QNX 4 filesystem

The QNX 4 filesystem uses the same on-disk structure as in the QNX 4 operating system.

This filesystem is implemented by the fs-qnx4.so shared object and is automatically loaded by the devb-* drivers when mounting a QNX 4 filesystem.

You can create a QNX disk partition by using the fdisk and dinit utilities.

This filesystem implements a robust design, using an extent-based, bitmap allocation scheme with fingerprint control structures to safeguard against data loss and to provide easy recovery. Features include:

For information about the implementation of the QNX 4 filesystem, see "QNX 4 disk structure" in the Backing Up and Recovering Data chapter in this guide.