Date: Mon, 11 Mar 2002 11:37:41 -0500 (EST) From: Jason Borkowsky <jcborkow@tcpns.com> To: questions@freebsd.org Subject: Using VINUM to do RAID-1 disk mirroring Message-ID: <Pine.BSF.4.44.0203111127290.3699-100000@bemused.tcpns.com>
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I have two FreeBSD machines, both containing a pair of identical hard
drives. I am looking to set up vinum to mirror the hard drives, and am not
having any success. I have searched the FreeBSD archives, the vinum website,
and other websites as well.
Here is what I've found so far:
Each drive needs to have the file system type changed from FreeBSD to vinum.
I have done this no problem. (A side question I have about this is will this
affect me if I reboot the machine or am an single user mode? What effects
does changing the file system type have?)
So now I have two drives, /dev/ad0s1 and /dev/ad2s1 (IDE devices). FreeBSD
calls partition "c:" the complete drive, so on one drive (the drive I want
mirrored), I have all my file partitions. On the drive I want to mirror to,
I only have one partition, c:, which is the whole drive. Before I mirror, do
I need to set up identical partitions? According to the man pages, it seems
I don't have to.
Now, in the man pages, under "Simplified Configuration", it states that to
mirror a drive, all I need to do is:
vinum -> mirror -v /dev/ad0s1c /dev/ad2s1c
The response I SHOULD get is:
drive vinumdrive0 device /dev/ad0s1c
drive vinumdrive1 device /dev/ad2s1c
Instead, the actual response I get is:
Could not allocate device vinumdrive0
So what have I done wrong? The man page gives no more information than the
simple,, one magical command that should do everything. Any suggestions are
appreciated.
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