[colug-432] testdisk is a lifesaver!

[Joshua Kramer]

Thanks for the suggestion, Richard.  gparted is what I used after restoring
my partition via testdisk.  It did everything automagically, including
resizing the file system.


On Mon, Jan 27, 2014 at 8:41 AM, Richard Hornsby
<richardjhornsby at gmail.com>wrote:

>
> On Jan 26, 2014, at 21:55 , Steve Roggenkamp <roggenkamps at acm.org> wrote:
>
> Thanks for this.  This sounds like a great program to have in your back
> pocket for situations like this.  Glad to hear it recovered your original
> partitions.
>
>
> You may take a look at gparted.
>
> http://gparted.org
>
> It is basically Partition Magic for linux.  It is graphical, which I'm
> usually not a fan of in Linux but it definitely helps here to be able see
> everything, and has been a solid tool for me to accomplishing the type of
> task you're trying.  There are also bootable gparted LiveCDs available.
>
>
>
>
> Steve
>
>
> On Sun, Jan 26, 2014 at 10:46 PM, Joshua Kramer <joskra42.list at gmail.com>wrote:
>
>> So I finally got around to putting an SSD in my laptop.  This meant that
>> I now have a 640GB hard disk that I could put into an external enclosure,
>> so I did so.
>>
>> But alas, the partitioning on this 640GB drive was inconvenient.  It had
>> a 500MB boot partition, a 550GB /home partition, and 85GB / partition.  I
>> wanted to be able to use most of the 650GB as one contiguous filesystem.
>> So, I deleted the third (85GB) partition and did the simple fdisk trick of
>> deleting the second partiton and then re-creating it with the same
>> beginning cylinder and a different ending cylinder.  I did this and wrote
>> the partition table to disk.
>>
>> Strangely, it wasn't automounting.  I then tried to mount /dev/sdb2 and
>> it gave me the dreaded "You must specify filesystem type" message.  Drat!
>> I tried to re-create the exact structure as before via fdisk, but that
>> didn't work either.  The problem was that the boundaries between partition
>> 1 and partition 2 were not on cylinder boundaries... so instead of
>> beginning on sector 26, it began on sector 25.5.
>>
>> Not sure how to get out of this, I did some Google-FU and found a program
>> called testdisk.  Supposedly, this would re-create your partition table for
>> you.  And indeed it did!  I deleted all of the partitions via fdisk.
>> Testdisk scanned the entire disk and re-created the original partition
>> table, and all three partitions magically re-appeared.
>>
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