Re: [linux-lvm] Help on LVM/SW-RAID build problems

[svetljo <galia st-peter stw uni-erlangen de>]

Hi
you shouldn't change the softRAID partition id to lvm
you had to create the lvm over the RAID

> 1) fdisk error
>
> Disk /dev/hdb: 255 heads, 63 sectors, 2434 cylinders
> Units = cylinders of 16065 * 512 bytes
>
>   Device Boot    Start       End    Blocks   Id 
> System
> /dev/hdb1             1        64    514048+  8e 
> Linux LVM
> /dev/hdb2            65       702   5124735   8e 
> Linux LVM
> /dev/hdb3           703      1340   5124735   8e 
> Linux LVM
you have destroyed the RAID

> Command (m for help): w
> The partition table has been altered!
>
>
> 2) No such file error
you have no the raid devices hdb[1-3]

> root bo:~ > raidstop --all
> cannot determine md version: No such file or directory
>
> kingate bo:~ > /sbin/mkraid
> cannot determine md version: No such file or directory
>
> kingate bo:~ > /sbin/mkraid --really-force /dev/md1
> cannot determine md version: No such file or directory
>
> 3) Partiton type
>
> Is it OK to use the partition type "0x8e" for
> LVM/SW-RAID?  How about "0xfd"?
you can not create LVM/SW-RAID
you can make LVM over SW-RAID or SW-RAID over LVM

> Thanks in advance,
>
> Bo
>
> -----------------raidtab------------
> raiddev /dev/md0
>        raid-level 0
>        nr-raid-disks 2
>        nr-spare-disks 0
>        chunk-size 4
>        persistent-superblock 1
>        device     /dev/hdb1
>        raid-disk 0
>        device     /dev/hdc1
>        raid-disk 1
>
> raiddev /dev/md1
>        raid-level 1
>        nr-raid-disks 2
>        nr-spare-disks 0
>        chunk-size 4
>        persistent-superblock 1
>        device     /dev/hdb2
>        raid-disk 0
>        device     /dev/hdc2
>        raid-disk 1
>
> raiddev /dev/md2
>        raid-level 1
>        nr-raid-disks 2
>        nr-spare-disks 0
>        chunk-size 4
>        persistent-superblock 1
>        device     /dev/hdb3
>        raid-disk 0
>        device     /dev/hdc3
>        raid-disk 1
that is OK
but /dev/hda[1-3] and /dev/hdb[1-3] should be SW-RAID ( partition id)

and then
pvcreate  /dev/md0 /dev/md1 /dev/md2
vgcreate
.........

good luck