Hello, while testing ext4 with an external journal I found the following problem with longterm kernel 4.4.30: I could mount the filesystem without specifying the option data=.... It seems that it is then mounted with data=ordered and indeed this is what cat /proc/mounts shows. But I could not change any option afterwards with -o remount. It always said that data=ordered is not valid with an external journal. If I mount with explicitly stating data=writeback or data=journal remount works fine. So It seems that ext4 does forbid (at least in 4.4.30) data=ordered as an option but uses it implicitly as default mode even with an external journal. Regards, -- Wolfgang Walter Studentenwerk München Anstalt des öffentlichen Rechts -- 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