[systemd-devel] Automount behavior

[Mickaël THOMAS]

Here are some details.

fstab line :
    LABEL=Data    /data    ext4    nofail,auto    0    1

journalctl -b | grep Data :
    Jul 17 04:24:21 mickael-laptop systemd[1]: Expecting device
dev-disk-by\x2dlabel-Data.device...
    Jul 17 04:25:51 mickael-laptop systemd[1]: Job
dev-disk-by\x2dlabel-Data.device/start timed out.
    Jul 17 04:25:51 mickael-laptop systemd[1]: Timed out waiting for
device dev-disk-by\x2dlabel-Data.device.
    Jul 17 04:25:51 mickael-laptop systemd[1]: Dependency failed for
File System Check on /dev/disk/by-label/Data.

systemctl list-jobs (before timeout) :
    JOB UNIT                                           TYPE  STATE
     11 data.mount                                     start waiting
     12 systemd-fsck at dev-disk-by\x2dlabel-Data.service start waiting
     13 dev-disk-by\x2dlabel-Data.device               start running

When shutting down, the message "A start job is running for
dev-disk-by\x2dlabel-Data.device" shows up and I have to wait for the
timeout to end.

For now, a workaround I found is to change "auto" to "noauto" and
symlink dev-disk-by\\x2dlabel-Data.device.wants/data.mount to
/run/systemd/generator/data.mount
Disabling the file-system check also seems to fix the issue
(discovered that just now)

2013/7/17 Lennart Poettering <lennart at poettering.net>:
> On Sun, 16.06.13 22:32, Mickaël THOMAS (mickael9 at gmail.com) wrote:
>
>>
>> I've also found another issue regarding this (it's a small issue but still...)
>>
>> Using "nofail" (and implied "auto") works as expected but if the
>> device is not there at boot time, systemd will try to mount it anyway
>> and fail after a certain timeout.
>> Problem is, if I happen to shutdown my machine before the timeout
>> ends, it will hang until the timeout has passed.
>> Ideally, I don't need systemd to try to mount the device if the disk
>> isn't there. Perhaps this could be the behavior when "nofail" option
>> is used.
>>
>> What's your thoughts about this?
>
> Oh, umm. So "nofail" is not supposed to cause delays at boot
> really. This really should just mount the fs if it is found during
> early-boot. If it isn't found it shouldn't get mounted or anything
> delayed for it.
>
> if this causes a delay for you then there's a bug somewhere.
>
> What's the precise fstab line you use now?
>
> Lennart
>
> --
> Lennart Poettering - Red Hat, Inc.