[PLUG] SD cards always mount read-only

Patrick J. Timlick p.j.timlick at ieee.org
Tue Oct 11 03:17:22 UTC 2011


sudo fdisk -l
Shows formatted disks, even those unmounted, including sdcards, in my
experience.  No SD cards on my system, but here is example output:


> $ sudo fdisk -l
>
> [sudo] password for pat:
>
>
>> Disk /dev/sda: 400.1 GB, 400088457216 bytes
>
> 255 heads, 63 sectors/track, 48641 cylinders
>
> Units = cylinders of 16065 * 512 = 8225280 bytes
>
> Sector size (logical/physical): 512 bytes / 512 bytes
>
> I/O size (minimum/optimal): 512 bytes / 512 bytes
>
> Disk identifier: 0x12141214
>
>
>>    Device Boot      Start         End      Blocks   Id  System
>
> /dev/sda1   *           1       47896   384724588+  83  Linux
>
> /dev/sda2           47897       48641     5984182    5  Extended
>
> /dev/sda5           47897       48641     5984181   82  Linux swap /
>> Solaris
>
>
Good Luck -- Pat

On Mon, Oct 10, 2011 at 7:13 PM, John Jason Jordan <johnxj at comcast.net>wrote:

> On Mon, 10 Oct 2011 16:47:36 -0700
> Fernando Freire <freire14 at up.edu> dijo:
>
> >This may seem silly to suggest, but have you could attempt to throw up
> >a quick Windows VM and see if you have RW access to the drive then.
> >May not be optimal, but at least it'll get you support from SanDisk?
>
> Oh, I already have Windows 2000 and Windows XP installed in Virtualbox.
> And I already tried them. They both saw the device as read-only. But
> that doesn't prove much, since the virtual machines depend on Virtualbox
> to tell them what is on the drives, and Virtualbox just reports what
> Linux tells it. Or maybe they see the drive directly, but whatever they
> see still can't be more than what the host OS (Linux) sees. In any
> event, I tried to copy a file to the card while in Windows, and Windows
> said it could not because the drive was read-only. I didn't try
> formatting with Windows.
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-- 
p.j.timlick at ieee.org
www.timlick.com
503-476-3119
10990 NE Paren Springs Rd.
Dundee OR 97115



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