Sorry to revive such an old post, but life got in the way (had a baby) and I finally got back around to trying this.
I've updated the firmware on the Intel P3605 PCIe SSD and no longer see a "Device not ready; aborting initialisation" message anywhere in diagnostics, but still don't see the storage device showing available anywhere. Can't seem to figure out what else I might need to do.
tower-syslog-20230619-2028.zip