On Friday July 20, seb@xxxxxx wrote: > > Could you tell me if such a mechanism exists in mdadm? > Or should I accept the "loss" of the 150 GB? When you give mdadm a collection of drives to turn into a RAID array, use bases the size of the array on the smallest device. You might want to make it a little smaller still in case you have to replace a device with a slightly smaller device (it happens). You can use "--size" to reduce the used space a little further if you like. NeilBrown - 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