[lug] RAID installation on Fedora 6 Zod

User Dan Ferris dan at usrsbin.com
Mon May 21 10:13:07 MDT 2007

You can do gmirror at the OS install or after.  It matters not.  The 
FreeBSD installer gives no way to use it.  I usually do it after booting 
into FreeBSD the first time.  It's about a 2 minute process.

On Mon, 21 May 2007, Sean Reifschneider wrote:

> On Wed, May 16, 2007 at 02:40:52PM -0600, User Dan Ferris wrote:
>> I was saying Linux software RAID is harder compared to Solaris software
>> RAID and FreeBSD's software RAID because it's much harder to set it up
>> after the OS is installed.  With metainit and gmirror you can create arrays
>> without dealing with copying things from disk to disk.
> The first hit on google for "gmirror" says:
>   It made more sense to me to configure RAID during the install of the
>   operating system.
> The man page for gmirror says that it uses on-disc meta-data, so you can't
> just lay it down on an existing file-system unless there's room for the
> meta-data there already.  Which makes it sound like you'd run into the same
> problems as with Linux software RAID, which also uses on-disc meta-data.
> Of course, in Linux you can also build arrays without using the on-disc
> meta-data, meaning that you can mirror a partition without modifying it at
> all...  However, I wouldn't recommend it.
> Getting back to the original poster, I'm assuming that if you are asking on
> a mailing list about doing it on a recently installed machine that "let the
> installer take care of it" is an answer that is likely to meet their needs.
> I don't have time to document how you would go about doing this, but I do
> have time to suggest this, possibly overlooked, option.
> Sean
> -- 
> "You took quite a chance..."  "You take a chance getting up in the morning,
> crossing the street, or sticking your face in a fan."  -- Police Squad
> Sean Reifschneider, Member of Technical Staff <jafo at tummy.com>
> tummy.com, ltd. - Linux Consulting since 1995: Ask me about High Availability
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