[linux-lvm] LVM and Device Mapper
Kelly Sauke
ksauke at fastenal.com
Fri Jun 16 13:25:36 UTC 2006
Add "a|/dev/mapper/mpath.*|" to the filter= line of your lvm.conf as such.
filter = [ "a|/dev/sda2|", "a|/dev/mapper/mpath.*|", "r/.*/" ]
Then make sure your types= variable has device-mapper in it.
types = [ "device-mapper", 1 ]
That should be all you need.
C'est Pierre wrote:
> Hello,
>
> I've setup multipath with multipath-tools and I guess everything is OK
> there. However, I can't get lvm to recognize the multipath'ed devices:
>
> # dmsetup ls
> 3600508b40010130d00006000011c0000p1 (253, 4)
> system-lv03 (253, 2)
> system-lv01 (253, 1)
> system-lv00 (253, 0)
> dm-3p2 (253, 7)
> dm-3p1 (253, 6)
>
> cabtagdb01:~ # fdisk -l /dev/dm-3
>
> Disk /dev/dm-3: 53.6 GB, 53687091200 bytes
> 64 heads, 32 sectors/track, 51200 cylinders
> Units = cylinders of 2048 * 512 = 1048576 bytes
>
> Device Boot Start End Blocks Id System
> /dev/dm-3p1 1 1 1008 83 Linux
> /dev/dm-3p2 2 51200 52427776 8e Linux LVM
> cabtagdb01:~ # fdisk -l /dev/mapper/3600508b40010130d00006000011c0000
>
> Disk /dev/mapper/3600508b40010130d00006000011c0000: 53.6 GB, 53687091200
> bytes
> 64 heads, 32 sectors/track, 51200 cylinders
> Units = cylinders of 2048 * 512 = 1048576 bytes
>
> Device Boot Start
> End Blocks Id System
> /dev/mapper/3600508b40010130d00006000011c0000p1 1
> 1 1008 83 Linux
> /dev/mapper/3600508b40010130d00006000011c0000p2 2
> 51200 52427776 8e Linux LVM
>
>
> # pvcreate /dev/dm-3p2
> Device /dev/dm-3p2 not found.
>
> # pvcreate /dev/mapper/3600508b40010130d00006000011c0000p2
> Device /dev/mapper/3600508b40010130d00006000011c0000p2 not found.
>
> Does anyone have any guess on what the problem might be? I seem to be
> one-step from getting this solved and I am going through these
> hassles.
>
> Thank you,
> Pierre
>
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> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
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