How to recover deleted encrypted files under /home/$USER/.Private folder in /dev/sdb5 partition with ext4 Linux LVM file system?

[Qiubo Su (David Su)]

dear ubuntu users,

(more info. of my data recovery process for the incidentally deleted files)

with photorec i recovered about 20GB files, not all the 140GB, to the
external HD, not to the internal one.

when run "extundelete --restore-all /dev/mapper/ubuntu--vg-root" command, i
only recovered about 700M files and get a lot of console output of "Unable
to restore inode xxxxxx ...... : Space has been reallocated" and the final
console output is "Failed to restore inode xxxxxx to file
RECOVERED_FILES/xxxxxx: Some blocks were allocated".

the testdisk and ext3grep tools don't look as better as photorec and
extundelete tools in my case.

when the /home/$USER/.Private folder (in /dev/sdb5 partition with ext4
Linux LVM file system) was rm, i don't know i need to turn off the PC
immediately, while leave it running for about two days, run "apt-get
update" for a couple of times, but didn't create any folders or add any
files to this partition.

i made a image copy of the whole drive /dev/sdb with dd command before i
start to recover the deleted data.

the data recovering tools i have used so far are open source ones. it is
much appreciated if you can recommend me some better tools so can recover
all the deleted data.

i do keep copy of this data (made a couple of months ago), but i believe
there must be a way to recover the incidentally deleted data in this case.

thank you very much.

best regards,
qiubo david su

On Thu, Apr 2, 2015 at 7:36 AM, Dan Purgert <dan at djph.net> wrote:

> On Thu, 02 Apr 2015 07:21:16 +1300, Qiubo Su (David Su) wrote:
>
>
> > It is much appreciated if any experienced data recovery experts among
> > you can provide me some guidance to undelete all these data ASAP.
>
>
> With it being encrypted data, far as I know, your only option is "Grab
> your backup tapes, and restore."
>
>
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