As much as I like the Raspberry Pi as the solution to all problems, it is cheaper to just buy hubs + USB SD Card writers . The SD card images that went out to press were written about ~15 at a time using such a setup.Gert van Loo wrote:The answer is straightforward: Use a Raspi!
I looked at SD-card gang programmers in November last year as the plan was to sell pre-programmed cards through the foundation shop.
I could not find them but any gang programmer costs thousands of pounds.
Solution: for 500 pounds you can buy ~20 Raspberry-Pis.
Now "all" you need to do is make a special "SD-card copy image":
So you boot first from an SD-card but put the swap space and everything you need on a USB stick.
Next you can plug in an empty-card and have a default image on that same USB stick to put on the card.
Run 20 of these in parallel.
You can also put the image on a central network resource but you need A LOT of network capacity to feed
20 boards all writing at maximum speed to an SD-card. So I think the USB system is the simplest.
Oh the irony!liz wrote:Remember the Leeds school masterclass that Eben took a few months back? (There's video on the blog.) We'd expected SD cards to be ready when we got there, but it turned out that the guy who was meant to be preparing them had just dragged and dropped in Windows, so none of them were partitioned correctly.
The installer for raspbmc does something close though. the initial image boots the pi, puts itself in memory then downloads and sets up raspbmc on the sdcard. Add a step to wait for you to swap the cards and press a key and it could do it couldn't it?mahjongg wrote:If you are going to use raspi's to write cards, then they must be connected to external USB card writers, as currently there are no distro's that run completely in RAM, and so can "unlock" to raspi's SD card slots, except the "emergency boot image", and I'm not sure that one is up to the task, besides, there is probably not enough RAM to contain the whole content of the image to be put on a card.
I tried this at work today in my lunchtime. Writing from the 2012_06_10_spindle_wheezy_public_alpha.img image on the SD card to a card writer on USB hub took a very long time - and I had to do it 4 times before it wrote properly. Cheap card writer...jog the desk and the card connection is lost.mahjongg wrote:If you are going to use raspi's to write cards, then they must be connected to external USB card writers
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