[RLUG] LVM and RAID

[Damon Jacobsen]

In doing the drive partitioning as I specified, is it possible to later increase the raid partition size? In other words, if I replaced my 200G drives with 300G drives, would I be able to up the partition size on all 4 drives to 300G for raid use?

Damon


----- Start Original Message -----
From: "Damon Jacobsen" <CodeDragon at runbox.com>
To: ssmith at cse.unr.edu
Subject: Re: [RLUG] LVM and RAID

> My new computer has (2) 300G and (2) 200G hard drives. As I see it , using LVM and RAID a good setup might be to partitioln and combine as follows:
> 
> hda
>    1 200G
>    2 99G
>    3 1G
> hdb
>    1 200G
>    2 99G
>    3 1G
> hdc
>   1 200G
> hdd
>    1 200G
> 
> Then combine hda2, and hdb2 into a raid1. Then combine hdx2 into a raid 5.
> 
> Further I would use these arrays in LVM so that the raid1 is used for kernel level things and the raid5 for user and storage locations. I am not sure where some of these should end up however. I am sure /home should go on the raid5 and /boot and /etc on the raid1, but the others like /usr and /var, I am unsure where I should put them.
> 
> hdx3 would be used for swap partitions.
> 
> Any suggestions to this plan would be helpful.
> 
> Damon
> 
> 
> ----- Start Original Message -----
> From: Sebastian Smith <ssmith at cse.unr.edu>
> To: Damon Jacobsen <CodeDragon at runbox.com>
> Subject: Re: [RLUG] LVM and RAID
> 
> > Damon,
> > 
> > I use LVM on top of SW RAID all the time.  It a very easy setup.  Here are
> > two "howto" docs I use all the time:
> > 
> > http://www.gentoo.org/doc/en/gentoo-x86-tipsntricks.xml (the software RAID
> > section)
> > 
> > http://www.gentoo.org/doc/en/lvm2.xml
> > 
> > Gentoo configuration of RAID and LVM2 maps 1:1 with all other Linux
> > distros.
> > 
> > I'm currently running LVM2 on top of SW RAID 5 on 2 machines -- soon to be
> > 4.  Performance is excellent... for the cost.
> > 
> > - Sebastian
> > 
> > 
> > On Fri, 18 Nov 2005, Damon Jacobsen wrote:
> > 
> > > Is there a way to combine LVM usage with software raid? I would like to get the easy drive remapping of LVM with the added benefit of increased throughput and mirroring of raid. My Nvidia 4 chipset allows a mock raid system, but research shows that using linux raid utils is faster.
> > > 
> > > Thanks
> > > Damon
> > > 
> > > _______________________________________________
> > > RLUG mailing list
> > > RLUG at rlug.org
> > > http://lists.rlug.org/mailman/listinfo/rlug
> > > 
> > 
> > 
> 
> ----- End Original Message -----
> 
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----- End Original Message -----