Since all other partitions (EFI and the main OS X volume - assuming that only one main volume exists) are determined by the first block of the Recovery HD the math can be done. If you have found these blocks you can easily determine the start block of the Recovery HD as described in the linked answer. block: 0xFFs (probably a second allocation file) You can edit your partition tables or you could recover files from File System by hand with help of wxHe圎ditor. WxHe圎ditor can handle files up to 264 in size, that’s 16 billion gigabytes, which will probably be enough. block: 0xFFs (probably an allocation file)ġ1-13. Conduct File Listing, View File Content, Compare files in user created or downloaded Hash Databases, File Type Sorting by internal signatures, Create a. Some hex editors have annoying limits on file sizes, for instance. block: the string "HFSJ" in the first 16 BytesĨ. The Recovery HD partition has the following content: 0-1. This facilitates the search because the first ~390 GB (of the 500 GB disk) can be skipped since the Windows partition is created at the end of a disk. The asking person gave the following information: the Windows partition had a size of 100 GB.
![wxhexeditor table file wxhexeditor table file](https://windows-cdn.softpedia.com/screenshots/wxHexEditor_2.png)
The old data structures are still on the disk and can be found by searching for special strings and files' content. A FileTable is a specialized user table with a pre-defined schema that stores FILESTREAM data, as well as file and directory. Overwriting the original GUID partition table and replacing it by an MBR with Windows' Disk Management usually doesn't touch the content of your disk. SQL Server provides a special table of files, also referred to as a FileTable, for applications that require file and directory storage in the database, with Windows API compatibility and non-transactional access. Now open wxHe圎ditor and determine the boundaries of the "lost" Recovery HD. If you have a second boot device like an external disk or a thumb drive install a newer full OS X (not just a bootable installer thumb drive!). So the only practicable way there was an OS X install on the corrupted drive with the risk to overwrite the old "lost" partitions. You have to have a system drive with a full OS X to install additional apps like wxHe圎ditor to inspect the raw data on the drive. The solution there is a stopgap solution because the asking person neither had a thumb drive nor an external disk or a second Mac. The solution here is more or less the same as outlined in the answer to this question. But when I got my boundaries and created my partition, disk0s2 did not want to mount. In this procedure you have to find the right boundaries of your partition.
![wxhexeditor table file wxhexeditor table file](http://quantumvshelp.edp.co.uk/SysAd_TableFileAmend.gif)
I followed the strategy of Klanomath (see link) in order to recover my lost OSX (el Capitan) partition (MBR overwritten by bootcamp Windows).