Mailinglist Archive: opensuse (1473 mails)

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Re: [opensuse] UUID=>0x and LVM
  • From: Philip Mötteli <philip.moetteli@xxxxxxxxxxxxx>
  • Date: Tue, 16 Jun 2009 08:54:49 +0200
  • Message-id: <web-42182587@xxxxxxxxxxxxxxxxx>
Hi,


Quoting "Boyd Stephen Smith Jr." <bss@xxxxxxxxxxxxxxxxx>:

In Monday 15 June 2009, you wrote:
To see the UUIDs on the system as LVM sees them issue the command:
pvscan -u

Booting from the system, this gives:

Couldn't find device with uuid ' lLWxB7-QmLl-FMXX-KQRW-EDH2-EHLL-o7D21b'
Couldn't find device with uuid ' lLWxB7-QmLl-FMXX-KQRW-EDH2-EHLL-o7D21b'
Couldn't find device with uuid ' lLWxB7-QmLl-FMXX-KQRW-EDH2-EHLL-o7D21b'
PV /dev/sda4 with UUID ecQz2l-Yl5S-s1AR-delt-5zXF-Wnjs-P2y2dH VG
system lvm2 [113.03 GB / 0 free]
PV /dev/sdb1 with UUID 5P6jGx-ePjX-43Az-wyLL-wuF5-R4Vt-vP9Uff VG
system lvm2 [465.76 / 0 free]
PV unknown device with UUID lLWxB7-QmLl-FMXX-KQRW-EDHZ-EHLL-o7DZ1b VG
system lvm2 [465.76 GB / 224.54 GB free]
Total: 3 [1.02 TB] / in use: 3 [1.02 TB] / in no VG: 0 [0 ]

When I boot from the GParted live-CD:

PV /dev/sdb4 with UUID ecQz2l-Yl5S-s1AR-delt-5zXF-Wnjs-P2y2dH VG
system lvm2 [113.03 GB / 0 free]
PV /dev/sdc1 with UUID 5P6jGx-ePjX-43Az-wyLL-wuF5-R4Vt-vP9Uff VG
system lvm2 [465.76 GB / 0 free]
PV /dev/sda with UUID lLWxB7-QmLl-FMXX-KQRW-EDHZ-EHLL-o7DZ1b VG system
lvm2 [465.76 GB / 224.54 GB free]
Total: 3 [1.02 TB] /in use: 3 [1.02 TB] / in no VG: 0 [0 ]

No error at all. How does the GParted Live-CD do that?

This is something different. As the GParted Live-CD shows, the device has
the correct UUID. This means that, for whatever reason, LVM is not scanning
the correct device(s) to find a UUID. Either that, or the disk itself isn't
being detected by the kernel, so the block devices (for the disk and
partitions) are not being created.

When you boot the system normally, which device is the drive that LVM can't
find?

sdc


You may simply be missing the correct kernel module for the disk
controller.

How could I verify that?


Assuming you can determine which device LVM should be finding (perhaps
/dev/sdc?), check your /etc/lvm/lvm.conf. Specifically, the "device"
section. Mine looks like this:
devices {
dir = "/dev"
scan = [ "/dev" ]
filter = [ "r|/dev/.*/by-path/.*|", "r|/dev/.*/by-id/.*|", "a/.*/" ]
cache = "/etc/lvm/.cache"
write_cache_state = 1
sysfs_scan = 1
md_component_detection = 1
}

Mine is:

filter = [ "r|/dev/.*/by-path/.*|", "r|/dev/.*/by-id/.*|", "a/.*/" ]


The critical lines are the "scan"

This one is also the same.


If your device is rejected (name

How could I find its name? Is it 'sdc'?

Btw: Here is fdisk's output:

Disk /dev/sda: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x0007e41f

Device Boot Start End Blocks Id System
/dev/sda1 1 2612 20980858+ c W95 FAT32 (LBA)
/dev/sda2 2613 4571 15735667+ 82 Linux swap / Solaris
/dev/sda3 * 4572 4702 1052257+ 83 Linux
/dev/sda4 4703 19457 118519537+ 8e Linux LVM

Disk /dev/sdb: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x000d7480

Device Boot Start End Blocks Id System
/dev/sdb1 1 60801 488384001 8e Linux LVM

Disk /dev/sdc: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x00000000

Disk /dev/sdc doesn't contain a valid partition table

Disk /dev/dm-0: 858.9 GB, 858993459200 bytes
255 heads, 63 sectors/track, 104433 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x00000000

Disk /dev/dm-0 doesn't contain a valid partition table

Disk /dev/dm-1: 21.4 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x00000000

Disk /dev/dm-1 doesn't contain a valid partition table



Thanks a lot for your help!
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