At Thu, 10 Dec 2009 09:39:25 -0600 CentOS mailing list <centos@xxxxxxxxxx> wrote:
>
> I have CentOS 4.x installed on a single 500GB SATA drive. Drive is
> about 10 percent used. I would like to migrate to software RAID 5
> without reinstalling the OS. Was thinking 3 500GB drives. Is that
> possible or must I reinstall?
If you can install 4 drives, eg you have 4 bays and 4 SATA connections,
yes, it is easy. Just install the three new drives (to SATA port 2, 3,
and 4), create the RAID-5 array (actually you'll need one small RAID-1
array for /boot, so you'll create two RAID sets: a small RAID-1 for
/boot and the rest for the RAID-5) and copy everything over. You'll
need to re-install grub (using grub-install) and then shutdown the
machine and move the drive connectors around so that the new drives are
1, 2, and 3, and the old drive is 4 (or remove it completely), and
start the machine up. You can then add the original drive as a hot
spare disk (or not).
>
> Matt
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>
--
Robert Heller -- 978-544-6933
Deepwoods Software -- Download the Model Railroad System
http://www.deepsoft.com/ -- Binaries for Linux and MS-Windows
heller@xxxxxxxxxxxx -- http://www.deepsoft.com/ModelRailroadSystem/
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