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Date: Fri, 16 Jun 2006 04:14:07 +0100
From: "C'est Pierre" <cestpierre@gmail.com>
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Subject: [linux-lvm] LVM and Device Mapper
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To: LVM general discussion and development <linux-lvm@redhat.com>

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