Colin Quinn and the Art of Mining Rig Maintenance

I’ve been doing a lot with cryptocurrency mining lately, so there’s been a lot of activity here on rsts11 about it as well. For this post, a lot of the concepts can apply to a home lab in general, although it was inspired by several conversations on mining channels on Telegram and Discord over the past month.

In the late 1980s, actor Colin Quinn was an announcer on a game show called Remote Control. It’s not terribly remarkable in context, but as I’ve had a few people of differing technical levels ask about remote control for their mining rigs, it seemed relevant. 

Whether you’re managing a single server, a home lab, a mining rig, or an entire farm, it’s likely that your gear will not be in  your home office or possibly not even in your home at all, but you won’t want to travel to where the gear is everytime something needs to be power cycled. In the case of one of the people I consulted for recently, he was going to deploy mining rigs at a friend’s house in another country, and would not be able to be hands-on with the gear more than 2-3 times a year.  

So the considerations I’m making here are tuned for a relatively small number of systems that may not have IPMI console access, and may not have convenient access or remote hands services available. In a datacenter or similar environment, you may have contracted services to send someone to hit the reset button or look for issues. For many of my readers, this is not a luxury you’ll enjoy. 

My own remote access adventure happened when my oldest mining rig was a few miles from home. Thanks to my Meraki networks, I did have direct VPN access, but the rig would occasionally crash and require a physical power cycle. It was only 5-10 minutes each way, and I did have 24/7 access to the facility, but it got very inconvenient at times. 

The considerations I’ll layout here fall into a couple of categories. 

  1. Network access (usually via VPN of some sort)
  2. Console access (remote KVM)
  3. Power control (remote power controller over Ethernet, via #1 above)

Disclosure: Neither Robert M Persig, Colin Quinn, nor Ken Ober have any association or endorsement or even awareness of this blog post. 

Continue reading

Wrestling with an ONDA B250-D8P-D4 mining motherboard

Most casual crypto miners use a conventional motherboard, especially if they have a PC/case/power supply with sufficient PCIe slots for their GPUs. But when you get beyond 2-4 GPUs, you either need a rat’s nest of riser extenders, or maybe (just maybe) a dedicated mining motherboard.

I recently got a new-to-me mining motherboard, and found it painful to find some information and resources I needed. I’m aggregating this information in this post, and it will get updated as I get more relevant experience with the ONDA motherboard in question. If you have any info to share, feel free to comment below and I’ll update. (Last update 2021-03-14)

I’ve mined with an Octominer 8-slot motherboard for 3 years now. In addition to an onboard Celeron 3855U and a single DDR3 SODIMM RAM slot (max of 8GB), it has eight PCIe x16 slots, so you don’t need to use the common x1-to-x16 risers. It’s complicated in that you have to power the motherboard with a number of additional power connectors (in this case, 6-pin PCIe power leads from the power supply). But it sits flat on a custom frame I ordered in 2018, and it doesn’t have much that I don’t need (like lots of drive controllers, extra memory slots, audio, etc). And if you get a custom mining power supply (or breakout board) with only 6-pin connectors, you’re in good shape. 

Octominer has discontinued their 8-slot boards, and the boards may not support the latest GPUs on the market (much like the Ethos mining distro I used on it until this past week). I couldn’t get the board to boot with an AMD 5500XT GPU (Amazon, eBay) in the first slot, for example. So it’s chugging along with eight Sapphire Nitro+ RX580 8GB cards (Amazon, eBay), seven of which have been chugging for almost three years now.

While they still make custom boards, the only ways to get their products are either to find the rare used item on a marketplace, or to buy the one integrated rig they currently sell in quantities less than 10 (their x12 rig with everything but the GPUs, which runs almost $1,000 shipped to the US). 

Another company making custom boards is ONDA. You can usually find them on eBay or other marketplaces for a couple hundred dollars, with a range of slot support. I found a good deal on the B250 D8P-D4 recently, and since I wanted to aggregate a mess of old GPUs, it was an easy way to go. Continue reading

Fry’s Electronics is dead

How’s that for a spoiler of a headline?

After a day or two of rumors, a Bay Area TV news report last night confirmed that Fry’s Electronics, a mainstay of Silicon Valley electronics sourcing and more for almost 40 years, would cease operations today, February 24, 2021.

History of Silicon Valley Indeed: Is Fry’s Electronics Dying? | rsts11

Revisiting Fry’s Electronics a year later | rsts11

Fry’s confirmed this on their website early on Wednesday, February 24.

Many locals have seen the stores dry up, but there were still some goods they were useful for; I myself bought a few flash drives and SSDs for mining rigs and appliance builds earlier this months.

I’ve seen a few outlets declare that Fry’s fell to the pandemic, but people who’ve paid attention know this was not the core cause. The stores failed to adjust to competition, both local and online, over the past decade. Despite being the prime source of technology in the Bay Area for decades, they didn’t really keep up with the tech, internally or in the competitive environment.

The cascade through the consignment transition and then through the pandemic didn’t help, but there was a lot more going on long before COVID-19. A couple of friends joked that if they’d just sold toilet paper last year at this time, they would’ve been even more rich and weathered the storm, but like the failure to capitalize on the last two Black Friday sales opportunities, they missed the boat on perma-work-from-home.

Ironically, Micro Center, who are doing well in other parts of the country, failed in Silicon Valley around the turn of the century for similar reasons to Frys’s – failure to compete with what was at the time a very unique retail environment in the Bay Area. In today’s market, they might be able to make a comeback if they can find an affordable location (maybe the Fry’s building in Sunnyvale could be refitted with some windows and fewer ceiling leaks?).

For now, Silicon Valley denizens will have a choice of national websites like Amazon, Newegg, Zones, and the like; the local Best Buy stores; and Silicon Valley’s “other” local computer store, Central Computers (founded in Sunnyvale decades ago like Fry’s). For electric and electronic components, we still have options like Anchor Electronics (also a South Bay staple for around 40 years) and Excess Solutions (which has adjusted and expanded three times in the last 20 years or so).

For the past year or two, a trip to Fry’s for me has been an exercise in controlled disappointment, similar to vintage computer and car aficionados who might drive past the building where their favorite was invented, designed, built. Even more than before, I’d likely leave with nothing purchased, and the 64 empty registers would remain silent. Now they’ll be silent forever.

Money Pit: 3D Printing Part 3 – OctoPrint and OctoPi

This is one topic in a series of what I’m calling “money pit” projects. To be fair, it’ll be money and time pit topics, and nothing that you’d really have to get a second mortgage on your house to do… but things always get a bit out of hand.

This project is the 3D Printing project. Expect it to be an ongoing series, and I’m hoping to have some friends join the effort and offer their feedback as well. Links and prices are accurate as of November 2020, and may get updated in the future… but don’t count on it.

See the previous parts for the lead-in to this project. From here we’ll get into the enhancements and early printing.

Octopi / OctoPrint

The first day or two, I was running out to the garage to check on prints, and shuttling the included 8GB MicroSD card back and forth to load print files onto it. Since the only storage the printer has is this MicroSD card, I couldn’t add files during a print run, and it got somewhat tiring.

Enter OctoPrint and OctoPi.

OctoPrint is an open-source management program and web front-end for many/most 3D printers. It communicates with the printer over a USB cable. It can be installed on a Linux, Windows, or MacOS computer. However, you might not want to dedicate a full-sized computer to this task.

OctoPi is a Raspbian (Raspberry Pi Debian image) based distribution with Octoprint and the video streamer software included. you just need a Pi 3B or later board (and case and power supply) and an SD card with OctoPi installed. Older boards will work, but with the camera option or other intense plugins (like gcode viewers) you won’t like it according to the folks behind OctoPrint and OctoPi. Continue reading

Quick Take: Different ways of acquiring cryptocurrency

With this past month’s stock and crypto activity (various stocks heading for lunar orbit, Bitcoin breaking US$40,000, etc), a lot of people have started looking for ways to buy cryptocurrency (and stocks).

In a lot of forums, they’re being hit with misleading or outright false information. I’m here today to give you some pointers and context, and help you understand the cryptocurrency options available to you.

Nothing in this post is provided as investment advice or recommendations to conduct any financial transactions. There is risk in any of these processes, and you are on your own for that.

If you choose to use one of my referral links to sign up for one of the services mentioned, I’ll either get a share or two of a cheap stock, a few bucks worth of a stock, or sometimes a cash bonus. And I’ll appreciate your support. (Note that promos can change, and I may not come back and update these promos later; see the respective websites for active promotion terms)

  • SoFi Invest (fund an active account including crypto with $1000, and we’ll both get $50 worth of stock) (crypto available)
  • SoFi Money (fund an account with $500, and we both get $50 cash) (Virtual money management account, linkable to Invest and other services)
  • Robinhood (sign up and link a bank account, and we both get a free share of stock) (crypto available)
  • Webull (fun an account with $100 and get at least one stock share, maybe two) (crypto under tags like BTCUSD, ETHUSD, no DOGE)
  • Public (app-only, complete application and get a free amount of stock up to $16, must hold the value of the free stock in the account for 90 days) (no crypto, just stocks)

What is cryptocurrency? Do I get an actual physical bitcoin?

Cryptocurrency is a virtual currency that is created through a process called mining, and can be transferred and converted to other currencies (including “fiat” or what some would call “real” money). You don’t get a physical bitcoin (or ethereum or anything like that), and if you’ve seen one of those metal “Real Bitcoin Coin” items at a store, you’ve just seen a souvenir with little to no value and no association with any bitcoins.

Many cryptocurrencies have developed value, primarily through people giving them value and accepting them in transactions. This isn’t entirely unlike paper money – a piece of green and white paper alone doesn’t have any value, but when a nation accepts that that piece of paper is worth a certain amount and uses it in trade, it suddenly has value. 

The cryptocurrencies you’ve probably heard most about are Bitcoin, Ethereum, Litecoin, and (lately) Dogecoin. Bitcoin is the grandfather of crypto, and has been around since 2009. The others have come along since, to address perceived shortcomings or scaling issues with Bitcoin. Continue reading