4 KiB + 0 B KNCCD122
/dev/nvme3n1 SDM000000000 UCSC-NVME-H38401 1 3.84 TB / 3.84 TB 4 KiB + 0 B KNCCD122

the cards came with v111 of the firmware so he placed the cards in his Fedora Workstation to flash them just like I did (using the exact same payload but the 'nvme' tool from Fedora).
The flashing to v122 went fine but after moving them into the T640 machine, they started flashing their back LED in a specific sequence (3 green blinks and 16 orange blinks) and the cards do not show up anymore on the PCIe bus of either the T640 and his Fedora box.

Has anyone encountered something like this? If so, what was your solution?
I have 6 of the same cards which I am using in my T630 and T640, flashed them under RHEL8 and never had an issue.

 

[ElCoyote_]

Correction:
T640: Green stays solid, Amber blinks 16x, recognised by BIOS Setup, Capacities show Serial # instead, Slot 5 shows 122, 1-4 shows 111

 

[ElCoyote_]

A little update:
- The drives had gone to Diagnostics mode.
We got them out of Diagnostics mode with:

dm-cli capture-diagnostics -p /dev/nvme0 --file junk_filename --clear-diag-data

- The drives do not work in BIOS/Legacy mode, which is why they were falling back into Diagnostics mode on every reboot.