Thanks so much. That fixed it. It is now up and running. Tom :o) > -----Original Message----- > From: linux-raid-owner@vger.kernel.org [mailto:linux-raid- > owner@vger.kernel.org] On Behalf Of Neil Brown > Sent: Wednesday, July 03, 2002 6:15 PM > To: Thomas Hicks > Cc: linux-raid@vger.kernel.org > Subject: Re: Mdadm issue > > On Monday July 1, thicks@speedfreak.org wrote: > > This is the first time I am setting up raid using the mdadm tool. This > > is what I am trying to do. > > > > The sever is as follows: 2 drives at 10gig > > 2 drives at 80gig > > hda2 is / > > hdd1 is my /home > > > > I have the other drives in ad ready and would like to set up the 2 10 > > gig's as a mirror and the 2 80 gig as raid0 > > > > At the shell I run this command > > > > mdadm --create /dev/md0 --level=1 --raid-disks=2 /dev/hda2 /dev/hdb1 > > and get the following output: > > > > mdadm: /dev/hda2 appears to contain an ext2fs file system > > size=7269412K mtime=Mon Jul 1 11:56:16 2002 > > mdadm: /dev/hdb1 appears to contain an ext2fs file system > > size=7333640K mtime=Mon Jul 1 11:56:29 2002 > > Continue creating array? y > > mdadm: SET_ARRAY_INFO failed for /dev/md0: File exists > > > > Could someone please help me with this problem. I am having a really > > hard time finding any info on the web about this. > > hda2 is mounted as / and you are trying to make a raid1 array > containing it. This cannot work. > What you want to do is: > > mdadm --create /dev/md0 --level=1 --raid-disks=2 missing /dev/hdb1 > > to create a degraded array containing just hdb1. > Then: > mkfs /dev/md0 > mount /dev/md0 /mnt > cp -ax / /mnt > > to copy your root filesystem onto /dev/md0. > Then tell lilo: > append= "root=/dev/md0 md=0,/dev/hdb1" > and tell fstab that root in on /md0, and reboot. > > Then you should be be running with root on /dev/md0 which consists of > /dev/hdb1, and /dev/hda2 will be unused. > Then > mdadm --add /dev/md0 /dev/hda2 > to add hda2 to the mirror. Wait for resync. > Change lilo.conf to say the right thinggs, run lilo and reboot. > > Note: it appears that hdb1 is bigger than hda2. If this is so you > will need to give a --size= to mdadm when created md0 so that it is > small enough to be able to use hda2. > Subtract 128 K from the size of hda2, so > mdadm --create /dev/md0 --size=7269280 ...... > > NeilBrown > > - > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@vger.kernel.org > 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@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
