Maybe you should be able to list the device(s) to be removed. And maybe "missing" should be an option. So, he could say: --grow /dev/md0 --raid-disks 2 missing I guess if it assumed you wanted to remove failed devices first, you could just fail the devices you want to remove. Just thinking! Guy > -----Original Message----- > From: linux-raid-owner@xxxxxxxxxxxxxxx [mailto:linux-raid- > owner@xxxxxxxxxxxxxxx] On Behalf Of Neil Brown > Sent: Tuesday, May 10, 2005 7:41 PM > To: John McMonagle > Cc: linux-raid@xxxxxxxxxxxxxxx > Subject: Re: grow problem > > On Tuesday May 10, johnm@xxxxxxxxxxx wrote: > > Having a problem changing my number of mirrors on a raid1 from 3 to 2. > > > > Did it about a week ago on another system so I'm a bit perplexed. > > > > mdadm --grow /dev/md0 --raid-disks 2 > > mdadm: Cannot set device size/shape for /dev/md0: Device or resource > busy > > > > cat /proc/mdstat > > Personalities : [raid1] > > md0 : active raid1 sda1[0] hda1[2] > > 976640 blocks [3/2] [U_U] > > md/raid1 currently requires and devices that you plan to remove with > --grow, to already be missing. > > So you would need to fail and re-add hda1, which would mean a full > rebuild :-( > > If you can afford to: > - wait a few days > - recompile your kernel > - be a guinea pig > > I can get raid1 to try to move devices into earlier holes before > reducing the size. Let me know, and I'll start working on a patch. > > 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 - 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
