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Groups > linux.debian.user > #264491 > unrolled thread

File systems mounted under `/media/root/<UUID>` ?

Started byStefan Monnier <monnier@iro.umontreal.ca>
First post2023-12-09 21:00 +0100
Last post2023-12-12 12:40 +0100
Articles 9 — 5 participants

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  File systems mounted under `/media/root/<UUID>` ? Stefan Monnier <monnier@iro.umontreal.ca> - 2023-12-09 21:00 +0100
    Re: File systems mounted under `/media/root/<UUID>` ? Nicholas Geovanis <nickgeovanis@gmail.com> - 2023-12-10 15:10 +0100
    Re: File systems mounted under `/media/root/<UUID>` ? Max Nikulin <manikulin@gmail.com> - 2023-12-10 16:00 +0100
      Re: File systems mounted under `/media/root/<UUID>` ? Stanislav Vlasov <stanislav.v.v@gmail.com> - 2023-12-10 17:20 +0100
        Re: File systems mounted under `/media/root/<UUID>` ? <tomas@tuxteam.de> - 2023-12-10 17:50 +0100
          Re: File systems mounted under `/media/root/<UUID>` ? Stefan Monnier <monnier@iro.umontreal.ca> - 2023-12-10 18:20 +0100
        Re: File systems mounted under `/media/root/<UUID>` ? Stefan Monnier <monnier@iro.umontreal.ca> - 2023-12-10 17:50 +0100
      Re: File systems mounted under `/media/root/<UUID>` ? Stefan Monnier <monnier@iro.umontreal.ca> - 2023-12-10 17:40 +0100
        Re: File systems mounted under `/media/root/<UUID>` ? Max Nikulin <manikulin@gmail.com> - 2023-12-12 12:40 +0100

#264491 — File systems mounted under `/media/root/<UUID>` ?

FromStefan Monnier <monnier@iro.umontreal.ca>
Date2023-12-09 21:00 +0100
SubjectFile systems mounted under `/media/root/<UUID>` ?
Message-ID<HJbEt-crS3-3@gated-at.bofh.it>
Recently I noticed some unused ext4 filesystems (i.e. filesystems that
aren't in /etc/fstab, that I normally don't mount, typically because
they're snapshots or backups) "magically" mounted as
`/media/root/<UUID>`.

This is on a headless ARM board running Debian stable.

Not sure when this happen, but I noticed t least once happening in
response to `vgchange -ay`.

Any idea who/what does that, and how/where I can control it?


        Stefan

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#264508

FromNicholas Geovanis <nickgeovanis@gmail.com>
Date2023-12-10 15:10 +0100
Message-ID<HJsFk-cD1x-21@gated-at.bofh.it>
In reply to#264491

[Multipart message — attachments visible in raw view] — view raw

On Sat, Dec 9, 2023, 1:50 PM Stefan Monnier <monnier@iro.umontreal.ca>
wrote:

> Recently I noticed some unused ext4 filesystems (i.e. filesystems that
> aren't in /etc/fstab, that I normally don't mount, typically because
> they're snapshots or backups) "magically" mounted as
> `/media/root/<UUID>`.
>
> This is on a headless ARM board running Debian stable.
>
> Not sure when this happen, but I noticed t least once happening in
> response to `vgchange -ay`.
>

Were there any reboots in between?

Any idea who/what does that, and how/where I can control it?
>
>         Stefan
>

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#264509

FromMax Nikulin <manikulin@gmail.com>
Date2023-12-10 16:00 +0100
Message-ID<HJtrH-cDht-7@gated-at.bofh.it>
In reply to#264491
On 10/12/2023 02:49, Stefan Monnier wrote:
> "magically" mounted as
> `/media/root/<UUID>`.
[...]
> Any idea who/what does that, and how/where I can control it?

This path is used by udisks, however I am unsure what may cause 
automounting for root.

I would check

     udisksctl dump
     udevadm info --query=all --name=sda

for various hints related to udisks. Perhaps a better variant of udevadm 
options exists.

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#264520

FromStanislav Vlasov <stanislav.v.v@gmail.com>
Date2023-12-10 17:20 +0100
Message-ID<HJuH7-cEbF-9@gated-at.bofh.it>
In reply to#264509
2023-12-10 19:49 GMT+05:00, Max Nikulin <manikulin@gmail.com>:
> On 10/12/2023 02:49, Stefan Monnier wrote:
>> "magically" mounted as
>> `/media/root/<UUID>`.
> [...]
>> Any idea who/what does that, and how/where I can control it?
>
> This path is used by udisks, however I am unsure what may cause
> automounting for root.
>

In /media/ disks mounts by GUI. Stefan use root in gui login.

-- 
Stanislav

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#264525

From<tomas@tuxteam.de>
Date2023-12-10 17:50 +0100
Message-ID<HJva9-cElh-1@gated-at.bofh.it>
In reply to#264520

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On Sun, Dec 10, 2023 at 11:42:42AM -0500, Stefan Monnier wrote:
> Stanislav Vlasov [2023-12-10 21:16:54] wrote:
> > In /media/ disks mounts by GUI. Stefan use root in gui login.
> 
> Except:
> - I never do a "GUI login" as root.
> - "This is on a headless ARM board running Debian stable".
>   I access it via SSH (and occasionally serial port).

You ssh in as root (or serial port)?

Perhaps it's a "user session" thingy playing games on you?

Cheers
-- 
t

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#264534

FromStefan Monnier <monnier@iro.umontreal.ca>
Date2023-12-10 18:20 +0100
Message-ID<HJvDb-cEKc-1@gated-at.bofh.it>
In reply to#264525
tomas@tuxteam.de [2023-12-10 17:47:41] wrote:
> You ssh in as root (or serial port)?

I do over the serial port, but over SSH, I always login as myself first
and then `su -` to root.

> Perhaps it's a "user session" thingy playing games on you?

Could be,


        Stefan

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#264526

FromStefan Monnier <monnier@iro.umontreal.ca>
Date2023-12-10 17:50 +0100
Message-ID<HJva9-cElh-3@gated-at.bofh.it>
In reply to#264520
Stanislav Vlasov [2023-12-10 21:16:54] wrote:
> In /media/ disks mounts by GUI. Stefan use root in gui login.

Except:
- I never do a "GUI login" as root.
- "This is on a headless ARM board running Debian stable".
  I access it via SSH (and occasionally serial port).


        Stefan

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#264524

FromStefan Monnier <monnier@iro.umontreal.ca>
Date2023-12-10 17:40 +0100
Message-ID<HJv0t-cEhU-3@gated-at.bofh.it>
In reply to#264509
Max Nikulin [2023-12-10 21:49:46] wrote:
> On 10/12/2023 02:49, Stefan Monnier wrote:
>> "magically" mounted as
>> `/media/root/<UUID>`.
> [...]
>> Any idea who/what does that, and how/where I can control it?
>
> This path is used by udisks, however I am unsure what may cause
> automounting for root.
>
> I would check
>
>     udisksctl dump
>     udevadm info --query=all --name=sda
>
> for various hints related to udisks. Perhaps a better variant of udevadm
> options exists.

Thanks.  Now I have some thread on which to pull :-)

Nicholas Geovanis [2023-12-10 08:04:08] wrote:
> Were there any reboots in between?

Yes, I've seen the problem appear a few times over the last few days
where I've been rebooting a few times (while replacing/moving some
drives, and making various adjustments along the way).


        Stefan

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#264664

FromMax Nikulin <manikulin@gmail.com>
Date2023-12-12 12:40 +0100
Message-ID<HK9hg-d3dV-23@gated-at.bofh.it>
In reply to#264524
On 10/12/2023 23:38, Stefan Monnier wrote:
> Max Nikulin [2023-12-10 21:49:46] wrote:
>>      udisksctl dump
>>      udevadm info --query=all --name=sda
>>
>> for various hints related to udisks. Perhaps a better variant of udevadm
>> options exists.
> Thanks.  Now I have some thread on which to pull 🙂

I have realized that I am unsure if drives are automounted by udisksd or 
it needs cooperation from a user application that request mount in 
response to an event for an object having specific hints.

Another idea inspect definition and origin units reported by

systemctl list-units --type automount
systemctl list-units --type mount

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