Can't create partition

How to use TestDisk to recover lost partition
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rvyhmeister
Posts: 2
Joined: 01 May 2016, 08:39

Can't create partition

#1 Post by rvyhmeister » 01 May 2016, 08:44

I have a 2TB external disk that suddenly lost its partition information (and I'm invited to repartition/format from Windows 10). Running Testdisk "finds" some linux partitions (no idea why, since they were never there), but also sees this

NTFS at 243200/235/43
filesystem size 3907022848
sectors_per_cluster 8
mft_lcn 786432
mftmirr_lcn 2
clusters_per_mft_record -10
clusters_per_index_record 1
HPFS - NTFS 0 0 1 243200 235 43 3907022848
NTFS found using backup sector, blocksize=4096, 2000 GB / 1863 GiB
Partition not added.

So I try to add the partition manually

TestDisk 7.0, Data Recovery Utility, April 2015
Christophe GRENIER <grenier@cgsecurity.org>
http://www.cgsecurity.org

Drive P: - 2000 GB / 1863 GiB - CHS 243200 255 63

HPFS - NTFS 0 0 1 243199 254 63 3907008000

[Cylinder] [ Head ] [ Sector ] [Cylinder] [ Head ] [ Sector ]
[ Type ] >[ Done ]


when I click on Done, I get nothing (see below)... What is going on? What am I missing? Thanks in advance!

TestDisk 7.0, Data Recovery Utility, April 2015
Christophe GRENIER <grenier@cgsecurity.org>
http://www.cgsecurity.org

Drive P: - 2000 GB / 1863 GiB - CHS 243200 255 63
Partition Start End Size in sectors

Keys A: add partition, L: load backup, Enter: to continue

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cgrenier
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Re: Can't create partition

#2 Post by cgrenier » 01 May 2016, 19:30

No partition has been lost otherwise, P: will not be here.
Run TestDisk, select the PhysicalDrive corresponding to P:, Advanced, select the partition, Boot, RebuildBS, List.
If you can see your files, choose Write, confirm, Quit and restart your computer.

rvyhmeister
Posts: 2
Joined: 01 May 2016, 08:39

Re: Can't create partition

#3 Post by rvyhmeister » 08 May 2016, 08:36

On entering TestDisk I did this:

1. Select the drive
2. Select the [Intel] partition type ([none] is preselected).
3. Select [Advanced]

And now I see this (blank lines removed). The "drive" exists, but the partition is not there...

TestDisk 7.0, Data Recovery Utility, April 2015
Christophe GRENIER <grenier@cgsecurity.org>
http://www.cgsecurity.org

Drive E: - 2000 GB / 1863 GiB - CHS 243200 255 63

No partition available.

>[ Quit ]
Return to main menu


Here's the log from this session. Thanks in advance for any assistance.

Sun May 08 10:29:56 2016
Command line: TestDisk

TestDisk 7.0, Data Recovery Utility, April 2015
Christophe GRENIER <grenier@cgsecurity.org>
http://www.cgsecurity.org
OS: Windows 8 (9200)
Compiler: GCC 4.9, MinGW 3.11
Compilation date: Apr 18 2015 13:02:07
ext2fs lib: none, ntfs lib: 10:0:0, reiserfs lib: none, ewf lib: 20120504, curses lib: pdcurses build 3401
disk_get_size_win32 IOCTL_DISK_GET_LENGTH_INFO(\\.\PhysicalDrive0)=512110190592
disk_get_size_win32 IOCTL_DISK_GET_LENGTH_INFO(\\.\PhysicalDrive1)=2000398934016
disk_get_size_win32 IOCTL_DISK_GET_LENGTH_INFO(\\.\C:)=491536777216
disk_get_size_win32 IOCTL_DISK_GET_LENGTH_INFO(\\.\E:)=2000395698176
Hard disk list
Disk \\.\PhysicalDrive0 - 512 GB / 476 GiB - CHS 62260 255 63, sector size=512
Disk \\.\PhysicalDrive1 - 2000 GB / 1863 GiB - CHS 243201 255 63, sector size=512
Drive C: - 491 GB / 457 GiB - CHS 59759 255 63, sector size=512
Drive E: - 2000 GB / 1863 GiB - CHS 243200 255 63, sector size=512

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