[systemd-devel] cannot start swap unit on lvm

[Kay Sievers]

On Thu, Sep 13, 2012 at 2:23 PM, Lennart Poettering
<lennart at poettering.net> wrote:
> On Thu, 13.09.12 15:47, Alexey Shabalin (a.shabalin at gmail.com) wrote:
>
>> > Please check with "udevadm info
>> > /dev/disk/by-uuid/a8ce6981-1afd-4af6-8783-784b3c7a7d64" if the device is
>> > properly initialized and the systemd tag appears in TAGS=. Only then
>> > systemd will pick it up.
>> >
>> I see TAGS:
>>
>> P: /devices/virtual/block/dm-1
>> N: dm-1
>> E: DEVNAME=/dev/dm-1
>> E: DEVPATH=/devices/virtual/block/dm-1
>> E: DEVTYPE=disk
>> E: DM_UDEV_DISABLE_DISK_RULES_FLAG=1
>> E: DM_UDEV_DISABLE_OTHER_RULES_FLAG=1
>> E: DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG=1
>> E: MAJOR=253
>> E: MINOR=1
>> E: SUBSYSTEM=block
>> E: SYSTEMD_READY=0
>> E: TAGS=:systemd:
>> E: USEC_INITIALIZED=41372
>
> TAGS is there but the symlink to
> /dev/disk/by-uuid/a8ce6981-1afd-4af6-8783-784b3c7a7d64 is not known by
> udev. This usually indicates that your lvm installation is broken and
> doesn't properly integrate into udev (are you sure you enabled udev when
> building lvm?).
>
> But please bring this up with the LVM as this is hardly a systemd
> issue...

Existing symlinks, but missing symlink entries in the database often
indicates an initrd assembly, where the udev database did not survive
the transition to the real rootfs.

Kay