Setup of a software RAID-1 to an existing system?

[Greg 'groggy' Lehey]

On Monday, 23 June 2003 at  5:00:23 +0300, Johan Paul wrote:
> Hi all!
>
> This is repost from freebsd-newbies mailing list since this might be a
> more suitable mailing list for my question.
>
> I am pretty new to FreeBSD but thought it might be a nice idea to
> migrate from a Linux server to a FreeBSD one.
>
> My question is regarding software RAID-1 for this FreeBSD box. I have
> two qually sized IDE hard drives and I installed FreeBSD 4.8 on the
> other one. Now the question is: can I make a RAID-1 array of these
> two disks while FreeBSD is installed on the other one (using vinum or
> other...)? Or how do I get RAID-1 to work on these two disks? FreeBSD
> got one slice from each disk that occupy the whole disk. Only the first
> disk is partitioned into 4 pieces (details about the partitions might be
> unneccesary...?).
>
> I've read some of the vinum documentation but it is unclear to me if
> it is possible to set up a RAID-1 on a running file system - and if my
> assumptions are correct, that it is impossible, it is unclear to me
> how to set up this software RAID-1?

You might like to take a look at
http://www.vinumvm.org/cfbsd/vinum.pdf or
http://www.vinumvm.org/cfbsd/vinum.txt.  This is the Vinum chapter
from "The Complete FreeBSD".

Greg
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