From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx3.redhat.com (mx3.redhat.com [172.16.48.32]) by int-mx1.corp.redhat.com (8.13.1/8.13.1) with ESMTP id m32K27Fs017257 for ; Wed, 2 Apr 2008 16:02:07 -0400 Received: from nf-out-0910.google.com (nf-out-0910.google.com [64.233.182.191]) by mx3.redhat.com (8.13.8/8.13.8) with ESMTP id m32K1aov031784 for ; Wed, 2 Apr 2008 16:01:36 -0400 Received: by nf-out-0910.google.com with SMTP id g13so1242523nfb.21 for ; Wed, 02 Apr 2008 13:01:35 -0700 (PDT) Message-ID: <676847c60804021301p35332980l2f80f52864f139ba@mail.gmail.com> Date: Wed, 2 Apr 2008 15:01:35 -0500 From: "Koree A. Smith" MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_1147_32901439.1207166495300" Subject: [linux-lvm] UUID Issue Reply-To: LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , List-Id: To: linux-lvm@redhat.com ------=_Part_1147_32901439.1207166495300 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline I am having the same issue as this previous post to the lvm list, but cannot find if anyone ever had a solution for it: *Author: *Tommaso Cecchi *Date: *2006-07-19 11:352006-07-19 16:35 -500UTC *To: *LVM general discussion and development *Old-Topics: *RE: [linux-lvm] "pvchange --uuid" failed when PV is in use *Subject: *[linux-lvm] duplicate PV Hello everyone, I have the following problem: I want to use a snapshot mechanism external to LVM2 (i.e. snapshot from the storage server) so it happens that I access from a linux box two identical LUNs with the same PVID. It is not a matter of multipathing, they just are completely different devices with the same content (and with the same PVID of course). What I would like to do is to use and mount the second device on a different mount point. So: /dev/sdd1 is the primary PV /dev/sdf1 is the snapshot of the primary PV The result of pvscan before the discovery is: drdb2:~ # pvscan PV /dev/sde1 VG drrg2_vg lvm2 [200.00 GB / 0 free] PV /dev/sdd1 VG test_vg lvm2 [200.00 GB / 0 free] PV /dev/sdb1 VG oracledb_vg lvm2 [220.00 GB / 0 free] PV /dev/sdc1 VG oracledb_vg lvm2 [20.00 GB / 0 free] PV /dev/sda3 VG root_vg lvm2 [59.75 GB / 47.26 GB free] Total: 5 [699.73 GB] / in use: 5 [699.73 GB] / in no VG: 0 [0 ] after the discovery of the new device is: drdb2:~ # pvscan Found duplicate PV PnvnzL7YFft76Ky0EaPbOh519SQD5Uxc: using /dev/sdf1 not /dev/sdd1 PV /dev/sde1 VG drrg2_vg lvm2 [200.00 GB / 0 free] PV /dev/sdd1 VG test_vg lvm2 [200.00 GB / 0 free] PV /dev/sdb1 VG oracledb_vg lvm2 [220.00 GB / 0 free] PV /dev/sdc1 VG oracledb_vg lvm2 [20.00 GB / 0 free] PV /dev/sda3 VG root_vg lvm2 [59.75 GB / 47.26 GB free] Total: 5 [699.73 GB] / in use: 5 [699.73 GB] / in no VG: 0 [0 ] I guess this problem is the same I'd have if I copy any single byte from a device to another the last one resulting in having the same LVM label. What I tried is to: 1) vgreduce: drdb2:~ # vgreduce test_vg /dev/sdf1 Found duplicate PV PnvnzL7YFft76Ky0EaPbOh519SQD5Uxc: using /dev/sdf1 not /dev/sdd1 Physical Volume "/dev/sdf1" not found in Volume Group "test_vg" sdf1 does not belong to test_vg 2) pvchange --uuid: drdb2:~ # pvchange --uuid /dev/sdf1 Found duplicate PV PnvnzL7YFft76Ky0EaPbOh519SQD5Uxc: using /dev/sdd1 not /dev/sdf1 Volume group containing /dev/sdf1 has active logical volumes 0 physical volumes changed / 1 physical volume not changed My idea was to modify the PVID so to let LVM understand they are completely different devices. How can I manage this? Thanks for any help you may give me. Tommaso -- ================================================================ | Tommaso Cecchi CINECA | System Management Group Via Magnanelli 6/3 40033 | e-mail: t.cecchi@??? Casalecchio di Reno | Tel: 051/6171411 Bologna - ITALY | Fax 051/6132198 http://www.cineca.it ================================================================ _______________________________________________ linux-lvm mailing list Any help is greatly appreciated. Thanks! Koree linux-lvm@??? https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ -- Koree A. Smith, RHCE -- koreesmith@gmail.com koree@ameth.org ------=_Part_1147_32901439.1207166495300 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline I am having the same issue as this previous post to the lvm list, but cannot find if anyone ever had a solution for it:

Author: Tommaso Cecchi
Date: 2006-07-19 11:35 -500
To: LVM general discussion and development
Old-Topics: RE: [linux-lvm] "pvchange --uuid" failed when PV is in use
Subject: [linux-lvm] duplicate PV
Hello everyone,
I have the following problem: I want to use a snapshot mechanism external to
LVM2 (i.e. snapshot from the storage server) so it happens that I access from a
linux box two identical LUNs with the same PVID. It is not a matter of
multipathing, they just are completely different devices with the same content
(and with the same PVID of course).

What I would like to do is to use and mount the second device on a different
mount point. So:

/dev/sdd1 is the primary PV
/dev/sdf1 is the snapshot of the primary PV

The result of pvscan before the discovery is:

drdb2:~ # pvscan
PV /dev/sde1 VG drrg2_vg lvm2 [200.00 GB / 0 free]
PV /dev/sdd1 VG test_vg lvm2 [200.00 GB / 0 free]
PV /dev/sdb1 VG oracledb_vg lvm2 [220.00 GB / 0 free]
PV /dev/sdc1 VG oracledb_vg lvm2 [20.00 GB / 0 free]
PV /dev/sda3 VG root_vg lvm2 [59.75 GB / 47.26 GB free]
Total: 5 [699.73 GB] / in use: 5 [699.73 GB] / in no VG: 0 [0 ]

after the discovery of the new device is:

drdb2:~ # pvscan
Found duplicate PV PnvnzL7YFft76Ky0EaPbOh519SQD5Uxc: using /dev/sdf1 not
/dev/sdd1
PV /dev/sde1 VG drrg2_vg lvm2 [200.00 GB / 0 free]
PV /dev/sdd1 VG test_vg lvm2 [200.00 GB / 0 free]
PV /dev/sdb1 VG oracledb_vg lvm2 [220.00 GB / 0 free]
PV /dev/sdc1 VG oracledb_vg lvm2 [20.00 GB / 0 free]
PV /dev/sda3 VG root_vg lvm2 [59.75 GB / 47.26 GB free]
Total: 5 [699.73 GB] / in use: 5 [699.73 GB] / in no VG: 0 [0 ]

I guess this problem is the same I'd have if I copy any single byte from a
device to another the last one resulting in having the same LVM label.

What I tried is to:

1) vgreduce:

drdb2:~ # vgreduce test_vg /dev/sdf1
Found duplicate PV PnvnzL7YFft76Ky0EaPbOh519SQD5Uxc: using /dev/sdf1 not
/dev/sdd1
Physical Volume "/dev/sdf1" not found in Volume Group "test_vg"

sdf1 does not belong to test_vg

2) pvchange --uuid:

drdb2:~ # pvchange --uuid /dev/sdf1
Found duplicate PV PnvnzL7YFft76Ky0EaPbOh519SQD5Uxc: using /dev/sdd1 not
/dev/sdf1
Volume group containing /dev/sdf1 has active logical volumes
0 physical volumes changed / 1 physical volume not changed

My idea was to modify the PVID so to let LVM understand they are completely
different devices.
How can I manage this?

Thanks for any help you may give me.
Tommaso 

-- 
================================================================
|     Tommaso Cecchi                          CINECA
| System Management Group              Via Magnanelli 6/3 40033

| e-mail: t.cecchi@???             Casalecchio di Reno
| Tel: 051/6171411                         Bologna - ITALY
| Fax 051/6132198                       http://www.cineca.it

================================================================


_______________________________________________
linux-lvm mailing list

Any help is greatly appreciated.

Thanks!

Koree
linux-lvm@???
https://www.redhat.com/mailman/listinfo/linux-lvm

read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/


--
Koree A. Smith, RHCE
--
koreesmith@gmail.com
koree@ameth.org ------=_Part_1147_32901439.1207166495300--