On Wed, Apr 4, 2012 at 5:33 PM, Daniel Drake <[email protected]> wrote:
> Hi, > > I'm planning on moving the XO-1 back to JFFS2 for 12.1.0 - and likely > for the future too. > > The reasons being: > > 1. UBIFS is considerably less space-efficient than JFFS2. > > http://www.linux-mtd.infradead.org/faq/ubifs.html#L_jffs2_space > > We needed the disk space already, and we're battling constant growth > of the Fedora platform. Deployments will also appreciate not losing > 50mb of space which can be used for content, user data, etc. > > > 2. UBIFS is less robust in the face of bad blocks. > > At image creation time, UBIFS allocates a number of blocks that are > used when other blocks go bad. When that allocation is exceeded (i.e. > when blocks go bad), UBI goes read-only and there is no simple > recovery except another reflash. > JFFS2 is more robust here. > > > The ubifs_image module will remain in olpc-os-builder for those who > wish to try it, but the OLPC configs and images will switch back to > JFFS2 (which is what we've used in all stable releases til now). > > Comments/objections? > >From my narrow perspective, more space and robustness are more important than a boost in re-flash speed or boot speed. So +1 from here. > > Thanks, > Daniel > _______________________________________________ > Devel mailing list > [email protected] > http://lists.laptop.org/listinfo/devel >
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