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[Bug 898913] error when using vgscan and vgchange
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Mon, 02 Feb 2015 07:30:08 +0000
  • Message-id: <>

--- Comment #6 from Liuhua Wang <lwang@xxxxxxxx> ---
(In reply to Werner Flamme from comment #5)
It has been quite a while since I opened this bug case,
Sorry for late.

# rpm -qi device-mapper
Name : device-mapper
Version : 1.02.92
Release : 170.1
Architecture: x86_64
Install Date: Wed Jan 14 07:16:36 2015
Distribution: systemsmanagement / openSUSE_Factory

After connecting the USB disk:
# lang=C fdisk -l

Disk /dev/sda: 238.5 GiB, 256060514304 bytes, 500118192 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x00094dd6

Device Boot Start End Sectors Size Id Type
/dev/sda1 2048 4208639 4206592 2G 82 Linux swap / Solaris
/dev/sda2 * 4208640 171976703 167768064 80G 83 Linux
/dev/sda3 171976704 500117503 328140800 156.5G 83 Linux

# partprobe
# vgscan ; vgchange -ay
File descriptor 8 (pipe:[48944]) leaked on vgscan invocation. Parent PID
9788: bash
WARNING: lvmetad is running but disabled. Restart lvmetad before enabling
The lvm2-lvmetad is a metadata cache daemon. You can also use traditional way
to deal with metadata.
The warning messages are noisy but actually harmless. That is because you
disabled lvmetad(use_lvmetad=0) but the lvmetad daemon is running. In this
occasion lvmetad will not be used. Why the daemon is running, it is because
lvm2 package updating will 'try-restart lvm2-lvmetad.socket', which will start
lvm2-lvmetad.service, which is a feature of systemd.
There are two ways to avoid the warning messages:
1. stop .service manually.
2. enable lvmetad by set use_lvmetad=1 in /etc/lvm/lvm.conf

The warning texts are gone, but the volume groups on an external disk (USB3)
are still not recognized. In fact, I often need the partprobe command to
have the system recognize the disk (typically /dev/sdb) at all. And I do not
know what to do about the lvmetad warning.
You mean if you not excute partprobe, lv cannot be activated? Then please
provide the logs:
1. lsblk
2. cat /etc/fstab
3. pvs
4. lvs
5. lvmdump


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