rebuild lvm after lost boot disk

[bitsofme]

Hi All,

I have a 4 HDD system.
The first disk (160G) is my boot system.
The three other disks make up a LVM each disk is 2TB. No striping just 3 disks as one big disk.

During my upgrade to F17 I cocked up my boot disk.

I found some information on using dd to help recreate a config file for the lvm disks. and assembled this

 # Generated by LVM2 version 2.02.95(2) (2012-03-06): Mon Jun  4 17:01:30 2012

contents = "Text Format Volume Group"
version = 1

description = ""

creation_host = "(none)"	# Linux (none) 3.3.4-5.fc17.x86_64 #1 SMP Mon May 7 17:29:34 UTC 2012 x86_64
creation_time = 1338829290	# Mon Jun  4 17:01:30 2012

vg_main2 {
	id = "OBZT6E-tzAO-v80A-kN38-R1Uo-3GRI-dXd4wj"
	seqno = 13
	format = "lvm2" # informational
	status = ["RESIZEABLE", "READ", "WRITE"]
	flags = []
	extent_size = 8192
	max_lv = 256
	max_pv = 256
	metadata_copies = 0

	physical_volumes {

		pv0 {
			id = "PCNHHY-LSvJ-jKbt-TXbN-tceZ-0GPe-tshRED"
			device = "/dev/sdb"

			status = ["ALLOCATABLE"]
			flags = []
			dev_size = 3907029168
			pe_start = 384
			pe_count = 476932
		}

		pv1 {
			id = "h8j1UC-Uckf-Ob3w-UTea-nUfT-JPWc-sVdjeF"
			device = "/dev/sdc"

			status = ["ALLOCATABLE"]
			flags = []
			dev_size = 3907029168
			pe_start = 384
			pe_count = 476932
		}

		pv2 {
			id = "Ixsun3-rGKx-0xWB-tqFK-RDYq-OuNR-qIj5sO"
			device = "/dev/sda"

			status = ["ALLOCATABLE"]
			flags = []
			dev_size = 3907029168
			pe_start = 2048
			pe_count = 476932
		}
	}

	logical_volumes {

		big	{
			id = "ptLLIA-nQhQ-JsBQ-wur0-fejd-wV4E-Xj1PyR"
			status = ["READ", "WRITE", "VISIBLE"]
			flags = []
			segment_count = 1

			segment1 {
				start_extent = 0
				extent_count = 953864

				type = "striped"
				stripe_count = 1
				stripe_size = 8

				stripes = [
					"pv0", 0,
					"pv2", 0
				]
			}
		}
	}
}

how do I get fedora to see this configuration and use it?

---------- Post added at 09:50 PM ---------- Previous post was at 07:17 PM ----------

Just so all the information is available

blkid
/dev/sdc: UUID="h8j1UC-Uckf-Ob3w-UTea-nUfT-JPWc-sVdjeF" TYPE="LVM2_member"
/dev/mapper/vg_main-lv_swap: UUID="576e853f-1064-4b22-aaf1-89eca9111913" TYPE="swap"
/dev/mapper/vg_main-lv_root: LABEL="_Fedora-17-x86_6" UUID="61736f39-b25a-49a4-85cd-8eda8e8e9e64" TYPE="ext4"
/dev/mapper/vg_main-lv_home: UUID="baef8ad2-deda-4f0c-974c-a92638c2eeb9" TYPE="ext4"
/dev/sdd1: UUID="86f1da31-0a91-40c1-b151-8650e0d2a497" TYPE="ext4"
/dev/sdd2: UUID="92UeWo-GcG7-CDbL-d2gz-Zeri-sA0j-1re3rQ" TYPE="LVM2_member"

sda,sdb,sdc = 2TB

sdd = 160G
sdd1 = /boot 524M
sdd2 = 160G lvm2 pv


pvscan
PV /dev/sdd2 VG vg_main lvm2 [148.53 GiB / 0 free]
PV /dev/sdc lvm2 [1.82 TiB]
Total: 2 [1.96 TiB] / in use: 1 [148.53 GiB] / in no VG: 1 [1.82 TiB]

[george_toolan]

I don't have a clue, but these are only two of your three drives:

stripes = [
"pv0", 0,
"pv2", 0
]

[bitsofme]

Thanks for that I am not sure what all the options in the lvm config file mean guess I will have to hit the books and learn more about lvm.

Just as I typed this I found a blog that mentioned the command vgcfgrestore and looked at the man page and ran it with the -t switch for test and got the following

Test mode: Metadata will NOT be updated and volumes will not be (de)activated.
Couldn't find device with uuid PCNHHY-LSvJ-jKbt-TXbN-tceZ-0GPe-tshRED.
Couldn't find device with uuid Ixsun3-rGKx-0xWB-tqFK-RDYq-OuNR-qIj5sO.
Segment with extent 953864 in PV unknown device not found
Couldn't read all logical volumes for volume group vg_big.
Restore failed.

so looks like I need to assign uuids to the disks to match the config file

Thanks

[bitsofme]

Anyone any idea on how I set the uuid without damaging the partition?