Abstract
Car digital video recorders (DVRs) store realtime audio/video data at flash memory storage device. Car DVR should handle a large amount of high quality multimedia data with high reliability. However, current file systems are vulnerable to sudden-power-offs and flash memory errors. This paper proposes flash-aware cluster allocation techniques and a flash-aware journaling technique. The flash-aware cluster allocation techniques can reduce the probability of file system corruptions and file fragmentations. The flash-aware journaling technique can ensure the file system consistency without significant overheads. Experiments on a simulator and a real system showed that the proposed techniques can prevent file fragmentations and file system corruptions, and they can improve the write performance and lifetime of SD card significantly.
| Original language | English |
|---|---|
| Article number | 7150597 |
| Pages (from-to) | 222-229 |
| Number of pages | 8 |
| Journal | IEEE Transactions on Consumer Electronics |
| Volume | 61 |
| Issue number | 2 |
| DOIs | |
| State | Published - May 2015 |
Keywords
- Car digital video recorder
- Cluster allocation
- FAT file system
- Flash-aware journaling
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