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Date:      Fri, 30 Mar 2001 10:24:06 +0930
From:      Greg Lehey <grog@lemis.com>
To:        Tony Landells <ahl@austclear.com.au>
Cc:        Neil Darlow <neil@darlow.co.uk>, FreeBSD Questions <freebsd-questions@FreeBSD.ORG>
Subject:   Re: Can anyone help a newbie with vinum?
Message-ID:  <20010330102406.A61395@wantadilla.lemis.com>
In-Reply-To: <200103292321.JAA27472@tungsten.austclear.com.au>; from ahl@austclear.com.au on Fri, Mar 30, 2001 at 09:21:16AM %2B1000
References:  <neil@darlow.co.uk> <200103292321.JAA27472@tungsten.austclear.com.au>

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On Friday, 30 March 2001 at  9:21:16 +1000, Tony Landells wrote:
> Search the list archives, Greg Lehey <grog@lemis.com> and I went
> through this in late January, and then it was done again in about
> mid-February.
>
> Refer to those discussions for a complete guide, but here's the
> short answers to your questions:
>
>
> neil@darlow.co.uk said:
>> 1) What is the vinum filesystem type number (for partitioning)?
>
> "vinum".  But you need to do this with disklabel post-install because
> the install process doesn't do vinum.
>
>> 2) Do I create a single vinum partition to hold all the mirrored
>>    components, or do I create separate ones for each?
>
> Well, the option is yours, but the recommendation is to create a single
> vinum partition and then divide it within vinum.
>
> Apart from saving you a reasonable amount of disk space (because you
> have 265 blocks of vinum management data per vinum partition), the
> discussions earlier this year assume single vinum partitions per
> disk.

A bigger issue is performance: every configuration update (change of
state) flushes the information to each drive.  Have multiple drives
per spindle and you slow things down.

Greg
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