SD cafd read only -

[Bob Goodwin - Zuni, Virginia, USA]

On 16/05/15 17:07, jd1008 wrote:
>
>
> On 05/16/2015 02:56 PM, Bob Goodwin - Zuni, Virginia, USA wrote:
>>
>>
>> On 16/05/15 16:44, jd1008 wrote:
>>>
>>>
>>> On 05/16/2015 02:28 PM, Bob Goodwin - Zuni, Virginia, USA wrote:
>>>>
>>>>>
>>>>> Also, have you ever copied to it, using dd,  an iso image
>>>>> of a bootable cd-rom or dvd-rom?
>>>> Yes, the F-21 XFCE Live spin, that's apparently what triggered this?
>>>>
>>> THAT's WHY it is read only.
>>>
>>> If you want to EVER mount it as rw, then you have to
>>> destroy what you have installed on it, by doing this as root:
>>>
>>> dd if=/dev/zero of=/dev/sdh bs=4M
>> .
>> [root at box10 /]# dd if=/dev/zero of=/dev/sdh bs=4M
>> dd: error writing ‘/dev/sdh’: No space left on device
>> 932+0 records in
>> 931+0 records out
>> 3906453504 bytes (3.9 GB) copied, 4.51131 s, 866 MB/s
>>
>>
>> That doesn't touch it either ...
>>
>>
> It did work!!!
> Now you must unmount it
> with the -f option,
> and run fdisk  or parted or gparted to partition it
> as you see fit.
> Then you must mkfs the specific partition you want to mount
> as read/write.
> After mkfs finishes, you can mount it.
>
>
.
[root at box10 /]# dd if=/dev/zero of=/dev/sdh bs=4M
dd: error writing ‘/dev/sdh’: No space left on device
932+0 records in
931+0 records out
3906453504 bytes (3.9 GB) copied, 4.52491 s, 863 MB/s

[root at box10 /]# umount -f /dev/sdh
umount: /dev/sdh: not mounted

It is not mounted, all I can mount is the 3.9GB partition.

I really believe this thing has failed.


>>
>>>
>>> When done, then you can use fdisk or gparted (or the text based parted)
>>> to partition the sd card.
>>> Once done, you can mount the partitions rw.
>>>
>>
>

-- 
Bob Goodwin - Zuni, Virginia, USA
http://www.qrz.com/db/W2BOD
box10  FEDORA-22b/64bit LINUX XFCE