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Sledding in January–on the Quadcore

Jan 30th, 2013
by Jeff Duntemann.
1 comment

Drive Sleds-500 Wide.jpg

Having had a certain amount of trouble with keeping multiple OS images on a single drive, I’ve been looking for a reliable way to pop a bootable SATA hard drive into my quadcore. The goal is to have one OS per drive. Drives smaller than 128GB are fairly cheap, and drives 80GB or smaller are dirt cheap. The challenge is purely mechanical, and I think I’ve got a line on it: the IStarUSA T-7M1 mobile rack. It can be had in a number of places, including Newegg and Amazon. About $35. It’s a full-size SATA drive holder that contains a removable sled to which the drive itself is bolted. The sleds themselves are available separately, at about $15-$20 each. They come in several different colors, including silver, blue, black, and red.

In use, the drive can be spun down while the machine is operating, or you can wait until you power down the machine as a whole before popping a drive and tucking a new one in. (That’s what I do. The Windows feature allowing hot-swapping of the drives slows down drive throughput, or so I’ve read.) I’m currently in the process of building a new Windows image on a Samsung 120GB SSD, and being able to swap sleds between my current image and the new image means I can take my time and do it right.

The only serious question about this is how many times the SATA leaf connectors on the backs of SATA drives can be cycled without compromising them. The SATA spec says 50 times, which does seem low but is probably conservative. The truth is that I don’t think of these as bigger thumb drives and won’t be yanking them anywhere near as often. Although I occasionally boot into Linux on this machine, I have a dedicated multiboot Linux box in my shop. I doubt I’ve gone into Linux here since last fall. Also, I have a case that contains two toaster-style SATA slots on top, and I’ve been using them for monthly backups since last summer without incident. A backchannel correspondent who swaps files using a BlacX case like mine says the danger is overrated. He’s had drives in and out of various docks well over 50 times and the drives still work perfectly. Even if I plug drives in monthly, I still get 5 years of backups without going beyond the spec. That’s more than good enough for me.

I’ve wanted to try an SSD for a couple of years. My reaction so far is that software comes in quite a bit faster from an SSD, especially the first time after boot-up. And with one less motor spinning, the machine is mildly but noticeably quieter. (I don’t have an outboard graphics card, and the case stays quite cool with only a single 120mm fan running.)

I’ve got a couple more evenings of configuration to do on the SSD image, but after I’ve been using it awhile I’ll post my impressions here. So far, the sledding has been fine.

Odd Lots

Jan 27th, 2013
by Jeff Duntemann.
2 comments
  • Cisco has sold their Linksys home-router business to Belkin. I’ve used Linksys gear for ten years now, know it well, and like it as much as I like any given brand. Getting it out of Cisco’s hands, where it had languished, is a good thing.
  • From a long-time Contra commenter I know only as bcl, here’s a very detailed technical review of USB chargers, which are not all the same based on equal output specs.
  • I’m trying to figure out what Ten Gentle Opportunities is “like” (a comp, I think they call it) and have asked those who’ve read the first draft. Someone recommended Piers Anthony’s Apprentice Adept series, which I’ve never seen nor heard of. Will begin looking for copies in local used bookstores.
  • IBM is perfecting an anti-microbial gel that they claim bacteria cannot develop resistance to. IBM. God love ’em–because the way things are going, we are gonna need this, and need it bad.
  • Then again, IBM also says that Steampunk will be the next big thing. Wait a minute. I thought Steampunk was the last big thing. (Thanks to Bill Cherepy for the link.)
  • I’m getting recommendations on surplus dealers I’ve never heard of from all corners. Here’s Twin Cities retailer Ax-Man Surplus, courtesy Lee Hart.
  • Lee also passed along the sad news that Glenwood Sales in Rochester NY, where I spent a great deal of money 1979-1984, is no more.
  • Pete Albrecht sent word of C&H Surplus in Duarte California. I used to have a print catalog from them and it vanished somewhere along the way, but the firm exists and sells mostly industrial surplus (motors, fans, compressors, etc.)
  • I stumbled on a nice free wallpaper site while looking for wood texture images, and there’s a lot of very good stuff there. That said, the single picture they have of a bichon is awful.
  • Bill Cherepy sent a link to a Steampunk workspace. Looks cool. As with most Steampunk keyboards, it looks uncomfortable. Love the tube amp, though it’s not really Steampunk. He needs a new (old?) mouse.
  • Sex with Neanderthals may have ram-charged our immune system and in other ways made us stronger. Genetic diversity is always good. And I’ll reiterate here that I have serious doubts about Homo Sap wiping out the Neanderthals. I think the Neanderthals wiped themselves out. Tribalism is fatal. Make sure your loyalties are diverse. Never throw poop at other tribes. Throw it at your own tribal leaders. If you can’t do that, well, you’re pwned.
  • Cats with jet packs…in 1584. Except I don’t think it’s really a jetpack. Given the bird’s unnecessary jet pack, I suspect that they are acting as living firebombs. The past sucked. I’m glad I’m here.
  • We’ve had a so-so winter so far; could use more water coming out of the sky. However, it’s about to get cold again. Perhaps I could use one of these. (Does anybody else flash on H. R. Giger looking at that damned thing?)
  • There are certified zombie shotgun shells. Haven’t seen Bigfoot flip-flops yet, though.

The Raspberry Pi Keyboard Stutter Problem

Jan 16th, 2013
by Jeff Duntemann.
9 comments

When I first cabled up and ran my Raspberry Pi board, it worked like a charm, first time. I was powering it with the Motorola Droid X2 charger that I had stolen from the kitchen desk upstairs. To keep peace in the valley, I went out and bought a cheap Micro-USB phone charger at Best Buy. It booted normally, but then, when I tried to log in, the keyboard began repeating characters. I’d type in “pi” and see a parade of extraneous i’s march in stately fashion across the display:

piiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

Needless to say, I couldn’t log in. Now, this didn’t happen every time, but probably half of all logins I attempted failed, with the same keyboard jitter. I tried two other USB keyboards I had on the shelf plus the known-good one attached to my GX620 USFF, and saw exactly the same behavior. It clearly wasn’t the keyboard itself. I’m using a Dell SK-8135 keyboard, which has a 2-port USB hub to which a Dell USB optical mouse is connected. This leaves one USB port on the RPi free, with any luck to use for thumb drive add-in storage. More on that once I figure it out.

Anyway. Some googling suggested a power supply shortfall. I got out my DVM and put the probes on test points 1 and 2. These are minuscule “doughnut” pads on the RPi circuit board. One is labeled TP1, the other TP2. Hunt around on the board for them; it’s not like there are a lot of square inches to search. TP1 is located next to the 220 uF filter cap at the Micro USB jack. TP2 is right next to the yellow RCA jack.

The RPi is designed to work at 5V. Anything much below that and things may start getting flaky. My reading across the test points was 4.72V. Aha! We now have a new phone charger for the kitchen desk–a cool one with a retractable cord–and I decided to dedicate the old one to the RPi. With the original Motorola Droid X2 charger in the wall, I measured 5.03V across the test points. Shazam! No more keyboard stutter.

I’m not sure it’s a question of the RPi drawing more current than the charger can provide. The Droid X2 charger that works is rated 850 ma. The no-name charger that provided only 4.72 volts is rated 2.1 A. Current sourcing ability is important, especially since different USB keyboards and mice draw different amounts of power–but accurate voltage is just as important. I’m guessing it’s sloppy voltage regulation in the cheap charger. If you’re getting keyboard weirdness, put your DVM on the test points and see what your charger is feeding the RPi.

What? You don’t have a DVM? No Pi for you!

The RPi Enthroned

Jan 12th, 2013
by Jeff Duntemann.
5 comments

I wonder how many Raspberry Pi boards will spend their entire working lives sitting cockeyed on a desk somewhere, at the center of a tangle of cables. That’s how mine was until a couple of days ago, when despite my cough I allowed myself a few minutes of quality screwdriver time to pull a proper RPi system together.workstation-500wide.jpg

It didn’t take much. Mostly what it took was a 2004-era Dell SX270 all-in-one system minus the SX270, which I now use as a bookend. The key component is a heavy stainless steel base with a VESA monitor mount and a bracket to hold the SX270 behind the monitor. The monitor itself is an unexceptional Dell 1704fp, with a native resolution of 1280 X 1024. (Those now sell for ~$50 on eBay.) That’s more than enough pixels for an RPi, although I tested it on one of my 21″ 1600 X 1200 behemoths and the little gadget did quite well overall.

BackView-500wide.jpg

I had already mounted the board on an aluminum plate, and all I had to do this time was drill two holes and bolt the plate to the SX270 mounting bracket. I may dress the wires a little to keep them from placing any torque on the connectors, but it works well as-is.

I was surprised to find out that the MagPi magazine is actually laid out on an RPi, using the open-source Scribus layout program. I installed Scribus via apt-get and poured some text into a layout. (I’ve been playing with Scribus for years.) Brisk! I guess we need to stop boggling at the capabilities of tiny little computers with all of two ICs on the mobo.

It certainly does a good job with FreePascal and Lazarus, which is why I went to all this trouble. They’ve now sold half a million of these things. At least a few of those people ought to be willing to buy a Lazarus tutorial for it. We’ll see.

Odd Lots

Jan 6th, 2013
by Jeff Duntemann.
6 comments

SATA as the New Thumb Drive

Dec 30th, 2012
by Jeff Duntemann.
No comments yet

I’m giving a webinar next month to a publishers’ group on the challenges of ebook piracy. So I’ve been taking notes and making sure that things haven’t changed much over the past year. One thing that surprised me a little came through on the backchannel (that is, email comments from people who for whatever reason don’t want to use Contra’s comment system) in June, concerning the resurgence of “sneakernet” piracy. I posted a link to a piece on TechDirt indicating that only 15% of music acquisition is done through all P2P technologies together. The bulk of piracy happens between friends, off the Net, where Big Media can’t see it.

What’s interesting came in through a backchannel correspondent whom I didn’t know and haven’t heard from since: Much or even most of the in-person file trading is done by treating entire high-capacity SATA hard drives as thumb drives. He saw my post on the Thermaltake BlacX case with a 2-drive SATA toaster dock built into the top panel. He has one too and wanted to see how common they were. He and his friends swap files by copying entire SATA drives onto blank drives via toaster docks, whether built into cases or standalone. I’ve had a 1-slot Ineo toaster dock since 2010, but it gathers dust now that I have the BlacX. I do my monthly off-site backups by copying everything onto a pair of 750 GB SATA drives using the docks on the top of the BlacX. I keep the backup drives in plastic flip-top cases made precisely for that purpose.

The correspondent (known only as “Don”) pointed out that there are now 2-slot standalone toaster docks that can clone drives from one to another without requiring any connection to a computer. Here’s one example (which even looks like a toaster!) and another. They’re evidently sector copiers and do not send files individually through a file system. Don and his friends get together and watch movies while popping SATA drives into and out of the docks.

I asked him if the drives ever fail by being plugged and unplugged so often. After all, internal SATA connectors are rated for only 50 matings. (ESATA connectors are rated for 5,000.) He hasn’t seen it happen so far, and if it happens, new drives are only $60-$80.

My experience with thumb drives goes the other way: I’ve had more USB ports fail on me than thumb drives. SATA drive connectors are really just etched PC board edge connectors, which can get scratched or dirty. (This is one reason I keep my SATA backup drives in plastic boxes.) I think with careful handling, drives should go a lot longer than 50 plug/unplug cycles.

Every time I think piracy can’t get any scarier, somebody comes along and says “Boo!” even louder. I keeping wondering what’s next. My hunch: Seedboxes, which still don’t entirely make sense to me. Once I figure them out, I’ll report back in this space.

Odd Lots

Dec 22nd, 2012
by Jeff Duntemann.
9 comments

Pi, Oh My

Dec 21st, 2012
by Jeff Duntemann.
2 comments

PiAssembled-500Wide.jpg

My longtime friend and collaborator Jim Strickland has had a Raspberry Pi board almost since the beginning, and he startled me by handing me one as a Christmas present. I was aware of it but hadn’t researched it deeply. Here’s a good place to start if you’re new to the concept.

Basically, it’s an ARM-6 board with HDMI and composite video output, two USB ports, and a standard RJ45 Ethernet connector. For disk it uses an SDHC card. There’s an I/O header for connecting to physical gadgets like relays and lights and things. There’s more than one OS available for it, but most people use the adaptation of Debian Wheezy called Raspbian.

I don’t like having circuit boards flopping around in mid-air, so I drilled and tapped two 4-40 holes in a husky 3/16″ aluminum plate and mounted the Pi on a pair of 3/8″ nylon standoffs.

Putting it together was a snap. I downloaded the Raspbian image file, wrote it out to a spare 8 GB SDHC card I had in the drawer with Image Writer for Windows, plugged the card into the card slot on the board, hooked up the cables, and turned it on.

Bootup isn’t snappy, and the first time in you have to set a few things like time zone, but in a couple of minutes I had Linux on my big-screen LED TV. The small black item connected to the USB port block in the photo above is the Bluetooth dongle for a Logitech wireless keyboard and mouse. This leaves me a port free for something else. Ethernet came to the device through a pair of Linksys Powerline bridges, which I’ve described here before.

I now have what Michael Abrash would call “Linux on my bedroom wall.”

This particular distro comes with Python and Scratch preinstalled, but Jim’s already gotten the ARM-6 port of FreePascal/Lazarus downloaded and running. That’s next on the list for me. I’ll wrestle with that another time, as it’s getting late here. I have a special purpose in mind for the gadget which I won’t spill just yet, since it may not be realistic. More as I learn it.

Odd Lots

Oct 26th, 2012
by Jeff Duntemann.
8 comments

Daywander

Oct 20th, 2012
by Jeff Duntemann.
5 comments

As I circle the concluding chapters of Ten Gentle Opportunies like a ravening vulture (do vultures raven? If so, what do ravens do?) I discovered this morning while reading email with an iced coffee in hand that Phil Foglio posted a rave of my novel The Cunning Blood, both on the Girl Genius Facebook page and his LiveJournal. (Thanks abundant to Alice Bentley for the tipoff.) Nothing motivates this particular vulture to abandon patience and kill something like a review of what has been (and still is–barely) my only completed full-length novel.

Now I have to kill this thing before it kills me.

(Note that there are other reasons for my slowdown the last couple of weeks, reasons that kept me from attending MileHiCon this weekend. Carol had to take a flight to Chicago on very short notice; more as things become clearer.)

Need. More. Coffee. I’m trying something peculiar here: The new-ish International Delights iced-coffee-in-a-milk-carton product. It’s outside the envelope for me because it’s got sugar in it, so I really bought it as a dessert. The mocha flavor is disappointing. It tastes almost exactly like the chocolate milk I used to drink at the Lane Tech lunchroom. Good if you like that sort of thing, but I want a brew that reminds me less of the clueless nerd I was in high school.

I also need to research the named ingredient “corn syrup.” Is that a new euphemism for HFCS? I know the corn industry is squirming so hard the worms in the gully are worried, but from earlier research I know that corn syrup is mostly glucose/destrose, which while still sugar isn’t as malevolent as HFCS seems to be.

Flying back from Hawaii I attempted to watch a rip of an episode from the original Outer Limits series on my Transformer Prime, and discovered something interesting: The throughput from the MicroSD card slot is insufficient to render the video on the Transformer’s display. It’s not exactly pixellation, but more like the sort of herringbone interference my ham radio signal used to put on broadcast TV. Regardless, it made watching the video impossible. Then, when I simply copied the .avi file to internal storage, it played perfectly. I know from previous experience that mp3 files play fine from MicroSD, and ebooks are not an problem at all.

Separate but still important issue: The Transformer Prime did not have the audio signal to drown out jet engine noise on our long flight. So even once I copied the episode to internal storage, I couldn’t make out the dialog half the time. That was the only video I brought, so more research is necessary. Video rips are peculiar things, and I certainly need better headphones.

I’ve broken a lot of light bulbs in my sixty years, but this recent casualty from the lamp over the stove was remarkable:

Broken Lightbulb.jpg

Secret? The touch of a rag wet with cold water. Yes, the bulb was off , but had been on all morning until five seconds previous. Duhhh. Light bulbs are not made of Pyrex.

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