Issue: Logfile shows jffs2: Too few erase blocks
Thu Aug 16 07:51:23 2018 user.notice kernel: [ 12.026759] mount_root: jffs2 not ready yet, using temporary tmpfs overlay Thu Aug 16 07:51:49 2018 kern.err kernel: [ 49.266881] jffs2: Too few erase blocks (3)
Further symptoms: Settings can not be saved / changed settings are lost after reboot
Root cause: Too large firmware. Not enough free space for jffs2 partition (required: >=5 erase blocks, available: only 3).
Source: fs/jffs2/fs.c
Solution: No solution except a smaller firmware image. See → low flash for solutions.