LinuxQuestions.org - Missing Logical Volume. Need Help

I have a problem with my Linux box running Redhat 5.

One morning I came, I found that my /home directory is no longer accessible.

Here is how my box is setup. My disk is 500GB. There are two volume groups (VolGroup00 and VolGroup01).
VolGroup00 has two logical volumes (LogVol00 and LogVol01). LogVol00 has ~250 GB and is mounted as /. LogVol01 is ~4GB and is mounted as swap. (see below for /etc/lvm/backup/VolGroup00)
VolGroup01 has one only one logical volume (LogVol01), ~250GB and is mounted as /home. (see below for /etc/lvm/backup/VolGroup01)

When I try reboot, I get a an error:
fsck.ext3: No such file or directory while trying to open /dev/VolGroup01/LogVol00

and boots me into single user mode. When I commented in fstab to mount /dev/VolGroup01/LogVol00, I am able to boot up. Of course, /home is not mounted. See below when I ran "fdisk -l", "vgscan" and "lvdisplay". Note VolGroup00/LogVol00 is now sized as 455GB. What happen to VolGroup01?

I have a lot of critical information in VolGroup01 which I would like to get back. What can I do? Please help.

[root@apd lvm]# fdisk -l

Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 1 5 40131 de Dell Utility
/dev/sda2 6 789 6297480 c W95 FAT32 (LBA)
/dev/sda3 * 790 814 200812+ 83 Linux
/dev/sda4 815 60801 481845577+ 5 Extended
/dev/sda5 815 60801 481845546 8e Linux LVM

Disk /dev/sdb: 8166 MB, 8166703104 bytes
224 heads, 63 sectors/track, 1130 cylinders
Units = cylinders of 14112 * 512 = 7225344 bytes

Device Boot Start End Blocks Id System
/dev/sdb1 1 1131 7975268 c W95 FAT32 (LBA)

[root@apd lvm]# vgscan
Reading all physical volumes. This may take a while...
Found volume group "VolGroup00" using metadata type lvm2

[root@apd lvm]# lvdisplay
--- Logical volume ---
LV Name /dev/VolGroup00/LogVol00
VG Name VolGroup00
LV UUID F99tdn-wOjj-U9h5-KCKd-ASUC-gWWX-bbZE5x
LV Write Access read/write
LV Status available
# open 1
LV Size 455.59 GB
Current LE 14579
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0

--- Logical volume ---
LV Name /dev/VolGroup00/LogVol01
VG Name VolGroup00
LV UUID nnsAo8-bMXm-SGij-Y6wd-0z7G-WMRL-3TdYjJ
LV Write Access read/write
LV Status available
# open 1
LV Size 3.91 GB
Current LE 125
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1

File /etc/lvm/backup/VolGroup00
# Generated by LVM2 version 2.02.40-RHEL5 (2008-10-24): Thu Oct 21 23:40:02 2010

contents = "Text Format Volume Group"
version = 1

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

creation_host = "localhost.localdomain" # Linux localhost.localdomain 2.6.18-128.el5 #1 SMP Wed Dec 17 11:41:38 EST 2008 x86_64
creation_time = 1287722402 # Thu Oct 21 23:40:02 2010

VolGroup00 {
id = "BwO3JL-iZ1w-I092-hqyd-luxp-KlmA-veBrJV"
seqno = 3
status = ["RESIZEABLE", "READ", "WRITE"]
flags = []
extent_size = 65536 # 32 Megabytes
max_lv = 0
max_pv = 0

physical_volumes {

pv0 {
id = "Z2FDMW-YRCf-XAtG-vAVv-cy7X-FOXt-n7aQKx"
device = "/dev/sda5" # Hint only

status = ["ALLOCATABLE"]
flags = []
dev_size = 963691092 # 459.524 Gigabytes
pe_start = 384
pe_count = 14704 # 459.5 Gigabytes
}
}

logical_volumes {

LogVol00 {
id = "F99tdn-wOjj-U9h5-KCKd-ASUC-gWWX-bbZE5x"
status = ["READ", "WRITE", "VISIBLE"]
flags = []
segment_count = 1

segment1 {
start_extent = 0
extent_count = 14579 # 455.594 Gigabytes

type = "striped"
stripe_count = 1 # linear

stripes = [
"pv0", 0
]
}
}

LogVol01 {
id = "nnsAo8-bMXm-SGij-Y6wd-0z7G-WMRL-3TdYjJ"
status = ["READ", "WRITE", "VISIBLE"]
flags = []
segment_count = 1

segment1 {
start_extent = 0
extent_count = 125 # 3.90625 Gigabytes

type = "striped"
stripe_count = 1 # linear

stripes = [
"pv0", 14579
]
}
}
}
}

File /etc/lvm/backup/VolGroup01
# Generated by LVM2 version 2.02.40-RHEL5 (2008-10-24): Fri Nov 12 16:31:40 2010

contents = "Text Format Volume Group"
version = 1

description = "Created *after* executing '/usr/sbin/lvcreate -n LogVol00 -l 238467 VolGroup01'"

creation_host = "b8-ac-6f-4b-97-8c.dhcp.lbl.gov" # Linux b8-ac-6f-4b-97-8c.dhcp.lbl.gov 2.6.18-128.el5 #1 SMP Wed Dec 17 11:41:38 EST 2008 x86_64
creation_time = 1289608300 # Fri Nov 12 16:31:40 2010

VolGroup01 {
id = "QbXBsA-JFHq-OLKy-r0Jm-78X2-ERRH-0bM1vx"
seqno = 2
status = ["RESIZEABLE", "READ", "WRITE"]
flags = []
extent_size = 8192 # 4 Megabytes
max_lv = 256
max_pv = 256

physical_volumes {

pv0 {
id = "C36bLS-J8Qq-Ks9X-4G2E-v85r-Psek-E6D7rd"
device = "/dev/sdb1" # Hint only

status = ["ALLOCATABLE"]
flags = []
dev_size = 1953525167 # 931.513 Gigabytes
pe_start = 384
pe_count = 238467 # 931.512 Gigabytes
}
}

logical_volumes {

LogVol00 {
id = "vE0Lzh-9Z15-KShu-ahfb-JNBJ-VpF2-23eF1s"
status = ["READ", "WRITE", "VISIBLE"]
flags = []
segment_count = 1

segment1 {
start_extent = 0
extent_count = 238467 # 931.512 Gigabytes

type = "striped"
stripe_count = 1 # linear

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