Date: Sat, 13 Mar 1999 08:50:52 +1030 From: Greg Lehey <grog@lemis.com> To: Brad Knowles <blk@skynet.be>, freebsd-questions@FreeBSD.ORG, freebsd-stable@FreeBSD.ORG Subject: Re: Vinum questions? Message-ID: <19990313085052.C429@lemis.com> In-Reply-To: <19990312133024.005687@relay.skynet.be>; from Brad Knowles on Fri, Mar 12, 1999 at 01:30:24PM %2B0100 References: <19990312133024.005687@relay.skynet.be>
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On Friday, 12 March 1999 at 13:30:24 +0100, Brad Knowles wrote:
> Folks,
>
> Okay, so I have now torn down the Solaris 2.6/x86 anonymous ftp
> server that I was working on, and have put FreeBSD 3.1-stable on it
> instead. I'm now trying to get vinum working correctly, so that I can
> have my disk partitions back (I guess I should also get ssh installed on
> there, because right now I'm going to have to manually re-type all the
> vinum information ;-).
>
> Anyway, the one hurdle I'm trying to get over at the moment is that
> vinum thinks that the devices /dev/da1c through /dev/da9c do not exist
> (they do -- I created them with MAKEDEV), and therefore it refuses to
> start the disks d1 through d9. Without those disks, of course neither of
> the two plexes start up, and of course the volume fails to start as well.
>
>
> Any suggestions?
RTFM (vinum(8)):
DRIVE LAYOUT CONSIDERATIONS
vinum drives are currently BSD disk partitions. They must be of type
unused in order to avoid overwriting file systems. In later versions of
vinum this requirement will change to type vinum. Use disklabel -e to ed-
it a partition type definition. The following display shows a typical
partition layout as shown by disklabel:
8 partitions:
# size offset fstype [fsize bsize bps/cpg]
a: 81920 344064 4.2BSD 0 0 0 # (Cyl. 240*- 297*)
b: 262144 81920 swap # (Cyl. 57*- 240*)
c: 4226725 0 unused 0 0 # (Cyl. 0 - 2955*)
e: 81920 0 4.2BSD 0 0 0 # (Cyl. 0 - 57*)
f: 1900000 425984 4.2BSD 0 0 0 # (Cyl. 297*- 1626*)
g: 1900741 2325984 unused 0 0 0 # (Cyl. 1626*- 2955*)
In this example, partition g may be used as a vinum partition. Parti-
tions a, e and f may be used as UFS file systems or ccd partitions. Par-
tition b is a swap partition, and partition c represents the whole disk
and should not be used for any other purpose.
vinum uses the first 265 sectors on each partition for configuration in-
formation, so the maximum size of a subdisk is 265 sectors smaller than
the drive.
Vinum ignores partition c. This will become more important when I
finally get round to creating a vinum fstype: c *must* be "unused",
and the vinum partition will then have to be "vinum". It's bad
practice to use partition c for anything except administration,
anyway.
Greg
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