Re: Dealing with Raid 1

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Thanks you for your long reply !
it,s really appreciated

franck
On 12/12/05, Christofer C. Bell <christofer.c.bell@xxxxxxxxx> wrote:
> On 12/12/05, Franck Y <franck110@xxxxxxxxx> wrote:
> > Martin,
> > Does it delete my files ?
> > And when i will make the raid configuration ?
>
> I'd recommend allowing someone else to look these directions over, but
> I believe this will create your mirrored devices while preserving your
> data.  I'm not terribly familar with LVM under Linux so again, I'd
> encourage you to let someone else look these steps over for
> correctness before using them.
>
> These are basically step by step commands that create a 2 new md
> devices for your 2 mirrored partitions, each mirror containing only 1
> device.  These devices then have your data copied over to them.  After
> the data is copied onto the md devices, the additional disks are
> added.  The md subsystem then takes care of syncing the mirrors
> automatically.
>
> mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/hda2 missing
> mdadm --create /dev/md1 --level=1 --raid-devices=2 /dev/hdc2 missing
> mke3fs /dev/md0
> mke3fs /dev/md1
> mkdir /mnt/md0
> mkdir /mnt/md1
> mkdir /mnt/hda1
> mkdir /mnt/hdc1
> mount -t ext3 /dev/md0 /mnt/md0
> mount -t ext3 /dev/md1 /mnt/md1
> mount -t ext3 /dev/hda2 /mnt/hda1
> mount -t ext3 /dev/hdc2 /mnt/hdc1
> cp -av /mnt/hda2 /mnt/md0
> cp -av /mnt/hdc2 /mnt/md1
> umount /mnt/md0
> umount /mnt/md1
> umount /mnt/hda1
> umount /mnt/hdc1
> mdadm --add /dev/md0 /dev/hda1
> mdadm --add /dev/md1 /dev/hdc1
> mdadm --detail --scan | head -1 > /etc/mdadm.conf
>
> You'll want to create the appopriate entries in /etc/fstab to ensure
> these are mounted at boot time.  Also, you'll probably want to edit
> /etc/mdadm.conf to add the following above each ARRAY line:
>
> DEVICE partitions
> MAILADDR root
>
> At the end of each ARRAY line, you'll want to add the option auto=md
> -- this will force mdadm to create the appropriate md devices in /dev
> should they not exist at the time the mirrored volumes are found at
> boot.
>
> Best of luck!
>
> --
> Chris
>
> "I trust the Democrats to take away my money, which I can afford.  I
> trust the Republicans to take away my freedom, which I cannot."
>
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>


--
Franck


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