From owner-freebsd-questions  Tue Oct 16  9:55:47 2001
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Date: Tue, 16 Oct 2001 09:55:41 -0700 (PDT)
From: Jim Flournoy <bsdspaceman@yahoo.com>
Subject: Re: A missing hard drive + vinum questions
To: Greg Lehey <grog@FreeBSD.org>, freebsd-questions@freebsd.org
In-Reply-To: <20011016093713.D14629@wantadilla.lemis.com>
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--- Greg Lehey <grog@FreeBSD.org> wrote:
> On Monday, 15 October 2001 at  7:16:23 -0700, Jim
> Flournoy wrote:
> > Hello.  I have 2 4.5G scsi hard drives that I just
> > installed FreeBSD 4.3 on.  Actually I assume its
> only
> > installed on 1, cause when I type df -m it only
> shows
> > me one of the hard drives.
> 
> df only shows mounted file systems, whether or not
> they're on disk.
> 
> > Anyway, can anyone else think of another test to
> see if the system
> > recognized the other drive?
> 
> 1.  Look in dmesg.  If you've lost the beginning,
> the dmesg as of boot
>     time is in /var/run/dmesg.boot.
> 2.  For SCSI disks only, use 'camcontrol devlist'.
Greg,

Thanks for the pointers.  Here is relevant output from
dmesg.  

ahc0: <Adaptec 2940 SCSI adapter> port 0xf400-0xf4ff
mem 0x2000000-0x2000fff irq 10 at device 14.0 on pci0
aic7870: Wide Channel A, SCSI Id=7, 16/255 SCBs
ahc1: <Adaptec 2940 SCSI adapter> irq 0 at device 15.0
on pci0
ahc1: can't allocate register resources
ahc1: Platform free
device_probe_and_attach: ahc1 attach returned 12

This seems to indicate that it can find both drives,
but that ahc1 is not part of the system, right?  I
apropos'ed 'filesystem' and found a function,
VFS_START, that seems relevant to making a filesystem,
but I doubt this is what I'm looking for.  I'm pretty
sure that the second disk isn't mountable because
camcontrol devlist returned this:

<IBM DCHS04U 2929>                 at scbus0 target 0
lun 0 (pass0,da0)

I'm still trying to digest the man pages for vinum.
I've looked in the handbook at 

http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/raid.html


but it only describes ccd.  Right now I'm just trying
to figure out exactly what state the second disk needs
to be in, in order to use it for redundant storage.

Can anyone make a suggestion about this or maybe
another resource for this?
Jim

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