On Fri, Jun 10, 2016 at 3:05 PM, Vladimir Gusiatnikov
<tundra1des...@gmail.com> wrote:
> Indeed I get the open-source/unpaid paradigm and sincerely appreciate the
> contributions. But, if a version breaks something, as I here seem to have
> material proof, perhaps there should at least be disclaimers and not an
> urging to use that specific version with detailed instructions on how to do
> so.
>
> So, where I got to with this particular SD card is as follows, which is
> beyond my knowledge of Linux, for which I apologize. I reformatted it in
> Windows in SD Formatter to FAT32, Windows can read and write and sees the
> 7.2 GB (the mystery of the extra space is perhaps simple—an 8 GB card with
> some bad blocks sold as 4 GB). I reformatted in every possible combination
> of options, then put a file on the SD card.
>
> lsblk on Ubuntu then reports 7.2 GB on /dev/sdb1.
>
> I can mount /dev/sdb1 on Ubuntu and read the file I wrote in Windows.
>
> When I run sudo cfdisk /dev/sdb, I see 780 MB of free space. (Before I did
> the Windows reformatting, I tried reformatting sdb in Linux, and I deleted
> the partitions that were previously formed by dd'ing the 7.9 image).
>
> When I run sudo cfdisk /dev/sdb1, I see 7.2 GB of free space. Yes, free
> space, despite being able to read, on the same machine at the same time, the
> file that's on the SD card.
>
> It seems to me that partition tables are corrupted, the portions that are
> seen by Linux/Ubuntu, and that they were corrupted by running
> grow_partition.sh on the Beaglebone earlier. And, that Ubuntu is confused by
> these tables and does not know how to recover.
Sounds like a crappy microSD card, as grow_partition calls' sfdisk:
sudo sfdisk --unit M ${DISK} <<-__EOF__
1,,L,*
__EOF__
So if ^ is enough to corrupt your microSD card's, throw them away, as
they useless...
Regards,
--
Robert Nelson
https://rcn-ee.com/
--
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