<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> <HTML> <HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=US-ASCII"> <META NAME="Generator" CONTENT="MS Exchange Server version 5.5.2658.2"> <TITLE>How to import a mirror of a volume group</TITLE> </HEAD> <BODY> Hi, I am trying to figure out how to import a mirror of a volume group to a host where the mirror is visible. I am new to LVM. Any help will be appreciated. The system is RedHat Enterprise Linux 3.0. The kernel is 2.4.21-4. The LVM version 1.0.3-15. Let me explain what I am trying to do. 1. I created a volume group which consists of 2 physical volumes (2 full hard disks) and 2 logical volumes. I created two ext3 file systems off the two logical volumes. I mounted the two file systems. Everything was ok. 2. I created mirror disks of the two original physical volumes, which should be the exact copy of the original two physical volumes, using our own array technology. 3. Now I want to import the volume group from the two mirror disks on the same host (The two mirror disks are visible on the same host). I got the following error: "vgimport -- ERROR "pv_read(): read" reading physical volume "/dev/sdbm"" Importing to a different host where the mirror disks are visible does not work either. Same error. I have attached the vgimport output with debug option turned on at the end of this email. Since the mirror disks are the exact copy of the originals, I would assume that VGDA should be copied to the mirror disks as well. Why import does not work? Did I miss anything here? Is there other workaround that can help me achieve this? Thanks, Jie Below is the output with debug option turned on. <1> lvm_get_iop_version -- CALLED <22> lvm_check_special -- CALLED <22> lvm_check_special -- LEAVING <1> lvm_get_iop_version -- AFTER ioctl ret: 0 <1> lvm_get_iop_version -- LEAVING with ret: 10 vgimport -- locking logical volume manager <1> lvm_lock -- CALLED <22> lvm_check_special -- CALLED <22> lvm_check_special -- LEAVING <1> lvm_lock -- LEAVING with ret: 0 vgimport -- checking volume group name <1> vg_check_name -- CALLED with VG: jlin_vg2 <22> lvm_check_chars -- CALLED with name: "jlin_vg2" <22> lvm_check_chars -- LEAVING with ret: 0 <1> vg_check_name -- LEAVING with ret: 0 vgimport -- checking volume group "jlin_vg2" existence <1> lvm_tab_vg_check_exist -- CALLED with vg_name: "jlin_vg2" <22> vg_check_name -- CALLED with VG: jlin_vg2 <333> lvm_check_chars -- CALLED with name: "jlin_vg2" <333> lvm_check_chars -- LEAVING with ret: 0 <22> vg_check_name -- LEAVING with ret: 0 <22> lvm_tab_read -- CALLED <22> lvm_tab_read -- LEAVING with ret: 0 data: 804CA98 size: 9 <1> lvm_tab_vg_check_exist -- LEAVING with ret: 0 vgimport -- trying to read physical volumes vgimport -- checking for duplicate physical volumes vgimport -- checking physical volume name "/dev/sdbm" <1> pv_check_name -- CALLED with "/dev/sdbm" <22> lvm_check_chars -- CALLED with name: "/dev/sdbm" <22> lvm_check_chars -- LEAVING with ret: 0 <1> pv_check_name -- LEAVING with ret: 0 vgimport -- reading data of physical volume "/dev/sdbm" from disk <1> pv_read -- CALLED with /dev/sdbm <22> pv_check_name -- CALLED with "/dev/sdbm" <333> lvm_check_chars -- CALLED with name: "/dev/sdbm" <333> lvm_check_chars -- LEAVING with ret: 0 <22> pv_check_name -- LEAVING with ret: 0 <1> pv_read -- going to read /dev/sdbm <1> pv_read -- LEAVING with ret: -282 <1> lvm_error -- CALLED with: -282 <1> lvm_error -- LEAVING with: "pv_read(): read" vgimport -- ERROR "pv_read(): read" reading physical volume "/dev/sdbm" <1> lvm_unlock -- CALLED <1> lvm_unlock -- LEAVING with ret: 0 </BODY> </HTML>