On LVM+RAID (was Re: [clue-tech] ubuntu linux)

[mike havlicek]

I agree RAID + LVM may not be for newbies. But in the
distros that I have used you can bypass the disk
configuration all together. I used to have to do this
when using in particular the DAC RAID controllers
because they were best with params that were not
offered in the canned disk setup. 

Actually the statement about lvm2 is a little
misleading if I understand it correctly. Actually the
current kernels can run the old lvm. 

Where I got into trouble was when trying to add a new
array after the initial install. At this point I have
successfully added the array using command line
utilities: pvcreate, vgcreate, and lvcreate + the
standard filesystem utils and finishing it up with a
piece of tape on fstab :)

-Mike
--- Crawford Rainwater
<crawford.rainwater at linux-etc.net> wrote:
> In regards to LVM + RAID on a "Debian like"
> system...
> 
> Though I have not done an install of Ubuntu (did
> play with the "live CD"
> a bit though), considering it is based off of Debian
> and using a 2.6
> kernel (thus LVM2), it is possible to do (via Debian
> Sarge and quite a
> bit of trial and error)...but I suspect without
> something like SuSE or
> RedHat's Disk Druid during an install, it is not for
> the faint of heart.
> A LVM setup alone would be a nice optimal way down
> the road to prevent
> headaches too.
> 
> The inital partitioning schema I used for those who
> are curious is as
> follows:
> hda1 /boot 75MB
> hda2 swap 256MB
> hda3 / 1GB
> hda4 LVM (aka "vgroot")
> - /dev/vgroot/usr 10GB
> - /dev/vgroot/var 10GB
> - /dev/vgroot/opt 5GB
> - /dev/vgroot/tmp 2GB
> - /dev/vgroot/home 5GB
> 
> This is similar to the Gentoo Wiki on LVM + RAID
> setups, which I tried
> via Debian first, then moved over to Gentoo later. 
> Works quite
> nicely. :-) 
> 
> If people are up for experimenting with it at the
> InstallFest, I have
> 5.04 for i386 and x64 on CDs now in the pile. 
> Should be interesting I
> think any which case.
> 
> --- Crawford
> -- 
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