> Also, found a backup of /etc/lvm from first machine.
That metadata is (by default) stored on every PV (disk),
so the backup is only needed if you accidentally change
something and need to put it back the way it was.
On Fri, 14 Jan 2011 13:41:17 -0600
Albert Everett <aeeverett@ualr.edu> wrote:
> Also, found a backup of /etc/lvm from first machine.
>
> Albert
>
> [root@login-0-0 lvm]# ls -R
> .:
> archive backup lvm.conf
>
> ./archive:
> vg0_00000.vg vg0_00001.vg vg0_00002.vg vg0_00003.vg vg1_00000.vg
> vg1_00001.vg
>
> ./backup:
> vg0 vg1
>
> [root@login-0-0 lvm]# cat backup/vg0
> # Generated by LVM2: Tue Jan 20 12:42:14 2009
>
> contents = "Text Format Volume Group"
> version = 1
>
> description = "Created *after* executing 'lvcreate -l 26772 -n
> lv0 /dev/vg0'"
>
> creation_host = "whatever" # Linux whatever 2.6.9-55.0.2.ELsmp
> #1 SMP Tue Jun 26 14:14:47 EDT 2007 x86_64 creation_time =
> 1232476934 # Tue Jan 20 12:42:14 2009
>
> vg0 {
> id = "DlYlrX-oFu7-S3rf-GVH0-5sVp-cuQh-0VGIdy"
> seqno = 4
> status = ["RESIZEABLE", "READ", "WRITE"]
> extent_size = 262144 # 128 Megabytes
> max_lv = 0
> max_pv = 0
>
> physical_volumes {
>
> pv0 {
> id = "aX4eXc-5ADq-BTl2-sZzY-36kX-A0zx-bDKIQf"
> device = "/dev/sdc1" # Hint only
>
> status = ["ALLOCATABLE"]
> dev_size = 18446744073709551615 # 8
> (null) pe_start = 384
> pe_count = 13386 # 1.63403 Terabytes
> }
>
> pv1 {
> id = "fgu78M-yzS9-OPbV-2aXt-NgJP-A6dA-ZpQCkt"
> device = "/dev/sdd1" # Hint only
>
> status = ["ALLOCATABLE"]
> dev_size = 18446744073709551615 # 8
> (null) pe_start = 384
> pe_count = 13386 # 1.63403 Terabytes
> }
> }
>
> logical_volumes {
>
> lv0 {
> id = "fOvYHo-jj3e-qoZK-nvU8-7yu3-z19U-siuqOP"
> status = ["READ", "WRITE", "VISIBLE"]
> segment_count = 2
>
> segment1 {
> start_extent = 0
> extent_count = 13386 # 1.63403
> Terabytes
>
> type = "striped"
> stripe_count = 1 # linear
>
> stripes = [
> "pv0", 0
> ]
> }
> segment2 {
> start_extent = 13386
> extent_count = 13386 # 1.63403
> Terabytes
>
> type = "striped"
> stripe_count = 1 # linear
>
> stripes = [
> "pv1", 0
> ]
> }
> }
> }
> }
>
> [root@login-0-0 lvm]# cat backup/vg1
> # Generated by LVM2: Fri Jan 16 11:30:34 2009
>
> contents = "Text Format Volume Group"
> version = 1
>
> description = "Created *after* executing 'lvcreate -L 4.72T -n
> lv1 /dev/vg1'"
>
> creation_host = "whatever" # Linux whatever 2.6.9-55.0.2.ELsmp
> #1 SMP Tue Jun 26 14:14:47 EDT 2007 x86_64 creation_time =
> 1232127034 # Fri Jan 16 11:30:34 2009
>
> vg1 {
> id = "Qjb9Fq-o5Jy-MH1n-453l-gQqp-iqqN-49sUIS"
> seqno = 2
> status = ["RESIZEABLE", "READ", "WRITE"]
> extent_size = 262144 # 128 Megabytes
> max_lv = 0
> max_pv = 0
>
> physical_volumes {
>
> pv0 {
> id = "VSTyo3-r8rE-5lym-G6F7-683r-fdZm-Urm5af"
> device = "/dev/sde1" # Hint only
>
> status = ["ALLOCATABLE"]
> dev_size = 18446744073684372087 # 8
> (null) pe_start = 384
> pe_count = 16287 # 1.98816 Terabytes
> }
>
> pv1 {
> id = "eXd2Ee-L55A-bO43-ucXR-GnGM-n4fo-k0vOXP"
> device = "/dev/sdf1" # Hint only
>
> status = ["ALLOCATABLE"]
> dev_size = 18446744073684372087 # 8
> (null) pe_start = 384
> pe_count = 16287 # 1.98816 Terabytes
> }
>
> pv2 {
> id = "4e0pIE-AoXc-2bb5-m6Q9-Eb2z-gmHW-Gu9Owl"
> device = "/dev/sdg1" # Hint only
>
> status = ["ALLOCATABLE"]
> dev_size = 1603013832 # 764.377
> Gigabytes pe_start = 384
> pe_count = 6115 # 764.375 Gigabytes
> }
> }
>
> logical_volumes {
>
> lv1 {
> id = "SNdEg6-nshz-xtzf-ml4R-jraE-ukEZ-eqK6hE"
> status = ["READ", "WRITE", "VISIBLE"]
> segment_count = 3
>
> segment1 {
> start_extent = 0
> extent_count = 16287 # 1.98816
> Terabytes
>
> type = "striped"
> stripe_count = 1 # linear
>
> stripes = [
> "pv0", 0
> ]
> }
> segment2 {
> start_extent = 16287
> extent_count = 16287 # 1.98816
> Terabytes
>
> type = "striped"
> stripe_count = 1 # linear
>
> stripes = [
> "pv1", 0
> ]
> }
> segment3 {
> start_extent = 32574
> extent_count = 6093 # 761.625
> Gigabytes
>
> type = "striped"
> stripe_count = 1 # linear
>
> stripes = [
> "pv2", 0
> ]
> }
> }
> }
> }
>
> Begin forwarded message:
>
> > From: Albert Everett <aeeverett@ualr.edu>
> > Date: January 14, 2011 1:25:24 PM CST
> > To: linux-lvm@redhat.com
> > Subject: moving LVMs to another machine
> >
> > This is my first time trying to do this, so please forgive me if
> > what I'm asking is trivial. I'm anxious not to loose data.
> >
> > I have moved a Dell MD3000 with an MD1000 attached from one CentOS
> > 4.5 x86_64 machine to another. I've installed Dell's drivers on the
> > second machine and I see output below.
> >
> > /dev/sdb and sdc are on the MD3000; /dev/sdd, sde and sdf are on
> > the MD1000. Filesystem on both is ext3, and I only used LVM to
> > concatenate <2TB volumes because the MD3000 firmware required it at
> > the time.
> >
> > I did not actively deactivate any volume groups or logical volumes
> > before I made this move.
> >
> > Q: What are my next steps after lvscan to bring the two logical
> > volumes back online? OS, etc are all on /dev/sda; the logical
> > volumes just have extra stuff.
> >
> > Q: Am I right to assume that once lv0 and lv1 show as active, all I
> > need to do is mount them somewhere, and that the filesystems they
> > contain should be intact? I had no disk or controller failures that
> > I know of.
> >
> > Albert
> >
> > [root@login-0-0 ~]# fdisk -l
> >
> > Disk /dev/sda: 749.6 GB, 749606010880 bytes
> > 255 heads, 63 sectors/track, 91134 cylinders
> > Units = cylinders of 16065 * 512 = 8225280 bytes
> >
> > Device Boot Start End Blocks Id System
> > /dev/sda1 * 1 3060 24579418+ 83 Linux
> > /dev/sda2 3061 6120 24579450 83 Linux
> > /dev/sda3 6121 8160 16386300 82 Linux swap
> > /dev/sda4 8161 91134 666488655 5 Extended
> > /dev/sda5 8161 91134 666488623+ 83 Linux
> >
> > Disk /dev/sdb: 1796.7 GB, 1796776919040 bytes
> > 255 heads, 63 sectors/track, 218445 cylinders
> > Units = cylinders of 16065 * 512 = 8225280 bytes
> >
> > Device Boot Start End Blocks Id System
> > /dev/sdb1 1 218445 1754659431 8e Linux LVM
> >
> > Disk /dev/sdc: 1796.7 GB, 1796776919040 bytes
> > 255 heads, 63 sectors/track, 218445 cylinders
> > Units = cylinders of 16065 * 512 = 8225280 bytes
> >
> > Device Boot Start End Blocks Id System
> > /dev/sdc1 1 218445 1754659431 8e Linux LVM
> >
> > Disk /dev/sdd: 2186.1 GB, 2186136256512 bytes
> > 255 heads, 63 sectors/track, 265782 cylinders
> > Units = cylinders of 16065 * 512 = 8225280 bytes
> >
> > Device Boot Start End Blocks Id System
> > /dev/sdd1 1 265782 2134893883+ 8e Linux LVM
> >
> > Disk /dev/sde: 2186.1 GB, 2186136256512 bytes
> > 255 heads, 63 sectors/track, 265782 cylinders
> > Units = cylinders of 16065 * 512 = 8225280 bytes
> >
> > Device Boot Start End Blocks Id System
> > /dev/sde1 1 265782 2134893883+ 8e Linux LVM
> >
> > Disk /dev/sdf: 820.7 GB, 820745076736 bytes
> > 255 heads, 63 sectors/track, 99783 cylinders
> > Units = cylinders of 16065 * 512 = 8225280 bytes
> >
> > Device Boot Start End Blocks Id System
> > /dev/sdf1 1 99783 801506916 8e Linux LVM
> >
> > [root@login-0-0 ~]# pvscan
> > PV /dev/sdd1 VG vg1 lvm2 [1.99 TB / 0 free]
> > PV /dev/sde1 VG vg1 lvm2 [1.99 TB / 0 free]
> > PV /dev/sdf1 VG vg1 lvm2 [764.38 GB / 2.75 GB free]
> > PV /dev/sdb1 VG vg0 lvm2 [1.63 TB / 0 free]
> > PV /dev/sdc1 VG vg0 lvm2 [1.63 TB / 0 free]
> > Total: 5 [7.99 TB] / in use: 5 [7.99 TB] / in no VG: 0 [0 ]
> >
> > [root@login-0-0 ~]# vgscan
> > Reading all physical volumes. This may take a while...
> > Found volume group "vg1" using metadata type lvm2
> > Found volume group "vg0" using metadata type lvm2
> >
> > [root@login-0-0 ~]# lvscan
> > inactive '/dev/vg1/lv1' [4.72 TB] inherit
> > inactive '/dev/vg0/lv0' [3.27 TB] inherit
> >
> > [root@login-0-0 ~]# pvdisplay
> > --- Physical volume ---
> > PV Name /dev/sdd1
> > VG Name vg1
> > PV Size 8192.00 EB / not usable 8192.00 EB
> > Allocatable yes (but full)
> > PE Size (KByte) 131072
> > Total PE 16287
> > Free PE 0
> > Allocated PE 16287
> > PV UUID VSTyo3-r8rE-5lym-G6F7-683r-fdZm-Urm5af
> >
> > --- Physical volume ---
> > PV Name /dev/sde1
> > VG Name vg1
> > PV Size 8192.00 EB / not usable 8192.00 EB
> > Allocatable yes (but full)
> > PE Size (KByte) 131072
> > Total PE 16287
> > Free PE 0
> > Allocated PE 16287
> > PV UUID eXd2Ee-L55A-bO43-ucXR-GnGM-n4fo-k0vOXP
> >
> > --- Physical volume ---
> > PV Name /dev/sdf1
> > VG Name vg1
> > PV Size 764.38 GB / not usable 1.60 MB
> > Allocatable yes
> > PE Size (KByte) 131072
> > Total PE 6115
> > Free PE 22
> > Allocated PE 6093
> > PV UUID 4e0pIE-AoXc-2bb5-m6Q9-Eb2z-gmHW-Gu9Owl
> >
> > --- Physical volume ---
> > PV Name /dev/sdb1
> > VG Name vg0
> > PV Size 8192.00 EB / not usable 8192.00 EB
> > Allocatable yes (but full)
> > PE Size (KByte) 131072
> > Total PE 13386
> > Free PE 0
> > Allocated PE 13386
> > PV UUID aX4eXc-5ADq-BTl2-sZzY-36kX-A0zx-bDKIQf
> >
> > --- Physical volume ---
> > PV Name /dev/sdc1
> > VG Name vg0
> > PV Size 8192.00 EB / not usable 8192.00 EB
> > Allocatable yes (but full)
> > PE Size (KByte) 131072
> > Total PE 13386
> > Free PE 0
> > Allocated PE 13386
> > PV UUID fgu78M-yzS9-OPbV-2aXt-NgJP-A6dA-ZpQCkt
> >
> > [root@login-0-0 ~]# vgdisplay
> > --- Volume group ---
> > VG Name vg1
> > System ID
> > Format lvm2
> > Metadata Areas 3
> > Metadata Sequence No 2
> > VG Access read/write
> > VG Status resizable
> > MAX LV 0
> > Cur LV 1
> > Open LV 0
> > Max PV 0
> > Cur PV 3
> > Act PV 3
> > VG Size 4.72 TB
> > PE Size 128.00 MB
> > Total PE 38689
> > Alloc PE / Size 38667 / 4.72 TB
> > Free PE / Size 22 / 2.75 GB
> > VG UUID Qjb9Fq-o5Jy-MH1n-453l-gQqp-iqqN-49sUIS
> >
> > --- Volume group ---
> > VG Name vg0
> > System ID
> > Format lvm2
> > Metadata Areas 2
> > Metadata Sequence No 4
> > VG Access read/write
> > VG Status resizable
> > MAX LV 0
> > Cur LV 1
> > Open LV 0
> > Max PV 0
> > Cur PV 2
> > Act PV 2
> > VG Size 3.27 TB
> > PE Size 128.00 MB
> > Total PE 26772
> > Alloc PE / Size 26772 / 3.27 TB
> > Free PE / Size 0 / 0
> > VG UUID DlYlrX-oFu7-S3rf-GVH0-5sVp-cuQh-0VGIdy
> >
> > [root@login-0-0 ~]# lvdisplay
> > --- Logical volume ---
> > LV Name /dev/vg1/lv1
> > VG Name vg1
> > LV UUID SNdEg6-nshz-xtzf-ml4R-jraE-ukEZ-eqK6hE
> > LV Write Access read/write
> > LV Status NOT available
> > LV Size 4.72 TB
> > Current LE 38667
> > Segments 3
> > Allocation inherit
> > Read ahead sectors 0
> >
> > --- Logical volume ---
> > LV Name /dev/vg0/lv0
> > VG Name vg0
> > LV UUID fOvYHo-jj3e-qoZK-nvU8-7yu3-z19U-siuqOP
> > LV Write Access read/write
> > LV Status NOT available
> > LV Size 3.27 TB
> > Current LE 26772
> > Segments 2
> > Allocation inherit
> > Read ahead sectors 0
> >
>
>
> _______________________________________________
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> https://www.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>
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