Actually I kind of fixed it last night. I found a posting by someone on an older Ubuntu release with a similar problem, and he resolved it by making loopback devices pointing at his constituent drives, and then assembled the array using those. That works for me also, so the array is running now.. but off of loopback devices instead of the direct raw disks. Before I did that, proc/mdstat was empty. I just now looked in /sys/block/hde/holders, but I don't know how to read it. > This is telling you that /dev/hde - or one of it's partitions - is > "Busy". This means more than just 'open'. It means mounted or > included in an md or dm array, or used for swap. > You need to find out what is keeping it busy. > Most likely dm or md. > What does > cat /proc/mdstat > show? > I don't know much about dm - is there some 'pvlist' command or similar > that will show all the phys volumes it is holding on to.. > > Or possibly just look in /sys/block/hde/holders -- Matt Thrailkill <matt@xxxxxxxxxxxxxx> - 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