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

[Robin Bownes]

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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