My 4TB WD My Book Duo started showing up as RAW and it said invalid filesystem or something in Windows 10. I believe it was formatted NTFS with one large partition. I ran the default option on TestDisk 7.0 to deep search the partitions and it says the following after several days of running:
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TestDisk 7.0, Data Recovery Utility, April 2015
Christophe GRENIER <grenier@cgsecurity.org>
http://www.cgsecurity.org
Disk /dev/sdl - 4000 GB / 3725 GiB - CHS 486397 255 63
The harddisk (4000 GB / 3725 GiB) seems too small! (< 8001 GB / 7451 GiB)
Check the harddisk size: HD jumpers settings, BIOS detection...
The following partition can't be recovered:
Partition Start End Size in sectors
> MS Data 7813973982 15627683772 7813709791
[ Continue ]
NTFS, blocksize=4096, 4000 GB / 3725 GiB
I tried to take one drive out and try with another sata connection and it never mounted, when I put it back in it said the RAID could only be rebuilt by erasing. Now I just have one drive in and RAID 1 says degraded. I think either drive will function the same.
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TestDisk 7.0, Data Recovery Utility, April 2015
Christophe GRENIER <grenier@cgsecurity.org>
http://www.cgsecurity.org
Disk /dev/sdl - 4000 GB / 3725 GiB - CHS 486397 255 63
Partition Start End Size in sectors
>D MS Data 264192 7813973982 7813709791
D MS Data 1571400 2069351 497952 [DVMUSB]
D MS Data 1784309 1849844 65536
D MS Data 1784311 1849846 65536
D MS Data 1849861 1915396 65536
D MS Data 1849863 1915398 65536
D Mac HFS 22750380 23889123 1138744
D Mac HFS 23889120 25027863 1138744
D Mac HFS 25027860 26166603 1138744
D Mac HFS 45010656 59484511 14473856
D Mac HFS 59484508 73958363 14473856
D Mac HFS 65153520 73964847 8811328
D Mac HFS 73958360 88432215 14473856
Structure: Ok. Use Up/Down Arrow keys to select partition.
Use Left/Right Arrow keys to CHANGE partition characteristics:
P=Primary D=Deleted
Keys A: add partition, L: load backup, T: change type, P: list files,
Enter: to continue
NTFS, blocksize=4096, 4000 GB / 3725 GiB
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TestDisk 7.0, Data Recovery Utility, April 2015
Christophe GRENIER <grenier@cgsecurity.org>
http://www.cgsecurity.org
MS Data 264192 7813973982 7813709791
Can't open filesystem. Filesystem seems damaged.
>[ Quit ]
Quit this section
Where do I go from here?
Is there a way to repair the file system?
Log attached too.
Thanks in advance for your advice!