Piete Brooks <Piete.Brooks@xxxxxxxxxxxx> wrote: > I really love having my partitions as RAID1 devices as it allows the actual > partition major and minor numbers to change, and allows me to "move" > partitions by adding and removing them from the array. Good idea. > As such I do this even when there is only one partition. To move it, I can > make it a two way mirror, add the new partition, then remove the old. However, I think I'd call that "copying", not moving! > I can't then shrink it back to being a one way mirror. Is there a good reason > for this, or is it just not something that was considered sane? > [ "really" just runs a command as root ] > bedat-32:~: really mdadm -Gn1 /dev/md1 > mdadm: '1' is an unusual number of drives for an array, so it is probably > a mistake. If you really mean it you will need to specify --force before > setting the number of drives. > bedat-32:~: really mdadm -G --force -n1 /dev/md1 > mdadm: option f not valid in grow mode > bedat-32:~: really mdadm --force -Gn1 /dev/md1 > mdadm: -G would set mode to grow, but it is already manage. > bedat-32:~: mdadm -V > mdadm - v1.6.0 - 4 June 2004 > bedat-32:~: rpm -q mdadm > mdadm-1.6.0-2 > bedat-32:~: Well, you could always just remake the mirror with --dangerous-no-resync using mkraid. I don't know if mdadm permits that. I would have thought it supported the semantics in mode create or assemble or whatever, just by virtue of the fact of making an array with one compnent. So try -C or -A. Peter - 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
