thanks but
# mdadm --add /dev/md1 --raid-devices=3 --spare-devices=0 /dev/sde1 mdadm:option --raid-devices not valid in manage mode # mdadm --add /dev/md1 --spare-devices=0 /dev/sde1 mdadm:option --spare-devices not valid in manage mode # mdadm --grow /dev/md1 --raid-devices=3 --spare-devices=0 mdadm:option --spare-devices not valid in grow mode Am 14.04.2015 12:07, schrieb Darac Marjal: > On Tue, Apr 14, 2015 at 11:42:22AM +0200, basti wrote: >> Hello >> I want to add a 3rd drive to a raid 1 array (for disaster backup, the >> drive will be connectet once a week). >> I dry: >> >> mdadm --add /dev/md1 /dev/sde1 >> >> when I fail the drive there is a message >> >> FailSpare event detected on md device /dev/md/1, component device /dev/sde1 >> >> How can I add the 3rd drive as "real drive" and not as spare? > Looking at the mdadm manpage (i.e. I've not tried this myself), you > could try being moew explicit about things: > > mdadm --add /dev/md1 --raid-devices=3 --spare-devices=0 /dev/sde1 > > (Note however that the manpage I'm reading - the one in Wheezy - seems a > little unsure whether the option is --raid-devices or --raid-disks). > > I think, also, you can convert /dev/sde1 from "spare" to "live" by > issuing: > > mdadm --grow /dev/md1 --raid-devices=3 --spare-devices=0 > > One last thing to be aware of. If you DO set up your three-disk RAID1 > and then take the "backup" drive out of the set, be aware that that will > mark the RAID as "degraded" and expect to get warnings to that effect. > > There doesn't appear to be a way to re-mark a device as spare so, to > cleanly remove it, you will need to mark it as faulty (mdadm /dev/md1 -f > /dev/sde1). I don't know, off-hand, if this will affect the backup, > though. > >> Best Regards >> >> >> -- >> To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org >> with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org >> Archive: https://lists.debian.org/552ce0fe.2030...@arcor.de >> -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/552cea8f.9020...@arcor.de
