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Filesystem Creation
RedPandaOS uses a raw disk image for booting in qemu. The raw disk image consists of an MBR with a single FAT32 partition.
The first portion is the MBR, which stores the first stage Bootloader as well as partition information. There is a single FAT32 partition, listed in the MBR partition table. The FAT32 partition then contains the second stage Bootloader in the FAT reserved sectors.
The FAT32 file system includes a boot/kernel.bin file, which is what stores the main code for the 32 bit kernel. Typically there will also be a boot/symbols.bin file, which is generated at runtime by the RedPandaOS project.
Finally, any additional files or directories added to the project/disk directory will be added to the FAT32 file system. This can include /etc, /home and other files. See the function ExploreDirectory in FAT32Writer.cs for more information on how these additional files and directories are added.
The resulting file is a bootable raw disk image for qemu, which can be booted using the format=raw option in qemu.