Brandon Carl wrote: > ----- Original Message ----- From: "Joe Morris (NTM)" > <[EMAIL PROTECTED]> > To: <opensuse@opensuse.org> > Sent: Saturday, July 07, 2007 5:40 PM > Subject: Re: [opensuse] Software RAID with existing drive > > >> On 07/08/2007 07:49 AM, Brandon Carl wrote: >>> 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 >> 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 >> >> >> >> >> >> -- >> To unsubscribe, e-mail: [EMAIL PROTECTED] >> For additional commands, e-mail: [EMAIL PROTECTED] >> >> >> > > 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 The way I did it is Using Yast 1) Partition disks, leaving 3 cylinders for /boot 2) Create one large RAID array over all disks 3) Used LVM to create desired partition structure, including SWAP 4) Finished installation of SUSE.
In a RAID 5 array, you want SWAP included, as if it fails without RAID your system will die anyway. So, in my system, everything except /boot is on RAID. And while I haven't done it yet, I could replicate /boot across all 4 drives, so that I can always reboot, with any drive down. -- Use OpenOffice.org <http://www.openoffice.org> -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
