Hello,
I've setup multipath with multipath-tools and I guess everything is K
there. However, I can't get lvm to recognize the multipath'ed devices:
# dmsetup ls
(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 /
Disk / 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
/ 1
1 1008 83 Linux
/ 2
51200 52427776 8e Linux LVM
# pvcreate /dev/dm-3p2
Device /dev/dm-3p2 not found.
# pvcreate /
Device / 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
linux-lvm mailing list
linux-lvm (AT) redhat (DOT) com
read the LVM HW-T at http://tldp.org/HWT/LVM-HWT/

6/16/06, Kelly Sauke <ksauke (AT) fastenal (DOT) comwrote:
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.

Hello Kelly,

That kinda worked out. I tried your example as-is, and it still shows
'Found duplicate PV' messages and additionally it said "vg sucessfully
created" but in fact, when I issue a vgdisplay, it doesn't show the vg
created.

As soon as I changed from types = [ "device-mapper", 1 ] to types = [
"device-mapper", 16 ] as stated on lvm.conf's man page, the vgdisplay
command recognized the VG clusterfs. Soon after I tried to create a LV
on the VG clusterfs and it doesn't create the /dev/clusterfs/.* but it
does create /dev/mapper/clusterfs-ora1, however, I looked around and
found the util 'vgmknodes' and that seemed to create, however, I am
not still able to create a filesystem on it and the "Found duplicate
PV" messages still appear. Here's the output:
# vgdisplay
Found duplicate PV using /dev/dm-5
not /dev/sda2
Found duplicate PV using
/dev/dm-3p2 not /dev/sda2
Found duplicate PV using /dev/sdb2
not /dev/sda2
(erased the other VG)
Volume group
VG Name clusterfs
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 2
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 1
LV 0
Max PV 0
Cur PV 1
Act PV 1
VG Size 50.00 GB
PE Size 4.00 MB
Total PE 12799
Alloc PE / Size 25 / 100.00 MB
Free PE / Size 12774 / 49.90 GB
VG UUID

# lvdisplay
(skipped the others)
Logical volume
LV Name /dev/clusterfs/ora1
VG Name clusterfs
LV UUID
LV Write Access read/write
LV Status available
# open 0
LV Size 100.00 MB
Current LE 25
Segments 1
Allocation inherit
Read ahead sectors 0
Block device 253:8

# mkfs.ext3 /dev/clusterfs/ora1
mke2fs 1.38 (30-Jun-2005)
mkfs.ext3: Device size reported to be zero. Invalid partition specified, or
partition table wasn't reread after running fdisk, due to
a modified partition being busy and in use. You may need to reboot
to re-read your partition table.

Any more sugestions?

Thank you very much Kelly/Luca

C'est Pierre wrote:
Hello,

I've setup multipath with multipath-tools and I guess everything is K
there. However, I can't get lvm to recognize the multipath'ed devices:

# dmsetup ls
(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 /

Disk / 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
/ 1
1 1008 83 Linux
/ 2
51200 52427776 8e Linux LVM
--
# pvcreate /dev/dm-3p2
Device /dev/dm-3p2 not found.

# pvcreate /
Device / 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

linux-lvm mailing list
linux-lvm (AT) redhat (DOT) com

read the LVM HW-T at http://tldp.org/HWT/LVM-HWT/

C'est Pierre wrote:
6/16/06, Kelly Sauke <ksauke (AT) fastenal (DOT) comwrote:
>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.
>>

Hello Kelly,

That kinda worked out. I tried your example as-is, and it still shows
'Found duplicate PV' messages and additionally it said "vg sucessfully
created" but in fact, when I issue a vgdisplay, it doesn't show the vg
created.

Try excluding all of your sd paths in the filter line. If you look at my
example, it seems my local disk /dev/sda2, my mpath devices and then it hides
everything else. Thats how I got the 'Found duplicate PV' errors to go away.

After setting that, run an lvmdiskscan to verify that its seeing your multipath
devices and excuding the sd devices.

As soon as I changed from types = [ "device-mapper", 1 ] to types = [
"device-mapper", 16 ] as stated on lvm.conf's man page, the vgdisplay
command recognized the VG clusterfs. Soon after I tried to create a LV
on the VG clusterfs and it doesn't create the /dev/clusterfs/.* but it
does create /dev/mapper/clusterfs-ora1, however, I looked around and
found the util 'vgmknodes' and that seemed to create, however, I am
not still able to create a filesystem on it and the "Found duplicate
PV" messages still appear. Here's the output:
# vgdisplay
Found duplicate PV using /dev/dm-5
not /dev/sda2
Found duplicate PV using
/dev/dm-3p2 not /dev/sda2
Found duplicate PV using /dev/sdb2
not /dev/sda2
(erased the other VG)
Volume group
VG Name clusterfs
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 2
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 1
LV 0
Max PV 0
Cur PV 1
Act PV 1
VG Size 50.00 GB
PE Size 4.00 MB
Total PE 12799
Alloc PE / Size 25 / 100.00 MB
Free PE / Size 12774 / 49.90 GB
VG UUID

# lvdisplay
(skipped the others)
Logical volume
LV Name /dev/clusterfs/ora1
VG Name clusterfs
LV UUID
LV Write Access read/write
LV Status available
# open 0
LV Size 100.00 MB
Current LE 25
Segments 1
Allocation inherit
Read ahead sectors 0
Block device 253:8

# mkfs.ext3 /dev/clusterfs/ora1
mke2fs 1.38 (30-Jun-2005)
mkfs.ext3: Device size reported to be zero. Invalid partition
specified, or
partition table wasn't reread after running fdisk, due to
a modified partition being busy and in use. You may need to reboot
to re-read your partition table.

I have no suggestions on this one. I've never encountered this error. It might
be as easy as just deleting the lv and trying again.

Any more sugestions?

Thank you very much Kelly/Luca


>C'est Pierre wrote:
>Hello,
>>
>I've setup multipath with multipath-tools and I guess everything is K
>there. However, I can't get lvm to recognize the multipath'ed devices:
>>
># dmsetup ls
>(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 /
>>
>Disk / 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
>/ 1
>1 1008 83 Linux
>/ 2
>51200 52427776 8e Linux LVM
>>
>>
># pvcreate /dev/dm-3p2
>Device /dev/dm-3p2 not found.
>>
># pvcreate /
>Device / 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
>>

linux-lvm mailing list
linux-lvm (AT) redhat (DOT) com

read the LVM HW-T at http://tldp.org/HWT/LVM-HWT/

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 K
there. However, I can't get lvm to recognize the multipath'ed devices:

# dmsetup ls
(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 /

Disk / 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
/ 1
1 1008 83 Linux
/ 2
51200 52427776 8e Linux LVM

# pvcreate /dev/dm-3p2
Device /dev/dm-3p2 not found.

# pvcreate /
Device / 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

linux-lvm mailing list
linux-lvm (AT) redhat (DOT) com

read the LVM HW-T at http://tldp.org/HWT/LVM-HWT/

linux-lvm mailing list
linux-lvm (AT) redhat (DOT) com

read the LVM HW-T at http://tldp.org/HWT/LVM-HWT/