On Tue, 28 Sep 2010 12:11:35 +0100 Tim Small <tim@xxxxxxxxxxx> wrote: > On 21/09/10 21:29, Neil Brown wrote: > >> I think you need to stick the output of > >> > >> mdadm --examine --scan > >> > >> into /etc/mdadm/mdadm.conf > >> > > It is generally better to use > > mdadm --detail --scan > > > > for generating mdadm.conf as it is more likely to get the device names > > right. And when doing this by hand, always review the output to make sure it > > looks right. > > > > > Thanks for that Neil - Debian (and thus Ubuntu) currently uses the > output of "mdadm --examine --scan --config=partitions" when > autogenerating the mdadm.conf output. Should this be considered a bug? > If so, could you give a bit of detail, and I'll open a bug for the > script.... > > Thanks, > > Tim. > It all depends on what you want to do. If you want a config file which described the current configuration, then "--detail --scan" is definitely the thing to use. If you want a config file that records what is on the devices currently attached to the machine, then "--examine --scan" is what you want. Any use of "--examine --scan" is probably better left to the auto-assembly stuff in mdadm (mdadm -As). So Debian should probably be using --detail --scan. However without a statement of the exactly purpose and context, one cannot be certain. 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
