[linux-lvm] lvm on linux RAID5?

[Andreas Baier]

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 at sistina.com
> http://lists.sistina.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
> 
> 
> 


-- 
Andreas Baier