Re: [linux-lvm] lvm on linux RAID5?

From: Andreas Baier <andreas.baier@mindmatics.de>
To: linux-lvm@sistina.com
Subject: Re: [linux-lvm] lvm on linux RAID5?
Date: Wed Oct 16 09:14:11 2002	[thread overview]
Message-ID: <3DAD6B1C.2050903@mindmatics.de> (raw)
In-Reply-To: 1034773372.1658.8.camel@frodo.xelin.se

Hi,

here´s the quick way

1. define your raid-partitions with fdisk by asgning them 0xfd
2. setup your /etc/raidtab
3. issuning raidstart -c /etc/raidtab should start  your md-device
4. asume you just use one md device you would now have md0 as
    your raid-device
5. Now you can pvcreate /dev/md0
6. than vgcreate whatevervgname /dev/md0
7. lvcreate what you like on that vg

for creating the raid5 have a look at that sample:

# Sample raid-5 configuration
raiddev                 /dev/md0
raid-level              5
nr-raid-disks           3
chunk-size              32

# Parity placement algorithm

#parity-algorithm       left-asymmetric
parity-algorithm        left-symmetric
#parity-algorithm       right-asymmetric
#parity-algorithm       right-symmetric

# Spare disks for hot reconstruction (not supported yet)
#nr-spare-disks         0

device                  /dev/hda1
raid-disk               0

device                  /dev/hdb1
raid-disk               1

device                  /dev/hdc1
raid-disk               2

Best regards

Anders Henriksson wrote:

> Hej,
> 
> I have tried scanning the list archive and re-read the documentation but
> still....
> 
> I want to run lvm over four linux raid5 devices, can I just treat the
> raid devices as discs? i.e. run pvcreate on them directly and go on from
> there.
> 
> I am running a linux 7.3 server almost out of the box.
> 
> /Anders
> 
> 
> 
> 
> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@sistina.com
> http://lists.sistina.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
> 
> 
> 

-- 
Andreas Baier