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[linux-lvm] LVM2: vgcfgrestore lvm behavior



I had originally posted this issue over on the Fedora Forums but it
really belongs here.
---------------

I have an LVM backup stored in a file that now I would like to list
using vgcfgrestore. 
================================================
Under LVM1 all I needed was:
# vgcfgrestore -ll -f /tmp/.mgwork/Volume00.conf
vgcfgrestore -- this is a backup of volume group "Volume00"
--- Volume group ---
VG Name Volume00
VG Access read/write
VG Status NOT available/resizable
VG # 0
MAX LV 256
Cur LV 2
Open LV 0
MAX LV Size 255.99 GB
Max PV 256
Cur PV 1
Act PV 1
VG Size 50.77 GB
PE Size 4 MB
Total PE 12998
Alloc PE / Size 2500 / 9.77 GB
Free PE / Size 10498 / 41.01 GB
VG UUID e8Z7pY-n4os-xpVe-L9V8-t13M-g6RC-xv65cy

--- Logical volume ---
LV Name /dev/Volume00/LogVol00
VG Name Volume00
LV Write Access read/write
LV Status available
LV # 1
# open 0
LV Size 4.88 GB
Current LE 1250
Allocated LE 1250
Allocation next free
Read ahead sectors 10000
Block device 58:1

--- Logical volume ---
LV Name /dev/Volume00/LogVol01
VG Name Volume00
LV Write Access read/write
LV Status available
LV # 2
# open 0
LV Size 4.88 GB
Current LE 1250
Allocated LE 1250
Allocation next free
Read ahead sectors 10000
Block device 58:6


--- Physical volume ---
PV Name /dev/hdc5
VG Name Volume00
PV Size 50.78 GB [106494822 secs] / NOT usable 4.19 MB [LVM: 178 KB]
PV# 1
PV Status available
Allocatable yes
Cur LV 2
PE Size (KByte) 4096
Total PE 12998
Free PE 10498
Allocated PE 2500
PV UUID vC0Rl6-A3u0-RhjN-2B4n-DQEx-llBB-lVTt19

================================================
Under LVM2 when I try this I get this output:
# vgcfgrestore -ll -f /tmp/.mgwork/VolGroup00
Please specify a *single* volume group to restore.
# vgcfgrestore -ll -f /tmp/.mgwork/VolGroup00 -n VolGroup00
Please specify a *single* volume group to restore.
# vgcfgrestore -ll -f /tmp/.mgwork/VolGroup00 VolGroup00

File: /etc/lvm/archive/VolGroup00_00000.vg
VG name: VolGroup00
Description: Created *before* executing 'vgdisplay
--ignorelockingfailure -v VolGroup00'
Backup Time: Sat Oct 28 13:29:00 2006


File: /etc/lvm/backup/VolGroup00
VG name: VolGroup00
Description: Created *after* executing 'vgdisplay
--ignorelockingfailure -v VolGroup00'
Backup Time: Sat Oct 28 13:29:00 2006

Hmm... Ok, but I'm not interested in those files. I'm interested in the
file I declared on the command line with the -f flag.

================================================
as you can see under LVM2 it does not dump the backup VolGroup00 stored
in my backup file. I can 'cat' the file and it looks normal:
# cat /tmp/.mgwork/VolGroup00
# Generated by LVM2: Sat Oct 28 13:29:00 2006

contents = "Text Format Volume Group"
version = 1

description = "Created *after* executing 'vgdisplay
--ignorelockingfailure -v VolGroup00'"

creation_host = "localhost.localdomain" # Linux localhost.localdomain
2.6.18-1.2798.fc6 #1 SMP Mon Oct 16 14:54:20 EDT 2
006 i686
creation_time = 1162056540 # Sat Oct 28 13:29:00 2006

VolGroup00 {
id = "RZOOeA-hKQ7-MCDq-7NH9-S8sE-g5ec-dlrHZE"
seqno = 3
status = ["RESIZEABLE", "READ", "WRITE"]
extent_size = 65536 # 32 Megabytes
max_lv = 0
max_pv = 0

physical_volumes {

pv0 {
id = "DWhnOR-emk3-dlHj-2QzW-V41j-pgoh-CdXRtf"
device = "/dev/hdc3" # Hint only

status = ["ALLOCATABLE"]
pe_start = 384
pe_count = 2434 # 76.0625 Gigabytes
}

pv1 {
id = "NWfOu4-8kQC-D3uc-hw14-d5bi-Sa2o-JgVH4f"
device = "/dev/hde1" # Hint only

status = ["ALLOCATABLE"]
pe_start = 384
pe_count = 2454 # 76.6875 Gigabytes
}
}

logical_volumes {

LogVol00 {
id = "skZ1EI-9lKu-2sWj-heaj-W41X-kyJh-tHtkvA"
status = ["READ", "WRITE", "VISIBLE"]
segment_count = 2

segment1 {
start_extent = 0
extent_count = 2454 # 76.6875 Gigabytes

type = "striped"
stripe_count = 1 # linear

stripes = [
"pv1", 0
]
}
segment2 {
start_extent = 2454
extent_count = 2400 # 75 Gigabytes

type = "striped"
stripe_count = 1 # linear

stripes = [
"pv0", 0
]
}
}

LogVol01 {
id = "1JDMbX-qLqX-TIn6-MsPD-ErE5-mFwz-TAmBkH"
status = ["READ", "WRITE", "VISIBLE"]
segment_count = 1

segment1 {
start_extent = 0
extent_count = 32 # 1024 Megabytes

type = "striped"
stripe_count = 1 # linear

stripes = [
"pv0", 2400
]
}
}
}
}
================================================

Is there some undocumented syntax change for vgcfgrestore under LVM2?

According to the man page it should work the way I am using it.

??:(




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