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duplicate PV error with 2.6.1 and lvm2

linux-lvm David Powers 2 participants 3 messages Jan 30, 2004 – Jan 31, 2004

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I am attempting to create a simple volume on a soft raid 1 device (/dev/md1) on a gentoo linux box running 2.6.1. The pvcreate seems to go fine but when I then attempt to create the volume group I get an odd error about duplicate PV's. It seems as if the code is sometimes treating the device as a single device and sometimes seeing the underlying disks. Any help would be appreciated.

disk1 root # cat /proc/mdstat
Personalities : [raid1]
md1 : active raid1 sdb1[1] sda1[0]

     244179840 blocks [2/2] [UU]

md0 : active raid1 hdg3[1] hde3[0]

     76035520 blocks [2/2] [UU]

unused devices: <none>
disk1 root # pvcreate /dev/md1
Physical volume "/dev/md1" successfully created
disk1 root # vgcreate filestore /dev/md1
Found duplicate PV 5c5olnVSu9cpsAmJ6trmPopx1Hv4ZGv4: using /dev/sdb1
not /dev/sda1
Found duplicate PV 5c5olnVSu9cpsAmJ6trmPopx1Hv4ZGv4: using /dev/sdb1
not /dev/sda1
Found duplicate PV 5c5olnVSu9cpsAmJ6trmPopx1Hv4ZGv4: using /dev/sdb1
not /dev/sda1
Volume group "filestore" successfully created

-David Powers

#1 lore raw
Quoted 2 lines · David Powers

I am attempting to create a simple volume on a soft raid 1 device (/dev/md1) on a gentoo linux box running 2.6.1. The pvcreate seems to go fine but when I then attempt to create the volume group I get an odd error about duplicate PV's. It seems as if the code is sometimes treating the device as a single device and sometimes seeing the underlying disks. Any help would be appreciated.

either modify /etc/lvm/lvm.conf in order to ignore the devices that are part of your md array or look at the patch i posted to this list under the subject: "[patch] lvm2 and md component devices"

L.

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Luca Berra -- [email protected]
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#2 lore raw

Re: [linux-lvm] duplicate PV error with 2.6.1 and lvm2 - resolved

That worked like a charm - thank you very much. I added:

devices { filter=["r|sd[a-z]|"] } to /etc/lvm/lvm.conf (to ignore /dev/sda and /dev/sdb) and everything else fell into place.

-David Powers

Quoted 10 lines · Luca Berra
Quoted 2 lines · David Powers

I am attempting to create a simple volume on a soft raid 1 device (/dev/md1) on a gentoo linux box running 2.6.1. The pvcreate seems to go fine but when I then attempt to create the volume group I get an odd error about duplicate PV's. It seems as if the code is sometimes treating the device as a single device and sometimes seeing the underlying disks. Any help would be appreciated.

either modify /etc/lvm/lvm.conf in order to ignore the devices that are part of your md array or look at the patch i posted to this list under the subject: "[patch] lvm2 and md component devices"

L.