Hi,

Detailed Case Information:
I have Windows 10 and BitLocker enabled.

HDD, Seagate 3TB, partitioned into 5 drives.

I did this mistake, I created a bootable USB by easy bcd and tested on host window during boot. Reached to the point where windows setup asks for disk selection, I clicked on the drive(setup says drive encrypted and can't continue) but didn't go further.

Then I boot nothing shows up.

Tried to connect 3tb hard to another PC to unlock drive but it's not accepting correct password and recovery key.

I made windows image before encryption. After restoring that 2nd and 4th drives are not accessible, 5th is formatted and 3rd drive data is intact with minor data loss.

I ran testdisk-7.0 and found no drive in the quick search. The log file is pasted below.
Fri Jul 1 23:56:11 2016
Command line: TestDisk

TestDisk 7.0, Data Recovery Utility, April 2015
Christophe GRENIER <grenier@cgsecurity.org>
CGSecurity - Data recovery: TestDisk PhotoRec
OS: Windows 8 (9200)
Compiler: GCC 4.8, Cygwin 1007.34
Compilation date: 2015-04-18T13:01:55
ext2fs lib: 1.42.8, ntfs lib: 10:0:0, reiserfs lib: 0.3.1-rc8, ewf lib: 20120504, curses lib: ncurses 5.9
disk_get_size_win32 IOCTL_DISK_GET_LENGTH_INFO(/dev/sda)=2199023255552
disk_get_size_win32 IOCTL_DISK_GET_LENGTH_INFO(/dev/sdb)=801567145984
disk_get_size_win32 IOCTL_DISK_GET_LENGTH_INFO(\\.\PhysicalDrive0)=2199023255552
disk_get_size_win32 IOCTL_DISK_GET_LENGTH_INFO(\\.\PhysicalDrive1)=801567145984
disk_get_size_win32 IOCTL_DISK_GET_LENGTH_INFO(\\.\C:)=536481890304
filewin32_getfilesize(\\.\D:) GetFileSize err Incorrect function.

filewin32_setfilepointer(\\.\D:) SetFilePointer err Incorrect function.

Warning: can't get size for \\.\D:
filewin32_getfilesize(\\.\E:) GetFileSize err Incorrect function.

filewin32_setfilepointer(\\.\E:) SetFilePointer err Incorrect function.

Warning: can't get size for \\.\E:
disk_get_size_win32 IOCTL_DISK_GET_LENGTH_INFO(\\.\F:)=1232570679296
disk_get_size_win32 IOCTL_DISK_GET_LENGTH_INFO(\\.\G:)=801564000256
disk_get_size_win32 IOCTL_DISK_GET_LENGTH_INFO(\\.\H:)=214748364800
disk_get_size_win32 IOCTL_DISK_GET_LENGTH_INFO(\\.\I:)=214746267648
Hard disk list
Disk /dev/sda - 2199 GB / 2048 GiB - CHS 267349 255 63, sector size=512
Disk /dev/sdb - 801 GB / 746 GiB - CHS 97451 255 63, sector size=512
Drive C: - 536 GB / 499 GiB - CHS 65223 255 63, sector size=512
Drive F: - 1232 GB / 1147 GiB - CHS 149851 255 63, sector size=512
Drive G: - 801 GB / 746 GiB - CHS 97451 255 63, sector size=512
Drive H: - 214 GB / 200 GiB - CHS 26108 255 63, sector size=512
Drive I: - 214 GB / 199 GiB - CHS 26108 255 63, sector size=512

Partition table type default to None
Drive F: - 1232 GB / 1147 GiB
Partition table type: Intel

Analyse Drive F: - 1232 GB / 1147 GiB - CHS 149851 255 63
Current partition structure:

Partition sector doesn't have the endmark 0xAA55

search_part()
Drive F: - 1232 GB / 1147 GiB - CHS 149851 255 63

Results

interface_write()

No partition found or selected for recovery
simulate write!

write_mbr_i386: starting...
Store new MBR code
write_all_log_i386: starting...
No extended partition

TestDisk exited normally.

Note:

How I can repair BitLocker/boot sector on 2nd drive?

Thanking you anticipation.