How to recover partitions on ADATA XM11 in ASUS UX31A?

How to use TestDisk to recover lost partition
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Pander
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Joined: 31 Oct 2017, 18:05

How to recover partitions on ADATA XM11 in ASUS UX31A?

#1 Post by Pander » 31 Oct 2017, 20:41

What is the best way to recover the partition table from an ADATA XM11 256 MB SSD in ASUS ZenBook UX31A with Ubuntu?

https://image.pushauction.com/0/0/f392f ... d9a832.jpg

https://www.asus.com/us/Laptops/ASUS-Ze ... fications/

It had three partitions, ext4 (/), swap and ext4 (/home) which were deleted with gparted. Then the system stopped running. The disk has also out-of-the-box Ubuntu encryption on the home partition and there was nothing left from the original Windows 8 with which it was shipped from the factory. However, the system has UEFI/EFI? probably an LVM and that encrpytion too. Which doesn't make it easier.

In an older version of Ubuntu, I needed to enter a passphrase in the boot process in a screen looking like this: http://www.linuxbsdos.com/wp-content/up ... 00x311.png

In order to avoid any risk, I made copies of the disk using lubuntu live image 17.10 to external hard disks (non-SSD) that were connected via USB:
1)

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dd bs=64K conv=noerror,sync status=progress if=/dev/sda of=/dev/sdb
2)

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ddrescue -f -d -r3 /dev/sda /dev/sdb /root/blah.log
3)

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ddrescue -f -d -r3 --reverse /dev/sda /dev/sdb /root/blahr.log
All encountered some bad sectors, hence the copy with reverse too. All the disks have a larger storage capacity but have been blanked before with dd if=/dev/null of=/dev/sdb

I am a bit hesitant to run TestDisk on the original disk itself, at the moment. Therefore, I am running TestDisk on the disk with the copy that was made with ddrescue --reverse ( 3) ) and am running some deep analysis at the moment. The two NTFS partitions on which I am doing deep analysis are 20 GB in size and don't look much like my home partition which I am trying to find. So, I have some questions.

a) Is this approach via copies even possible?
b) If yes, what is the best approach if I would work with a copy? (At the moment I use 3) ) Would it be much easier to run TestDisk on the original disk?
c) Which analysis should I start? "Intel/PC" or "EFI GPT partition map (Mac i386, some x86_64...)"?

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Re: How to recover partitions on ADATA XM11 in ASUS UX31A?

#2 Post by cgrenier » 01 Nov 2017, 08:10

Working on a copy created with ddrescue is ok.
Try EFI GPT partition table, it's the most common nowadays.

Pander
Posts: 2
Joined: 31 Oct 2017, 18:05

Re: How to recover partitions on ADATA XM11 in ASUS UX31A?

#3 Post by Pander » 20 Nov 2017, 13:51

Unfortunately no result. Can anyone recommend some commercial services for partition recovery? Preferably in the Netherlands. Thanks.

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