Re: sda2 is corrupted (HOWTO NOT HELP)

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Am 06.07.2012 17:22, schrieb Jim:
> On 07/06/2012 11:09 AM, Reindl Harald wrote:
>>
>> Am 06.07.2012 17:01, schrieb Reindl Harald:
>>>
>>> Am 06.07.2012 16:11, schrieb Jim:
>>>> On 07/05/2012 01:30 PM, Reindl Harald wrote:
>>>>>> I have tried to use fedora and Gparted with no luck
>>>>> you should not play around before
>>>>> knowing what problem the drive has
>>>>>
>>>>> if it is a physical problem google for "ddrescue"
>>>>>
>>>>>> There are some important data files  I must save off of sda2
>>>>> what about BACKUPS?
>>>>>
>>>>> ff your data is important backups exists
>>>>> if your data is not important it does not matter
>>>>>
>>>>> why do people still need to learn it the hard way?
>>>>>
>>>> I run  dd if=/dev/sda2 of=/dev/sdb1  to copy, supposely a 26gb image to sdb1 but i do not see a image on  sdb1 .
>>>>
>>>> Confused ???
>>> no, just stupid because you do not read manuals nor know anything about
>>> basic-commands and that is why you destroyed /dev/sdb1 if there were
>>> data by overwrite the whole partition
>>>
>>> /dev/sdb1 is now a blockwise copy of /dev/sd1
>>>
>>> if you want a image you have to use "dd if=/deV7sda1 of=/path/filename.image"
>> well, i guess the reason why this happened was a combination
>> of plain stupid advise below without explain what it does in
>> a real dangerous way and blindly following any advise without
>> trying to understand what are you doing
>>
>> hopefully lesson learned -> BOTH of you!
>>
>> this is why i said "google for ddrescue" and NOT provide any
>> HIGH DANGEROUS command line
>>
>> -------- Original-Nachricht --------
>> Betreff: Re: sda2 is corrupted
>> Datum: Thu, 5 Jul 2012 20:15:14 +0200
>> Von: Heinz Diehl <htd@xxxxxxxxxx>
>> Antwort an: Community support for Fedora users <users@xxxxxxxxxxxxxxxxxxxxxxx>
>> Organisation: private site
>> An: users@xxxxxxxxxxxxxxxxxxxxxxx
>>
>> On 05.07.2012, Jim wrote:
>>
>>> There are some important data files  I must save off of sda2
>> Before you start any rescueing, take a full snapshot of the partition,
>> e.g. "dd if=/dev/sda2 of=/dev/on_an_external_disk"
>>
>>
>>
> that is exactly what I did but nothing shows up on /dev/sdb1 external drive after dd has completed

let me guess: /dev/sdb1 was mounted while you used "dd"
this does not work becasue you overwrite the whole FS and MBR
the OS does not rescan the drives after dd'ing

normally nobody would to this for a backup
ALWAYS of=/path/to(directory/filename.img

look here, this is the way to go for backups/mounting them
http://wiki.edseek.com/guide:mount_loopback



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