Apparently something went wrong when I accidentally disconnected it from the USB port without using the "safely remove media" option in WIndows.
When i connect it, it shows as available but windows gives this message: " F:/ is not accessible. The disk structure is corrupted and unreadable"
data appears as RAW.
Using chkdsk does not work, its output is:
The type of the file system is NTFS.
Unable to determine volume version and state. CHKDSK aborted.
Therefore, I started Testdisk -> create new log and then selected the correct drive:
Next, i got the suggestion to select EFI GPT (which makes sense since the drive has only 1 partition), so I selected it>Disk /dev/sdb - 5000 GB / 4657 GiB - TOSHIBA External USB 3.0
I then selected Analyse and i get this screen:
Disk /dev/sdb - 5000 GB / 4657 GiB - CHS 608001 255 63
Current partition structure:
Partition Start End Size in sectors
No FAT, NTFS, ext2, JFS, Reiser, cramfs or XFS marker
1 P MS Reserved 34 262177 262144 [Microsoft reserved partition]
1 P MS Reserved 34 262177 262144 [Microsoft reserved partition]
2 P MS Data 264192 9767540735 9767276544 [Basic data partition]
after a quick search I got this screen:
when trying to list files, i got:
Disk /dev/sdb - 5000 GB / 4657 GiB - CHS 608001 255 63
Partition Start End Size in sectors
>P MS Data 264192 9767540735 9767276544
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, 5000 GB / 4657 GiB
I tried deeper search, after one day it did only 15% so I stopped it and this was the output:Can't open filesystem. Filesystem seems damaged.
I restarted testdisk and went EFI GPT -> Advanced, then selectedAnalyse cylinder 97039/608000: 15%
MS Data 264192 9767540735 9767276544
Unknown 177870678 9482188455810901 9482188277940224
Mac HFS 205506127 205507676 1550 [v^A^B\^A]
Mac HFS 205504581 205506130 1550 [v^A^B\^A]
Mac HFS 246861662 246863211 1550 [^A^B\^A]
Mac HFS 246860116 246861665 1550 [^A^B\^A]
check_FAT: Bad jump in FAT partition
Mac HFS 364277586 364279135 1550 [v^A^B\^A]
Mac HFS 364276040 364277589 1550 [v^A^B\^A]
Mac HFS 400721673 400723222 1550 [M-'^A^B\^A]
Mac HFS 400720127 400721676 1550 [M-'^A^B\^A]
check_FAT: Bad jump in FAT partition
Mac HFS 953260491 953262040 1550 [^A^B\^A]
Mac HFS 953258945 953260494 1550 [^A^B\^A]
Unknown 1390031186 16394449711441 16393059680256 [.M-?~^Cz{]
and with it selected rebuild BS, this is the output:2 P MS Data 264192 9767540735 9767276544 [Basic data partition]
I then tried repair MFT, the output was:
Disk /dev/sdb - 5000 GB / 4657 GiB - CHS 608001 255 63
Partition Start End Size in sectors
2 P MS Data 264192 9767540735 9767276544 [Basic data partition]
Boot sector
Status: OK
Backup boot sector
Status: OK
Sectors are identical.
A valid NTFS Boot sector must be present in order to access
any data; even if the partition is not bootable.
is there anything else i can do? thanks in advance.MFT and MFT mirror match perfectly.