From owner-freebsd-questions  Thu Jul  1 18:45: 7 1999
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Message-ID: <377C1980.3A0B4FDD@partitur.se>
Date: Fri, 02 Jul 1999 03:44:32 +0200
From: Palle Girgensohn <girgen@partitur.se>
Organization: Partitur
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To: Greg Lehey <grog@lemis.com>
Cc: freebsd-questions@FreeBSD.ORG
Subject: Re: vinum for root partition?
References: <377BEE3B.A10C4D8@partitur.se> <19990702105804.I87392@freebie.lemis.com>
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Greg Lehey wrote:
> 
> [Format recovered--see http://www.lemis.com/email/email-format.html]
> 
> On Friday,  2 July 1999 at  0:39:55 +0200, Palle Girgensohn wrote:
> > Hi!
> >
> > I'm just setting up a system with two scsi drives, using vinum for
> > mirroring only. Is it possible to use vinum for the also root partition
> > somehow? I realize it not simple.
> 
> Sure, it's just a SMOP.

Sorry, My English isn't native... SMOP? :?)

> > Here's my disklabel (same for both drives):
> > #        size   offset    fstype   [fsize bsize bps/cpg]
> >   a:   144585        0    4.2BSD     1024  8192    16   # (Cyl.    0 - 8)
> >   b:   803250   144585      swap                        # (Cyl.    9 - 58)
> >   c: 17928698        0    unused        0     0         # (Cyl.    0 - 1116*)
> >   e: 16980863   947835    4.2BSD     1024  8192    16   # (Cyl.   59 - 1116*)
> >
> > My plan is to sync the the 'a' partitions, so if one disk dies, the
> > other root partition is useable. But, I guess the system will have to
> > reboot if the drive crashes, since the root fs will be unusable.
> 
> If you're using Vinum, you should have only one partition per disk.

Yes, there's no reason to have more than one vinum partition, I realize
that. You don't mean to say that there's a problem with this setup, I
hope? :-/ It seems to be working fine, anyway.

> 
> > I thought, maybe there's some way to fool the system with some
> > disklabel "magic", or perhaps I can remount a different fs instead
> > of remounting root read-write. Just a wild thought. Any comments?
> > Maybe it's better to mfs mount the root somehow? I'm not sure how to
> > do that in this case...
> 
> You're thinking in the right direction, but I haven't spent enough
> time investigating things to make a statement.  Well, maybe one: this
> particular feature is top of the wish list, so I'll probably do it
> first.  But it won't be tomorrow.
> 

Glad to hear. 

Regards,
Palle


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