Flash filesystem partitions

A flash filesystem partition contains the POSIX-like flash filesystem, which uses a QNX-proprietary format to store the filesystem data on the flash devices. This format isn't compatible with either the Microsoft FFS2 or PCMCIA FTL specification.

The flash filesystem allows files and directories to be freely created and deleted. It recovers space from deleted files using a reclaim mechanism similar to garbage collection.

The flash filesystem supports all the standard POSIX utilities such as ls, mkdir, rm, ln, mv, and cp. There are also some QNX Neutrino utilities for managing the flash filesystem:

Erase, format, and mount flash partitions.
Compress files for flash filesystems.
Create flash filesystem image files.

The flash filesystem supports all the standard POSIX I/O functions such as open(), close(), read(), and write(). Special functions such as erasing are supported using the devctl() function.