[linux-lvm] lvm metadata

["Pål Driveklepp" <pald@stud.ntnu.no>]

[-- Attachment #1: Type: text/plain, Size: 2357 bytes --]

hi! i am truly desperate! i messed up my metadata and pvdisplay,
vgdisplay and lvdisplay outputs nothing. all my disks are still
functional and present. i keep getting the error message:

# vgcfgrestore -f main_disk_group_mod3 main_disk_group
 Cannot change metadata for partial volume group main_disk_group
 Restore failed.

i found almost no information about this error message on the web. i
have one backup-file that i am pretty sure is the one i want to backup
(see attachment). it seems /dev/sda's uuid has changed and that is why
i modified it to have the right uuid (hence the "vgcfgrestore -f
main_disk_group_mod3")

lvmdiskscan outputs the following:
  /dev/ram0      [       64.00 MB]
  /dev/sda       [      465.76 GB] LVM physical volume
  /dev/evms/hda1 [        8.99 GB]
  /dev/ram1      [       64.00 MB]
  /dev/hda1      [        8.99 GB]
  /dev/hdc1      [      232.88 GB] LVM physical volume
  /dev/evms/hda5 [      431.40 MB]
  /dev/ram2      [       64.00 MB]
  /dev/evms/hdb1 [      149.05 GB] LVM physical volume
  /dev/ram3      [       64.00 MB]
  /dev/evms/hdc1 [      232.88 GB] LVM physical volume
  /dev/ram4      [       64.00 MB]
  /dev/evms/hdd1 [      186.31 GB]
  /dev/ram5      [       64.00 MB]
  /dev/hda5      [      431.40 MB]
  /dev/ram6      [       64.00 MB]
  /dev/ram7      [       64.00 MB]
  /dev/ram8      [       64.00 MB]
  /dev/ram9      [       64.00 MB]
  /dev/ram10     [       64.00 MB]
  /dev/ram11     [       64.00 MB]
  /dev/ram12     [       64.00 MB]
  /dev/ram13     [       64.00 MB]
  /dev/ram14     [       64.00 MB]
  /dev/ram15     [       64.00 MB]
  /dev/sdb       [      465.76 GB] LVM physical volume
  /dev/hdb1      [      149.05 GB]
  /dev/hdd1      [      186.31 GB]
  0 disks
  23 partitions
  2 LVM physical volume whole disks
  3 LVM physical volumes

disk overview:
/dev/sdb	14AP4R-X75R-94Dx-Pk5g-HU0e-F6yh-8tQoEz	500gig	
(somehow changed to mQYVpB-CCAn-OdlL-Ows5-m33h-gCMy-DWS8ku)
/dev/hdb	kUgW4k-AO0G-qRS0-0cH8-VkzD-Xjfj-ZjzZVL	150gig
/dev/hdc1	JDMxOF-84VA-Ir6e-tAeB-LAKj-gy4J-7GXspF	250gig
/dev/sda	F87gox-1Z8e-eDcZ-QUxW-9gLI-XJLp-ySl017	500gig


Pål Driveklepp
Norway

>  But the error probably means you're attempting to use an incomplete backup
>  (or you attempted hand-editing it incorrectly).
>
>  Alasdair

[-- Attachment #2: main_disk_group_00001.vg --]
[-- Type: application/octet-stream, Size: 2156 bytes --]

# Generated by LVM2: Fri Apr 18 01:30:47 2008

contents = "Text Format Volume Group"
version = 1

description = "Created *before* executing 'vgreduce --removemissing main_disk_group'"

creation_host = "indigo"	# Linux indigo 2.6.20-16-generic #2 SMP Tue Feb 12 05:41:34 UTC 2008 i686
creation_time = 1208475047	# Fri Apr 18 01:30:47 2008

main_disk_group {
	id = "EaYeB6-uFHx-d2p2-TVFl-dyom-fQee-OxXbTF"
	seqno = 8
	status = ["RESIZEABLE", "PARTIAL", "READ"]
	extent_size = 8192		# 4 Megabytes
	max_lv = 0
	max_pv = 0

	physical_volumes {

		pv0 {
			id = "14AP4R-X75R-94Dx-Pk5g-HU0e-F6yh-8tQoEz"
			device = "/dev/sdb"	# Hint only

			status = ["ALLOCATABLE"]
			pe_start = 384
			pe_count = 119234	# 465.758 Gigabytes
		}

		pv1 {
			id = "kUgW4k-AO0G-qRS0-0cH8-VkzD-Xjfj-ZjzZVL"
			device = "unknown device"	# Hint only

			status = ["ALLOCATABLE"]
			pe_start = 384
			pe_count = 38156	# 149.047 Gigabytes
		}

		pv2 {
			id = "JDMxOF-84VA-Ir6e-tAeB-LAKj-gy4J-7GXspF"
			device = "/dev/hdc1"	# Hint only

			status = ["ALLOCATABLE"]
			pe_start = 384
			pe_count = 59618	# 232.883 Gigabytes
		}

		pv3 {
			id = "F87gox-1Z8e-eDcZ-QUxW-9gLI-XJLp-ySl017"
			device = "/dev/sda"	# Hint only

			status = ["ALLOCATABLE"]
			pe_start = 384
			pe_count = 119234	# 465.758 Gigabytes
		}
	}

	logical_volumes {

		diskarray {
			id = "KrYHQE-dQzy-mVsY-CmOj-rN37-O1X7-BD9Adb"
			status = ["READ", "WRITE", "VISIBLE"]
			segment_count = 4

			segment1 {
				start_extent = 0
				extent_count = 119234	# 465.758 Gigabytes

				type = "striped"
				stripe_count = 1	# linear

				stripes = [
					"pv0", 0
				]
			}
			segment2 {
				start_extent = 119234
				extent_count = 38156	# 149.047 Gigabytes

				type = "striped"
				stripe_count = 1	# linear

				stripes = [
					"pv1", 0
				]
			}
			segment3 {
				start_extent = 157390
				extent_count = 59618	# 232.883 Gigabytes

				type = "striped"
				stripe_count = 1	# linear

				stripes = [
					"pv2", 0
				]
			}
			segment4 {
				start_extent = 217008
				extent_count = 118537	# 463.035 Gigabytes

				type = "striped"
				stripe_count = 1	# linear

				stripes = [
					"pv3", 0
				]
			}
		}
	}
}