Setting up GEOM mirror

[Václav Haisman]

Mike Jakubik wrote, On 25.6.2006 20:14:
> Matthew Seaman wrote:
>> Václav Haisman wrote:
>>  
>>> Hi,
>>> I want to set up GEOM mirror of whole existing partitioned 250G disk.
>>> The procedure described at <http://people.freebsd.org/~rse/mirror/>
>>> seems to be rather long/complicated. I thought about using this:
>>>
>>> # Boot into single user, then...
>>> # First change fstab.
>>> cp -p /etc/fstab /etc/fstab.orig
>>> sed -e 's/dev\/ad0/dev\/mirror\/gm0/g' </etc/fstab.orig >/etc/fstab
>>> # Then create the mirror.
>>> gmirror label -v -b split -s 2048 mymirror ad0
>>> gmirror insert -h mymirror ad2
>>> # Reboot into the new World order.
>>> shutdown -r now
>>>
>>> Will this work or is it wrong? I appreciate any comment to this.
>>>     
>>
>> http://www.onlamp.com/pub/a/bsd/2005/11/10/FreeBSD_Basics.html
>>   
> 
> The problem with these instructions is that they don't take in to
> account the last sector. You may very well end up writing the metadata
> on the file system.
Hmm, this is goot to know. However in my case it will be ok, I have some
spare space at the end of the disk.

--
Vaclav Haisman

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