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Date:      Mon, 20 Sep 1999 12:22:33 +0930
From:      Greg Lehey <grog@lemis.com>
To:        river <river@theriver.nu>
Cc:        Ulairi <ulairi@jps.net>, Questions <freebsd-questions@FreeBSD.ORG>, jake@checker.org
Subject:   Re: VINUM
Message-ID:  <19990920122233.L55065@freebie.lemis.com>
In-Reply-To: <21DC5E98AE1FD311B1290020AFDB6C6E63F2@cx288885-b.okcs1.ok.home.com>; from river on Sun, Sep 19, 1999 at 09:36:36PM -0500
References:  <21DC5E98AE1FD311B1290020AFDB6C6E63F2@cx288885-b.okcs1.ok.home.com>

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On Sunday, 19 September 1999 at 21:36:36 -0500, river wrote:
> On Sunday, September 19, 1999 8:07 PM, Greg Lehey [mailto:grog@lemis.com] wrote:
>> [Format recovered--see http://www.lemis.com/email/email-format.html]
>>
>> On Sunday, 19 September 1999 at 19:24:25 -0500, river wrote:
>>> On Sunday, September 19, 1999 7:02 PM, Ulairi <ulairi@jps.net> wrote:
>>>> On Sunday, September 19, 1999 16:53, river wrote:
>>>>>
>>>>> I read there also.....it is the same content in "The Complete FreeBSD"
>>>>> manual....
>>>>>
>>>>> I was looking for some more information....they are both quite vague
>>
>> If you think they're vague, I'd like to know what you're missing.
>>
>>>> What kind of info are you looking for?
>>>
>>> I currently have this configuration:
>>>
>>> # Device                Mountpoint      FStype  Options         Dump
>>> Pass#
>>> /dev/da1s1b             none            swap    sw              0       0
>>> /dev/da0s1a             /               ufs     rw              1       1
>>> /dev/da1s2e             /home           ufs     rw              2       2
>>> /dev/da0s3e             /tmp            ufs     rw              2       2
>>> /dev/da0s4e             /usr            ufs     rw              2       2
>>> /dev/da0s2e             /var            ufs     rw              2       2
>>>
>>>
>>> I want to mirror /usr  and / and /var
>>>
>>> I need to find info regarding this mirror
>>
>> Your question suggests that you haven't read the documentation.  Read
>> it again and tell me what you don't understand.
>
> I finally found something on the net that was usefull regarding setup of
> vinum:
>
> http://www.freebsdzine.org/199905/features/vinum.html

Interesting.  I didn't know about this.

There were a couple of factual problems with this article.  In
particular, it mentions using /dev/wd0s1e and /dev/wd1s1f for the
drives; this didn't work in conjunction with the 'start' command at
the time, though it does now for 3.3-RELEASE.

I don't recommend to have the device names end in a-h; instead, I
recommend to use the -v option for newfs.  It's conceivable that I
once wrote something like that as a recommendation before newfs got
the -v option, but if it's still there, I'd like a pointer.

> this is a little more reader friendly....I now have the basics down
> and can refer to the lemis website for specifics.

The real problem with this article is that it is incomplete.  It
doesn't tell you how to build a mirror.  Jake, are you planning to
write more?

> One last questions:  Will I have to build the 2 slices and then the volume
> first and then copy over /usr ?  Or can it mirror on the fly without me
> having to trash the current slice ?

RTFM.  You can't work with this stuff until you understand it.  You
can completely trash your system otherwise.

Greg
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