>Furthermore, I would prefer not to use LVM nor any middle layer >between MD and the fs... Is this middle layer *very* usefull when I'm >sure my partitions layout will not evolve (e.g. only one enormous fs) >? Another feature of LVM is moving physical devices (PV). This makes it easier to grow your enormous fs because it allows you to remove disks. An example: Today 1 500GB RAID6 PV #1 A year from now, add another 1TB PV #2, no LVM advantage yet. A year later, you want to add another 1TB PV #3 but then you want to remove the first 500GB. With LVM you can copy PV #1 to PV#3 without affecting the filesystem and then remove PV #1. I haven't ever done this, just read about it. Also, maybe when md allows growing raid5/6 this will be handled by md. HTH - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html