I've combined two partition formatted as NTFS for dual boot system with bootcamp. I did this while running windows using a special program to adjust partitions. but after a necessary restart according the program some texts rolled by. after that i lost access to the bootmanager and was unable to choice to boot to windows or Macintosh.
now I installed a fresh copy of mac os on the old partition where Windows was installed before. I figured out that the partition where my Mac installation was on still exists, but its name has changed to "Windows Recovery" somehow.
disk0s2 is for as far as I know still the partition where my files are on.
what I like to accomplish now is get access somehow to this partition and copy my files before completely format the whole disk and install a fresh installation of Mac OS.
Below is the output from the following commands.
diskutil unmount disk0s2
sudo dd if=/dev/disk0s2 bs=512 count=3 | hexdump -Cv
Below is the output from the command
diskutil info disk0s2 | grep -e Size -e Offset.
Partition Offset: 314597376 Bytes (76806 4096-Byte-Device-Blocks)
Disk Size: 351.0 GB (351027175424 Bytes) (exactly 685599952 512-Byte-Units)
Device Block Size: 4096 Bytes