[Novalug] Fwd: Re: Fwd: Re: How to Recover a Screwed Up Micro SD Card

greg pryzby greg@pryzby.org
Thu Aug 21 21:54:47 EDT 2014


Did you remove it and reinsert? Sometimes I find after making a change
(writing 0s) I need to reinsert to get the OS to recognize it.


On Thu, Aug 21, 2014 at 8:15 PM, Charles R. Head via Novalug <
novalug@firemountain.net> wrote:

> *Roger,*
>
> Since I can't create a partition on the SD card, I don't have anything to
> format.  I did try it, but I don't see a way.  If I'm missing something,
> please let me know.  However, I'm about ready to decide that we've already
> exerted more brain power than one measly SD card deserves.  I hate to give
> up on it (just based on basic principals, but mostly just due to innate
> stubbornness), but rationality should set in at some point.
>
>
> *Charlie Head*
>
>
> -------- Forwarded Message --------
> Subject:        Re: [Novalug] Fwd: Re: How to Recover a Screwed Up Micro
> SD Card
> Date:   Thu, 21 Aug 2014 19:27:29 -0400
> From:   Roger Broseus <RogerB@Bronord.com>
> To:     Charles Richard Head <CharlesRHead@Netscape.Net>
>
>
>
> Have you tried simply reformatting?
> --
> Roger Broseus
> www.bronord.com
>
>
> On August 21, 2014 4:52:59 PM EDT, Charles Richard Head via Novalug <
> novalug@firemountain.net> wrote:
>
>> *Guys,*
>>
>> I apologize if this message appears twice.  Immediately after I sent it
>>
>> the first time, I was notified my membership on the NoVALug list had
>> been suspended due to too many bounces.  I reenabled my membership, but
>>
>> don't know whether my last posting went out.  Thus, I'm sending it out
>> again below.
>>
>> Anyone else getting dis-enrolled from the new list?
>>
>> *Charlie Head*
>>
>>
>> -------- Forwarded Message --------
>> Subject:        Fwd: Re: [Novalug] How to Recover a Screwed Up Micro SD
>> Card
>> Date:   Thu, 21 Aug 2014 16:36:49 -0400
>> From:   Charles Richard Head <CharlesRHead@Netscape.Net>
>> To:     NoVALug List Server <NoVALug@FireMountain.net>
>>
>>
>>
>> *Guys,*
>>
>> Here is the second act:
>>
>> 1. I tried writing zeros over the partition table with dd, as
>>    suggested.  I still couldn't access the SD card using gparted.
>> 2. I then used dd to make an image file of a good 32 GB SD card, and
>>    used dd to write that image file to my screwed up SD card.  That
>>    didn't work either.  I got the following output:
>>
>> dad@headdom1l430 ~ $ sudo dd if=/home/Data/SDCard.img of=/dev/sdb
>> [sudo] password for dad:
>> dd: writing to ‘/dev/sdb’: Input/output error
>> 33161+0 records in
>> 33160+0 records out
>> 16977920 bytes (17 MB) copied, 9.49812 s, 1.8 MB/s
>> dad@headdom1l430 ~ $
>>
>> If anyone has more suggestions, I'm open to them.
>>
>> *Charlie Head*
>>
>> -------- Forwarded Message --------
>> Subject:        Re: [Novalug] How to Recover a Screwed Up Micro SD Card
>> Date:   Thu, 21 Aug 2014 14:42:03 -0400
>> From:   Jared Scott <jared@jaredscott.com>
>> To:     CharlesRHead@Netscape.Net <CharlesRHead@netscape.net>
>> CC:     NoVaLUG <novalug@calypso.tux.org>
>>
>>
>>
>> If you don't care about the data, then I think I'd try to write zeros
>> over the partition table and start again.
>>
>> dd if=/dev/zero of=/dev/sdXXX bs=1M count=10
>>
>>
>> http://www.noah.org/wiki/Dd_-_Destroyer_of_Disks#Erase_GPT_.
>> 28GUID_Partition_Table.29
>>
>>
>>
>>
>>
>> On Thu, Aug 21, 2014 at 2:31 PM, Charles R. Head
>> <CharlesRHead@netscape.net <mailto:CharlesRHead@netscape.net>> wrote:
>>
>>    *Guys,*
>>
>>   I have a 32 GB micro SD card that I've screwed up somehow. The first
>>    steps happened some time ago and I don't remember for sure what I
>>    did.  I believe I was doing something like trying to burn an OS for
>>    a Raspberry Pi to it.  In any case, by the time I finished, I could
>>    no longer write to the SD card.  I was busy, so I set it aside to
>>    work on later.
>>
>>    Now it's later.  When I tried to recover the SD card earlier this
>>    week, here is what I found and did:
>>
>>     1. I could not mount the card.
>>     2. I opened gparted and found that I could see the SD card (as
>>        /dev/sdb ), with one partition on it. However, there was a
>>        message indicating that there was a problem with the partition.
>>     3. I used gparted to delete the problematic partition and tried to
>>       create a new partition.  I was unable to create a new partition.
>>     4. I tried to write a new partition table to the SD card using
>>        gparted, but that didn't work either.
>>     5. At this point, I closed gparted (to have lunch or something, I
>>       don't remember).  When I restarted gparted, it can no longer see
>>        the SD card.
>>
>>   I don't believe there is anything mechanically or electrically wrong
>>    with this SD card.  I believe it is just configured wrong, or not
>>    configured at all.
>>
>>    Do any of you know how to recover such an SD card? I'd appreciate
>>    any suggestions you have.
>>
>>    *Charlie Head*
>>
>>
>>
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-- 
greg pryzby                              greg at pryzby dot org
http://www.linkedin.com/in/gpryzby

TWTR: gpryzby
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