Hello, I can now already answer some of my questions, thought others not: > In ext3 did each block group contain always 1 block? > If not, then how many? This information is in ext4_super_block.s_blocks_per_group > 2> I see that the number of groups inside a flexible group is > given by 2^sb.s_log_groups_per_flex but: > a> Every single group is a flexible group or some are and some now? I am still very much interesting in knowing this! Are all groups flexible groups when FLEX_BG feature is activated? I found this image for how things relate to one another without flex_bg: http://origin-ars.els-cdn.com/content/image/1-s2.0-S1742287612000357-gr1.jpg Does anyone know if there is a simular image with flex_bg??? thanks, Felipe Monteiro de Carvalho -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html