Linux Partition after Win 10 upgrade

[christian-pietzsch]

I have ben searching for a lot of topics regarding my problem but most are esier fixable than mine.
After Win 10 Upgrade the dual boot was broken. Using the Live CD using gparted I noticed that the Linux partition was shown as unallocated. With testdisk i was able to recover it to ext4 and it shows that the partition is filled (so my data should still be there)

sudo parted /dev/sda print
Model: ATA WDC WD5000AAKS-0 (scsi)
Disk /dev/sda: 500GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:

Number Start End Size Type File system Flags
1 1049kB 209GB 209GB primary ntfs boot
2 209GB 210GB 472MB primary ntfs
3 210GB 498GB 288GB primary ext2
4 498GB 500GB 2146MB extended lba
5 498GB 500GB 2144MB logical linux-swap(v1)

But if I mount it, there is almost nothing (just an lost&found folder). Testdisk also doesn't show anything more if I do quick search.
I deep searche there is another partition found but I allways the error: structure:bad
I used intel partition table structure. Might this be the problem?

[oldfred]

Intel is BIOS boot with MBR(msdos) partitions.
Only if you have gpt whether UEFI or BIOS boot would you use the EFI/gpt option.

You are showing partition as ext2?

Windows major updates often do not write the Linux partition(s) back into partition table when MBR(msdos).
Many have been able to restore with testdisk or parted rescue, but better to backup partition table first. And then data is normally correct. If data is correct then reinstall grub and it works.

A few have issues.
Did you change size of Ubuntu partition more than once, so testdisk found multiple versions of partition table. It finds all the old versions also.
Was Linux partition logical or inside extended partition originally? That often is the case, but it looks like your restore partition is a primary partition.

sudo parted /dev/sda unit s print
http://askubuntu.com/questions/654386/windows-10-upgrade-lead-into-grub-rescue/655080#655080
Windows 7 to Windows 10 MBR partition missing
http://ubuntuforums.org/showthread.php?t=2288988
http://ubuntuforums.org/showthread.php?t=2290190
http://ubuntuforums.org/showthread.php?t=2292545
Use parted rescue to restore missing partition details in post #22
http://ubuntuforums.org/showthread.php?t=1775331
http://www.gnu.org/software/parted/manual/html_node/rescue.html
http://gparted.sourceforge.net/faq.php/#faq-22
Parted rescue seems easier than testdisk
http://askubuntu.com/questions/665445/upgraded-to-windows-10-on-dual-boot-and-cant-boot-to-ubuntu-partition/665462

[christian-pietzsch]

thank you for your answer. Ill try it this evening
For the moment I used Photorec to get a lot of my data out of the partition (most files seem fine). But there are many duplicates and so an so it would be still pretty good if I could restore the partition.

[oldfred]

If a deeper search with testdisk works that may show files with names. Of course backups before a major upgrade are always the best choice.

When I used photorec, it also found the same file I edited and saved many times as it also found the deleted copies. It took forever to sort to find the same file and then compare all the versions to see which may be the newest.

[christian-pietzsch]

The problem is that Testdisk didn't find any files even using deeper search. so I think the chances of repairing aren't that high.
I couldn't imagine that Windows would muddle with partitions that don't belong to it. But ones more MS proved me wrong -.-

[christian-pietzsch]

sudo parted /dev/sda unit s print
Model: ATA WDC WD5000AAKS-0 (scsi)
Disk /dev/sda: 976773168s
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:

Number Start End Size Type File system Flags
1 2048s 408680447s 408678400s primary ntfs boot
2 408680448s 409602047s 921600s primary ntfs
3 409602048s 972580863s 562978816s primary ext2
4 972580864s 976773119s 4192256s extended lba
5 972582912s 976771071s 4188160s logical linux-swap(v1)

lubuntu@lubuntu:~$ sudo parted
GNU Parted 3.2
Using /dev/sda
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) unit s
(parted) rescue
Start? 409602048
End? 972580862
(parted)
(parted) rescue
Start? 409602047
End? 972580862
(parted)
(parted) rescue
Start? 409602049
End? 972580862
(parted)
(parted) rescue
Start? 409602049
End? 972580864
(parted)


I can't get parted rescue to work. If I understood correctly it should find the partition if insert start and endnumbers smaller than what is shown in the partition table. But it doesn't seem to find any. As you can see I also tried a few other combinations.
Do I do somehing wrong or are there other problems.

Thanks in advance for your patience.

edit: what I also don't understand is why parted shows it as an ext 2 (which I'm pretty sure isn't true) and in gparted it is shwon as ext4

[oldfred]

It is already showing the partition, so parted rescue cannot restore another into that space.

Not sure then if repairs to partition like fsck or others now may help or just create more issues.

[christian-pietzsch]

fsck says everything is fine:

sudo fsck.ext4 /dev/sda3
e2fsck 1.42.12 (29-Aug-2014)
Linux: sauber, 793404/17596416 Dateien, 18484801/70372352 Blöcke


edit: okay forcing recheck now

[christian-pietzsch]

getting multiply-claimed inodes.

Running additional passes to resolve blocks claimed by more than one inode...
Pass 1B: Rescanning for multiply-claimed blocks
Multiply-claimed block(s) in inode 4195819: 9377 9377 9377 9377 9377 9377 9377 9377 9377 9377 9377 9377 9377 9377
Multiply-claimed block(s) in inode 4196645: 9380 9380 9380 9380 9380 9380 9380 9380 9380 9380 9380 9380 9380 9380
Multiply-claimed block(s) in inode 4197513: 9381 9381 9381 9381 9381 9381 9381 9381 9381 9381 9381 9381 9381 9381
Multiply-claimed block(s) in inode 4197540: 9382 9382 9382 9382 9382 9382 9382 9382 9382 9382 9382 9382 9382 9382
Multiply-claimed block(s) in inode 4197563: 9383 9383 9383 9383 9383 9383 9383 9383 9383 9383 9383 9383 9383 9383
Multiply-claimed block(s) in inode 4197644: 9386 9386 9386 9386 9386 9386 9386 9386 9386 9386 9386 9386 9386 9386
Multiply-claimed block(s) in inode 4197669: 9387 9387 9387 9387 9387 9387 9387 9387 9387 9387 9387 9387 9387 9387
Multiply-claimed block(s) in inode 4197745: 9388 9388 9388 9388 9388 9388 9388 9388 9388 9388 9388 9388 9388 9388
Multiply-claimed block(s) in inode 4197828: 9390 9390 9390 9390 9390 9390 9390 9390 9390 9390 9390 9390 9390 9390
Multiply-claimed block(s) in inode 5377266: 9391 9391 9391 9391 9391 9391 9391 9391 9391 9391 9391 9391 9391 9391
Multiply-claimed block(s) in inode 5377268: 9392 9392 9392 9392 9392 9392 9392 9392 9392 9392 9392 9392 9392 9392
Multiply-claimed block(s) in inode 5377316: 9393 9393 9393 9393 9393 9393 9393 9393 9393 9393 9393 9393 9393 9393
Multiply-claimed block(s) in inode 5377334: 9394 9394 9394 9394 9394 9394 9394 9394 9394 9394 9394 9394 9394 9394
Multiply-claimed block(s) in inode 5377346: 9396 9396 9396 9396 9396 9396 9396 9396 9396 9396 9396 9396 9396 9396
Multiply-claimed block(s) in inode 5377366: 9397 9397 9397 9397 9397 9397 9397 9397 9397 9397 9397 9397 9397 9397
Multiply-claimed block(s) in inode 5768247: 9398 9398 9398 9398 9398 9398 9398 9398 9398 9398 9398 9398 9398 9398
Pass 1C: Scanning directories for inodes with multiply-claimed blocks
Pass 1D: Reconciling multiply-claimed blocks
(There are 16 inodes containing multiply-claimed blocks.)

File /lost+found/#4199281/4c08b4c70c5be7cb6c402efa92fdb6ee.png (inode #4195819, mod time Thu Aug 28 03:52:48 1969)
has 14 multiply-claimed block(s), shared with 0 file(s):
Clone multiply-claimed blocks<y>?


I had that when I used it early and told it to fix it. Might have done more bad than good as you mentioned.