Physical Volume Detect Error

[riseup]

Hello Getting error as follows.

# vgscan -v
Wiping cache of LVM-capable devices
Wiping internal VG cache
Reading all physical volumes. This may take a while...
Finding all volume groups
Finding volume group "VolGroup00"
Couldn't find device with uuid 'UPkdKc-Ki6u-5GUf-BY8u-WABy-xxxx-xxxxxx'.
Couldn't find device with uuid 'bJaD2H-hx8h-dmD5-AgAk-R-xxxx-xxxxxx'.
Couldn't find device with uuid 'eh2fqQ-RjQZ-eLOc-jVnL-xxxx-xxxx-xxxxxx'.
There are 3 physical volumes missing.
Found volume group "VolGroup00" using metadata type lvm2


Using Red Hat 5.5. Any suggestions if these can be detected
Thanks

[Irithori]

Three physical discs of that vg are missing.
Did you remove them?

[riseup]

No I did not remove.

what does the "vgreduce --removemissing " do.

Is there a way to attach them back.

[Irithori]

Depends if they are still there.
What does this command tell:

blkid

Also look for disk related errors in

dmesg

[riseup]

# blkid
/dev/mapper/VolGroup00-LogVolSwap: TYPE="swap"
/dev/mapper/VolGroup00-LogVolVar: UUID="afc3fbbe-9331-4e8f-a285-6acb55a0cec8" TYPE="ext3"
/dev/mapper/VolGroup00-LogVolTmp: UUID="f3ba88f7-4491-4e39-b4f5-96a0aa8f0ce9" TYPE="ext3"
/dev/mapper/VolGroup00-LogVolRoot: UUID="6e6e8a5d-0277-4153-ac53-eead948a0f53" TYPE="ext3"
/dev/sda1: LABEL="/boot" UUID="39cefed5-95f0-4ef2-a533-cffe4e38e26f" TYPE="ext3"
/dev/hdc: LABEL="VMware Tools" TYPE="iso9660"
/dev/VolGroup00/LogVolRoot: UUID="6e6e8a5d-0277-4153-ac53-eead948a0f53" TYPE="ext3"
/dev/VolGroup00/LogVolSwap: TYPE="swap"

[riseup]

# dmesg | grep -i error
hdc: drive_cmd: status=0x51 { DriveReady SeekComplete Error }
hdc: drive_cmd: error=0x04 { AbortedCommand }
pvs[6650] general protection rip:436720 rsp:7fff7eb6d970 error:0
# dmesg | grep -i disk
VFS: Disk quotas dquot_6.5.1
md: md driver 0.90.3 MAX_MD_DEVS=256, MD_SB_DISKS=27
Vendor: VMware Model: Virtual disk Rev: 1.0
sd 0:0:0:0: Attached scsi disk sda
Vendor: VMware Model: Virtual disk Rev: 1.0
sd 0:0:1:0: Attached scsi disk sdb
Vendor: VMware Model: Virtual disk Rev: 1.0
sd 0:0:2:0: Attached scsi disk sdc

[Irithori]

It seems, there is only one physical disk and one partition.

How many disks/partition does this machine have?
Did you modify the lvm config or partition table or bios config?
Is there maybe a disk failure?

[riseup]

I deleted a partition as we had to modify the block size which was at default.

# fdisk -l

Disk /dev/sda: 42.9 GB, 42949672960 bytes
255 heads, 63 sectors/track, 5221 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 * 1 131 1052226 83 Linux
/dev/sda2 132 5221 40885425 8e Linux LVM

Disk /dev/sdb: 107.3 GB, 107374182400 bytes
255 heads, 63 sectors/track, 13054 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sdb1 1 7296 58605088+ 8e Linux LVM

Disk /dev/sdc: 21.4 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sdc1 1 2610 20964793+ 8e Linux LVM

[Irithori]

Hmm,
by doing so the uuid probably changed.
The strange thing is, that it says three uuids changed, but you only modified one partition.

Which partitions should be in that vg? sda1, sdb1, sdc1?

[riseup]

Needed 2 under sdb
SO sda1, sdb1, sdb2 and sdc1