Filesystem classes

QNX SDP8.0System ArchitectureDeveloperUser

The many available filesystems can be categorized as follows:

Image
A special filesystem that presents the modules in the image and is always present. Note that the procnto process automatically provides an image filesystem and a RAM filesystem. For more information, see Image filesystem and RAM “filesystem”.
Block
Traditional filesystems that operate on block devices like hard disks and DVD drives. This includes the Power-Safe filesystem, DOS, and Universal Disk Format filesystems.
Flash
Nonblock-oriented filesystems designed explicitly for the characteristics of flash memory devices. For NOR devices, use the FFS3 filesystem. For NAND devices, contact QNX Technical Support to obtain the ETFS filesystem.
Network
Filesystems that provide network file access to the filesystems on remote host computers (e.g., NFS filesystems).
Virtual
Filesystems in which the files or directories aren't necessarily tied directly to the underlying media, perhaps being manufactured on-demand. This includes the /proc filesystem; see Controlling processes via the /proc filesystem in the Processes chapter of the QNX OS Programmer's Guide.
Page updated: