2017-12-25 22:53 GMT+01:00 NeilBrown <neilb@xxxxxxxx>: > I suggest you add the new device with "mdadm --add", then try the > reshape with "mdadm --grow /dev/mdXXX --level=6 --raid-devices-4". Ok. > It might not work quite that easily - I think you need to first convert > the raid1 to a 2-way mirror, but that is easy enough > > mdadm --grow /dev/mdxxx --raid-devices=2 Moving from a 3-way mirror to a 2-way mirror is not an issue. What do you suggest ? Adding 3 more disks and creating a striped 3-way mirror or reshaping to a 4-disks RAID-6? Keep in mind that i'll never run anything with redundancy level < 2 and a simple mirror has only "1" as redundancy level (a striped mirror is the same: only one disks could be lost in each mirror pair) -- 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
