On 2017-Jul-23 09:03, NeilBrown wrote: > The UUID you give to mount is the UUID of the filesystem, not of the > device (or array) which stores the filesystem. > > One of the problems with use 1.0 metadata (or 0.90) is that the first > component device looks like it contains the same filesystem as the whole > array. I think this is what is causing your confusion. Yes, I mixed up those two. Now is all clear. > This all depends on the details of the particular distro you are using. > You don't, in general, need arrays to be listed in mdadm.conf. A > particular distro could require it though. > > If you run > mdadm -Es > > It will show a sample mdadm.conf which should contain /dev/md/3 - the > new raid10, and /dev/md/4. > You could add those lines to mdadm.conf, then > mdadm --assemble /dev/md/3 > mdadm --assemble /dev/md/4 > and it should get assembled. Then you should be able to mount the large > filesystem successfully. Well, I feel much better now that I do have arrays listed in mdadm.conf and in /dev. Thanks very much for your help, Neil! Regards, Veljko -- 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