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Re: [linux-lvm] moving LVMs to another machine



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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