[ubuntu-za] Can't Boot after Windows 10 upgrade

[Robin Bownes]

Thanks to everyone who gave helpful advice.

Final feedback: -
I tried most of the suggestions, and quite a few other things beside. 
The best I managed, was to get into the folder system via TestDisk, and 
copy off the data (phew). At that point I decided it would probably be 
better to scrape it all down to bedrock, and start over. So, 
re-installed Windows 7 from Dell disks ... downloaded and installed days 
worth of updates, upgraded to Windows 10 (that all took about 3 days). 
Finally, I installed Ubuntu 14.04, did all the updates, and restored the 
data. (that took about 4 hours) Unfortunately, the Windows is needed - 
seldom, but periodically.

Well, that's that for that one. Thanks again.

On 02/11/2016 10:14 AM, Robin Bownes wrote:
> Thank you all for your suggestions. The past couple of days have been 
> a bit hectic, so I've not done any more with this. I'll try some of 
> these suggestions today, and get back to you all. Thanks again.
>
> Robin
>
> On 02/11/2016 08:12 AM, William Walter Kinghorn wrote:
>> Hi Robin,
>>
>> Boot with the Live DVD
>>
>> Then open each partition, and see what the contents are, is it NTFS, 
>> ext4, as well as the size of the partition
>>
>> >From that you should be able to see which is which
>>
>> If you are using Ubuntu Live DVD, you can use the GUI app called 
>> disks to do the above, I think it is on the live DVD
>>
>> William
>> ________________________________________
>> From: ubuntu-za-bounces at lists.ubuntu.com 
>> <mailto:ubuntu-za-bounces at lists.ubuntu.com> 
>> <ubuntu-za-bounces at lists.ubuntu.com> on behalf of wesley werner 
>> <wesley.werner at gmail.com>
>> Sent: 11 February 2016 06:58
>> To: Ubuntu South African Local Community
>> Subject: Re: [ubuntu-za] Can't Boot after Windows 10 upgrade
>>
>> On 09/02/2016 14:18, Robin Bownes wrote:
>> > On 9 Feb 2016 13:08, "Robin Bownes"
>> > <<mailto:robin at bownes.co.za>robin at bownes.co.za> wrote:
>> > >
>> > > Apparently, from some reading I've done - which unfortunately didn't
>> > give me anything I felt confident trying to do - the Windows upgrade
>> > overwrites part of the partition table, but not the contents of the
>> > partition. That is why the previously Linux partition now shows up as
>> > "unknown".
>> > >
>> > >
>> > So the partition is still mountable from a live disk then?
>>
>> Hello Robin
>>
>> That is possible assuming the data is still intact. The trick is finding
>> out which partition contained Ubuntu:
>>
>>
>> Model: ATA WDC WD3200BEKT-7 (scsi)
>> Disk /dev/sda: 320GB
>> Number Start End Size Type File system Flags
>> 1 1049kB 5692MB 5691MB primary ntfs diag
>> 2 5692MB 65.3GB 59.6GB primary
>> 3 65.3GB 65.8GB 472MB primary ntfs boot, diag
>> 4 65.8GB 320GB 254GB extended
>> 5 316GB 320GB 4082MB logical linux-swap(v1)
>>
>>
>> Partitions #1 and #3 seem to be for windows recovery, #2 windows itself,
>> and #5 the Ubuntu swap.
>>
>> The discrepancy I notice is that partition #4 reserves 254GB (extended
>> partitions are not real partitions but a grouping of other partitions),
>> of which only 4GB is allocated to the swap. There is 250GB not allocated.
>>
>> I dare to say there used to be a partition #6 that was 250GB and
>> contained Ubuntu, but why it would have been removed is beyond me, and
>> why the swap was left intact even more so!
>>
>> Since that space is unallocated it will (to your luck) not be written
>> into, the data might still exist. As a last resort you can use fdisk or
>> gparted to re-create partition #6 using the unallocated space, and try
>> mount it. Assuming there was a #6 and it used the rest of the
>> unallocated space, and windows did not resize it into itself in some 
>> part.
>>
>> There are various other partition recovery methods mentioned online and
>> you might try those before re-creating the partition as I mentioned
>> above, but recovery is at the very least a complex task.
>>
>> Wesley
>>
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