[Macchiato] SD problems

[Steve McIntyre]

On Fri, Jun 16, 2017 at 10:46:23AM +0200, Marcin Wojtas wrote:
>>>
>>> I got to know about 4096 first partition's offset at:
>>> http://wiki.macchiatobin.net/tiki-index.php
>>> Actually until Wednesday I wasn't aware, that SolidRun maintained
>>> their own wiki.
>>
>> The boot ROM simply probes a number of offsets, and I never put the
>> image anywhere except at the start of the second sector, which works
>> reliably when I use either of the two working uSD cards I have. So I
>> would be very surprised if putting the image elsewhere would solve
>> Steve's problem.
>
>I didn't come up this on my own, just followed:
>http://wiki.macchiatobin.net/tiki-index.php?page=Setup+alternative+boot+sources
>I would be also surprised that it helped for the cards in question,
>however it's not time consuming to give it a try and follow the howto.
>In my case, at the first attempt I didn't use the 4096 offset and the
>bootrom couldn't handle it. With the same card and setting everything
>as on the wiki site, it just started working.

Right. I've tried a few more different SD cards, again with no
success. Marcin, *exactly* what layout are you using please? I've
tried now:

 1. Already-formatted SD card, with partition table in sector 0
    pointing to partition 1 further up the storage (sector 2048 is a
    common start point). Start writing the flash image at sector 1,
    using dd if=... of=... bs=512 skip=1

 2. Create a new DOS partition table, with partition 1 at sector 8
    (i.e. byte offset 4096). Start writing the flash image at sector 1,
    using dd if=... of=... bs=512 skip=1

Sorry to be pedantic, but I've not seen any difference in behaviour at
all here and I'd like to recreate exactly what you've been doing to
rule out any silly mistakes.

-- 
Steve McIntyre, Cambridge, UK.                                steve at einval.com
There's no sensation to compare with this
Suspended animation, A state of bliss