As per TypeID | Microsoft Docs , "OEM Partition" simply means that it has a partition type code of
0xA0. As you can see from the corresponding table entries in Wikipedia, these partition type codes are known to be used for OEM recovery partitions (that have FAT/FAT32 FS) and for hibernation cache for various proprietary technologies (likely no general-purpose FS).
It's impossible to say anything more without looking at its contents.
To view a partition's contents, you need to
Somehow guess its filesystem (and if it has a filesystem at all)
Usually, you can guess that by looking at the hexdump of the first sector of the partition. Most filesystems have some signature "magic bytes" there.
There are many tools that can do this, including BootICE, Acronis Disk Director, and
dd (and likely GParted) from System Rescue CD.
Mount that filesystem
This is completely specific to the OS and/or the tools. E.g.
- In Linux (including System Rescue CD), you use
- Acronis Disk Director can show contents without explicit mounting but you may need to change the partition type for it to be able to guess the filesystem.
- In Windows, you mount by assigning a letter to the partition in Disk Management. But Windows can only mount a few filesystem types that it knows of. And you need to first change the partition type to the value corresponding to that filesystem. This may break the system if the partition is in active use by some running software.