QNX Software Systems


Managing Flash Memory in Car Infotainment Systems

Flash chips embedded in vehicle navigation systems must survive many years of constant use. Users never expect to lose data, experience long boot times, or endure long data-recovery times. This, however, puts considerable demands on the file system technology that controls the data on these flash chips.

To complicate matters, automotive embedded designs must keep costs to an absolute minimum. The bill of materials typically has no room for hardware that can manage power fluctuations or uncontrolled shutdowns, either of which can result in flash memory corruption and subsequent loss of service. Consequently, flash file system technology cannot simply provide high read/write throughput; it must also be self-healing and fully accessible within milliseconds after boot.

The good news is it is possible to build a flash file system that provides high throughput as well as high reliability and fast start times. Discover how in Managing Flash Memory in Car Infotainment Systems, a new technical white paper that explores:

  • the benefits of a pure transaction-based file system model
  • how to prolong flash life through read-degradation monitoring, dynamic and static wear-leveling
  • techniques to avoid file fragmentation

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