So the makers of it had challenges setup. By the time I stumbled on it, only the last challenge was left, with 6 months remaining. For that challenge, the reward for cracking an 8-character alphanumeric password was 20 BTC (and BCH and BTG!), which was worth over $100,000 USD at the time of the challenge end date.
UPDATE 14 MAR 2020: For discussion, see the Google group. Comments from the old WordPress site have been migrated there.
I bought and really like my Kenwood Excelon DDX9903S headunit. I had it in my WRX, and moved it to my LS430. It supports Android Auto and CarPlay, which I find really useful when driving.
However, it has a nag screen every time it boots up. This got me curious as to how it worked, and see if it could be patched to skip this disclaimer. I figured it probably ran Linux on a SoC, as pretty much everything does nowadays. So I grabbed the latest firmware for it (mine was already updated to it), and started probing.
Extract that and you get 3 folders under S_V2_7_0008_0600/:
BOOT_V2_7_0008_0600_release/ MAIN_V1_0_2758_0400/ SOC_V2_7_0008_0600/
My RAID6 was originally planned with 6 drives, but only had 5 for a while due to space concerns with the case. However, I found as a file, media, and multiple cryptocurrency node it filled up the 2.7TB pretty quickly. So, I got a new case (and some more RAM), which has proper space for 6 3.5” drives (and 2 5.25”). When migrating to this I decided to add the extra 1TB WD Red NAS drive I bought but have not been able to use.
The case is a Fractal Design Define Mini, and I am thoroughly impressed. Six 3.5” slots, two 5.25” external slots, and lots of sound padding on the doors and sides.