By Topic

Enhanced UBI layer for fast boot-up times of mobile consumer devices

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
Dongwook Kang ; ETRI (Electron. & Telecommun. Res. Inst.), Daejeon, South Korea

Due to its short mounting time, the Unsorted Block Image File System (UBIFS) allows mobile consumer devices to boot up faster than devices with other existing flash file systems. However, UBIFS requires a preceding UBI image attachment, which is not scalable. This due to the fact that two pages have to be read per erase block of the UBI image during mounting process, including an erase counter (EC) header and volume ID (VID) header. To lessen the effect of this problem, the UBI attachment process is modified. The EC header scan is delegated to a kernel thread after the booting process. And using software error-correcting code (ECC) instead of hardware ECC, latency from the VID header scan is lightened. As a result, although still not scalable, the mounting time is shortened considerably. In addition, the coefficient (rate of increase) becomes less significant. In experiments, the mounting time is under 1/8 of the normal time with a 100MB UBI Image. In addition, the rate of increase in the mounting time according to the UBI image size, i.e., the coefficient, is lessened from 8.9 to 0.5 milliseconds per byte.

Published in:

Consumer Electronics, IEEE Transactions on  (Volume:58 ,  Issue: 2 )