On Mon, Oct 15, 2007 at 09:43:52AM -0400, Douglas A. Tutty wrote: > On Mon, Oct 15, 2007 at 01:43:42PM +1000, Alex Samad wrote: > > > > I have a system with 3 x 200G setup as a raid 5 config, I have just purchased > > to 750g drives with the thought of using raid1. > ^^ do you mean two? yep > > > > I could remove one of the 200G drive - run the raid5 in degraded mode and > > create a raid1 in degraded mode. > > > > I also use lvm2, so moving most of it should be easy ? > > > > I don't have any media to do a backup and restore to (although I do have an > > external usb HD case ?) > > > > Are there any other options ? > > I don't understand the problem. Are you saying that your box will only > take 4 drives? I'll assume that this is the case and if its not, let us > know and we'll go on a new assumption. max of 3 drives > > So, I would put one of the new 750 GB drives in the external USB HD > case. Attach it to the box and ensure that udev assigns it a sd* > device. Add the second 750 GB drive into the box itself. You should > now have 5 sd* drives. > > At every step, you'll need to verify with all the LVM and raid tools > that everything is valid and synced. > > Now, set up the two 750 GB drives as your raid1 array. Assuming that > you only have one volume group in your LVM. > > You should now have md0 (your raid5 array) and md1 (your raid1 array). > > Now add md1 to your volume group. Check the vgdisplay, lvdisplay, etc > to ensure all is well. > > Now pvremove the md0 array from the volume group and wait while LVM > migrates things over to the new drives. > > Once you ensure that md0 is no longer being used in the LVM, you can > tear down md0. > > Now physically remove on of those 200 GB drives and move the 750 GB > drive from the external USB box to the internal box. > > On boot up, you should be running with everything on your raid1. Thanks, I was more interested in being able to change a raid5 into a raid1 weather mdadm was able to it. I recently found out I could extend raid1 disks. > > Doug. > > > -- > To UNSUBSCRIBE, email to debian-user-REQUEST@lists.debian.org > with a subject of "unsubscribe". Trouble? Contact listmaster@lists.debian.org > >
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