----- Original Message -----
From: "Joe Morris (NTM)"
Device: /dev/hda Size: 232.8 Gb F: Type: ST3250623A Mount: Mount By: Start: 0 End: 30400 Used By: RAID sli_ahahafdeeibj Label: Device ID: ata-ST3250623A_4ND4WY67 Device Path: pci-0000:00:0f.0-ide-0:0
Device: /dev/hdb Size: 232.8 Gb F: Type: WDC-WD2500jB-00REA0 Mount: Mount By: Start: 0 End: 30400 Used By: RAID sli_ahahafdeeibj Label: Device ID: ata-WDC_WD2500jB-00REA0_WD-WMANK5725185 Device Path: pci-0000:00:0f.0-ide-0:1
The /dev/hda is the hard drive that openSUSE is currently installed on. The /dev/hdb is the new hard drive I would like to use as a mirror. I would like to have the entire system mirrored, but I only require the /home to be mirrored, because it contains all of my important data. I am not too familiar with the DM RAID, which I think is the fake raid driver for your motherboard (or raid card IIRC from your first post). Assuming that is correct, I wouldn't use it. Software raid now uses the mdadm program instead of raidtools. You could do this, which I am sure would work but will take time. You will need two drives with matching
On 07/08/2007 07:49 AM, Brandon Carl wrote: partition sizes for each raid 1 partition. At the point you are at, I don't think it really matters. If you like the partitioning scheme you have on /dev/hda, match it on /dev/hdb. each partition will need to be marked as Linux Raid. Then, you could create a raid 1 for each partition on /dev/hdb with mdadm with only one disk initially, then format the new raid 1 partitions, then copy from /dev/hda. After copying, you will need to change the partition type of each raided partition on /dev/hda to Linux raid. Then use mdadm to add those partition to your raid 1 partitions from /dev/hdb. This will sync each one in turn. You will then need to edit /etc/fstab to correct your partitions, i.e /dev/hda2 / to /dev/md0 /, etc. You should also edit /boot/grub/menu.lst and correct as necessary (root=/dev/md0, etc), then I would double check everything and reboot. You may or may not need to reinstall Grub, though I probably would via the grub command prompt to triple check it can find everything it needs BEFORE I am booting and it tells me it cannot find..... I have done the above, and it will work. It is a bit of work, and depending on data size will take a while. ALSO, one other thing I just thought about, you would need to add raid1 module to your initrd modules and run mkinitrd to create the raid bootable image. Check out http://lists.opensuse.org/opensuse-amd64/2006-09/msg00034.html for additional info.
-- Joe Morris Registered Linux user 231871 running openSUSE 10.2 x86_64
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Ok, I got as far as creating a raid 1 array for each partition on /dev/hdb. I created these: /dev/md0 /dev/hdb1 / /dev/md1 /dev/hdb3 /home /dev/md2 /dev/hdb5 swap Those were the three partitions on the /dev/hda, and they are the exact same size as the ones on /dev/hda, and even start and end at the same cylinders. I didn't know what to do about the extended partition on /dev/hda which was used for the swap space, I assume. I created the exact same things on /dev/hdb, including extended partition. Now, I don't know what to do. I mount the /dev/md0 as /mnt/raid0, and I can see all the files on it that must have been copied over when I tried the hardware RAID card. It is the exact same thing as my "/" directory. I created a new folder under "/" just to make sure, and it didn't show up in the /dev/md0, so that's good. When I tried to mount /dev/md1 as /mnt/raid1, it gives me an error: "mount: Operation not supported". So I don't know what that means. Also, it won't let me mount the /dev/md2 because it says it looks like swap space, which it is. Now, I don't know how to format the new raid 1 partitions on /dev/hdb so i can copy my data over. And thanks for your help, Joe. -Brandon -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org