Move partition ‘/dev/sda2’ to the right by 512.00 KiB and shrink it from 902.27 GiB to 892.50 GiB

Job: Check file system on partition ‘/dev/sda2’
Command: ntfsresize --no-progress-bar --info --force --verbose /dev/sda2
ntfsresize v2017.3.23 (libntfs-3g)
Device name : /dev/sda2
NTFS volume version: 3.1
Cluster size : 4096 bytes
Current volume size: 968801382912 bytes (968802 MB)
Current device size: 968801386496 bytes (968802 MB)
Checking for bad sectors ...
Checking filesystem consistency ...
Accounting clusters ...
Space in use : 263879 MB (27.2%)
Collecting resizing constraints ...
Estimating smallest shrunken size supported ...
File feature Last used at By inode
Multi-Record : 506835 MB 14997
$MFTMirr : 1 MB 1
Compressed : 283520 MB 669006
Sparse : 503055 MB 191500
Ordinary : 511110 MB 983139
You might resize at 263878410240 bytes or 263879 MB (freeing 704923 MB).
Please make a test run using both the -n and -s options before real resizing!
Check file system on partition ‘/dev/sda2’: Success

Job: Resize file system on partition ‘/dev/sda2’ to 1871708160 sectors
The file system on partition ‘/dev/sda2’ already has the requested length of 1871708160 sectors.
Resize file system on partition ‘/dev/sda2’ to 1871708160 sectors: Success

Job: Set geometry of partition ‘/dev/sda2’: Start sector: 205824, length: 1871708160
Set geometry of partition ‘/dev/sda2’: Start sector: 205824, length: 1871708160: Success

Job: Set geometry of partition ‘/dev/sda2’: Start sector: 206848, length: 1871708160
Set geometry of partition ‘/dev/sda2’: Start sector: 206848, length: 1871708160: Success

Job: Move the file system on partition ‘/dev/sda2’ to sector 206848
Copying 91392 blocks (958314577920 bytes) from 105906176 to 105906176, direction: left.

Copying 215 MiB/second, estimated time left: 01:07:09

Copying 214 MiB/second, estimated time left: 01:03:58

Copying 215 MiB/second, estimated time left: 01:00:13

Copying 216 MiB/second, estimated time left: 00:56:25

Copying 217 MiB/second, estimated time left: 00:52:33

Copying 218 MiB/second, estimated time left: 00:48:49

Copying 218 MiB/second, estimated time left: 00:45:20

Copying 219 MiB/second, estimated time left: 00:41:44

Copying 220 MiB/second, estimated time left: 00:38:04

Copying 219 MiB/second, estimated time left: 00:34:42

Copying 219 MiB/second, estimated time left: 00:31:15

Copying 220 MiB/second, estimated time left: 00:27:40

Copying 220 MiB/second, estimated time left: 00:24:08

Copying 221 MiB/second, estimated time left: 00:20:39

Copying 221 MiB/second, estimated time left: 00:17:12

Copying 221 MiB/second, estimated time left: 00:13:45

Copying 221 MiB/second, estimated time left: 00:10:18

Copying 221 MiB/second, estimated time left: 00:06:52

Copying 221 MiB/second, estimated time left: 00:03:26

Copying 221 MiB/second, estimated time left: 00:00:00

Copying 91392 blocks (958314577920 bytes) finished.

Closing device. This may take a few seconds.

Updating boot sector for NTFS file system on partition ‘/dev/sda2’.

Command: dd of=/dev/sda2 bs=1 count=4 seek=28
4+0 records in
4+0 records out
4 bytes copied, 5.2611e-05 s, 76.0 kB/s

Command: dd of=/dev/sda2 bs=1 count=4 seek=958314577436
4+0 records in
4+0 records out
4 bytes copied, 0.0447718 s, 0.1 kB/s
Move the file system on partition ‘/dev/sda2’ to sector 206848: Success

Job: Check file system on partition ‘/dev/sda2’
Command: ntfsresize --no-progress-bar --info --force --verbose /dev/sda2
ntfsresize v2017.3.23 (libntfs-3g)
NTFS signature is missing.
ERROR(22): Opening '/dev/sda2' as NTFS failed: Invalid argument
The device '/dev/sda2' doesn't have a valid NTFS.
Maybe you selected the wrong partition? Or the whole disk instead of a
partition (e.g. /dev/hda, not /dev/hda1)? This error might also occur
if the disk was incorrectly repartitioned (see the ntfsresize FAQ).

Command: ntfsresize --no-progress-bar --info --force --verbose /dev/sda2
ntfsresize v2017.3.23 (libntfs-3g)
NTFS signature is missing.
ERROR(22): Opening '/dev/sda2' as NTFS failed: Invalid argument
The device '/dev/sda2' doesn't have a valid NTFS.
Maybe you selected the wrong partition? Or the whole disk instead of a
partition (e.g. /dev/hda, not /dev/hda1)? This error might also occur
if the disk was incorrectly repartitioned (see the ntfsresize FAQ).
Check file system on partition ‘/dev/sda2’: Error

Checking partition ‘/dev/sda2’ after resize/move failed.
Move partition ‘/dev/sda2’ to the right by 512.00 KiB and shrink it from 902.27 GiB to 892.50 GiB: Error

----

And TestDisk says:

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

Disk /dev/sda - 1000 GB / 931 GiB - CHS 121601 255 63
     Partition                  Start        End    Size in sectors
 2 P HPFS - NTFS             12 223 20 116521  81 40 1871708160

Boot sector
Status: Bad

Backup boot sector
Status: Bad

Sectors are not identical.

A valid NTFS Boot sector must be present in order to access
any data; even if the partition is not bootable.