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From: Erich Dollansky <erichfreebsdlist@ovitrap.com>
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Date: Wed, 9 May 2012 20:54:47 +0700
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Cc: Alejandro Imass <ait@p2ee.org>, Robert Bonomi <bonomi@mail.r-bonomi.com>
Subject: Re: UFS Crash and directories now missing
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Hi,

On Wednesday 09 May 2012 20:30:37 Alejandro Imass wrote:
> On Wed, May 9, 2012 at 8:53 AM, Erich Dollansky
> <erich@alogreentechnologies.com> wrote:
> > Hi,
> >
> > On Wednesday 09 May 2012 18:57:06 Alejandro Imass wrote:
> >> On Thu, May 3, 2012 at 1:14 PM, Alejandro Imass <ait@p2ee.org> wrote:
> >> > On Thu, May 3, 2012 at 9:35 AM, Robert Bonomi <bonomi@mail.r-bonomi.com> wrote:
> >> >>
> >>
> >> [...]
> >>
> >> >> One comment: for 'defensive' purposes it would be useful to break ad6 up
> >> >> into two slices, putting 'basejail' in it's own slice.  Then, for production
> >> >> use, that slice can be mounted RO, and with the 'system immutable' flag
> >> >> set on everything in that filesystem.
> >> >>
> >> >
> >> > Yes. From one of your posts that became somewhat clear to me: Having
> >> > all the jails on a single 150GB slice seems like a bad idea.
> >> >
> >>
> >> For your recommendation above, what are the advantages or differences
> >> of slicing the disk versus partitioning on a single slice?
> >>
> > it could be a misunderstanding. What is a partition? What is a slice. I have to look always into the handbook. Anyway, as long the OS see different units which have to be mounted independent of each other, it all does not matter what is what.
> >
> 
> I meant in Unix terms of course. Slice is slice (partition in other
> OS) and partition a thru h
> 
> The question is if it has any advantage of using a slice to mount the
> basejail in RO as opposed to doing the same thing on a partition.
> 
I do not think so. As long it is mounted as a separated unit, FreeBSD has to keep everything separated.

Erich