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Re: Can't scan new disk

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On 20.02.2019 11:16, Mark Allums wrote:
> On 2/17/19 10:59 PM, Alexander V. Makartsev wrote:
>> On 17.02.2019 1:21, Mark Allums wrote:
>>> On 2/16/19 2:41 AM, Curt wrote:
>>>> On 2019-02-15, Mark Allums <mark@allums.email> wrote:
>>>>> I just bought a new backup disk, and I want to check it. It's
>>>>> mounted in
>>>>> a USB dock.
>>>>>
>>>>> Running the following gives an error:
>>>>>
>>>>> root@martha:~# umount /dev/sdb1
>>>>> root@martha:~# e2fsck -c -c -C 0 -f -F -k -p /dev/sdb1
>>>>> /dev/sdb1 is in use.
>>>>> e2fsck: Cannot continue, aborting.
>>>>>
>>>>> What's causing this and how do I fix it?  It's not MATE; I tried
>>>>> rebooting to rescue mode, but that didn't help.
>>>>>
>>>>> Mark
>>>>
>>>> People sometimes recommend 'fuser' in cases like these in order to
>>>> identify processes that might be accessing the drive.
>>>>
>>>> I mean, the message says '/dev/sdb1 is in use.' Perhaps it is indeed.
>>>>
>>>>   fuser -v -m /dev/sdb1
>>>>
>>>> Worth a try, maybe, as no one else seems to have suggested it.
>>>
>>> root@martha:~# fuser -v -m /dev/sdb1
>>> root@martha:~#
>>>
>>> No results.  Thanks.
>>>
>>> Mark
>>>
>> Maybe something simple like "lsof" command can shed some light on
>> this problem?
>>      $ sudo lsof /dev/sdb
>>      $ sudo lsof /dev/sdb1
>
> root@martha:~# lsof /dev/sdb
> lsof: WARNING: can't stat() fuse.gvfsd-fuse file system
> /run/user/1001/gvfs
>       Output information may be incomplete.
> root@martha:~# lsof /dev/sdb1
> lsof: WARNING: can't stat() fuse.gvfsd-fuse file system
> /run/user/1001/gvfs
>       Output information may be incomplete.
> root@martha:~#
>
There you have it. "lsof" command should not output anything if examined
object is not in use.
I assume that "/dev/sdb1" gets auto-mounted by gvfsd [1] for user with
UID 1001.
AFAIK GIO and company implements different mounting scheme without
involving traditional kernel mounting and allow to restrict mounted
devices only for user who mounted them.
So even root user can't access them if they are mounted by other user.
Try to use gio [2] utility to check status and unmount "/dev/sdb1" device.

[1] man gvfsd
[2] man gio

-- 
With kindest regards, Alexander.

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⢿⡄⠘⠷⠚⠋⠀ https://www.debian.org
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Thread

Can't scan new disk Mark Allums <mark@allums.email> - 2019-02-16 00:30 +0100
  Re: Can't scan new disk deb <deb@rangingthoughts.org> - 2019-02-16 01:10 +0100
    Re: Can't scan new disk Mark Allums <mark@allums.email> - 2019-02-16 02:50 +0100
  Re: Can't scan new disk songbird <songbird@anthive.com> - 2019-02-16 01:30 +0100
    Re: Can't scan new disk Mark Allums <mark@allums.email> - 2019-02-16 02:50 +0100
  Re: Can't scan new disk David Christensen <dpchrist@holgerdanske.com> - 2019-02-16 04:20 +0100
    Re: Can't scan new disk Mark Allums <mark@allums.email> - 2019-02-16 21:40 +0100
      Re: Can't scan new disk David Christensen <dpchrist@holgerdanske.com> - 2019-02-16 23:20 +0100
        Re: Can't scan new disk Mark Allums <mark@allums.email> - 2019-02-18 04:20 +0100
          Re: Can't scan new disk David Christensen <dpchrist@holgerdanske.com> - 2019-02-19 00:40 +0100
        Re: Can't scan new disk Celejar <celejar@gmail.com> - 2019-02-19 19:00 +0100
          Re: Can't scan new disk David Christensen <dpchrist@holgerdanske.com> - 2019-02-20 03:50 +0100
            Re: Can't scan new disk Celejar <celejar@gmail.com> - 2019-02-20 04:30 +0100
              Re: Can't scan new disk David Christensen <dpchrist@holgerdanske.com> - 2019-02-20 06:30 +0100
                Re: Can't scan new disk Celejar <celejar@gmail.com> - 2019-02-20 14:20 +0100
  Re: Can't scan new disk Curt <curty@free.fr> - 2019-02-16 09:50 +0100
    Re: Can't scan new disk Mark Allums <mark@allums.email> - 2019-02-16 21:30 +0100
      Re: Can't scan new disk "Alexander V. Makartsev" <avbetev@gmail.com> - 2019-02-18 06:10 +0100
        Re: Can't scan new disk Mark Allums <mark@allums.email> - 2019-02-20 07:20 +0100
          Re: Can't scan new disk Curt <curty@free.fr> - 2019-02-20 10:30 +0100
            Re: Can't scan new disk Mark Allums <mark@allums.email> - 2019-02-20 10:30 +0100
              Re: Can't scan new disk Curt <curty@free.fr> - 2019-02-20 11:30 +0100
          Re: Can't scan new disk "Alexander V. Makartsev" <avbetev@gmail.com> - 2019-02-20 10:30 +0100
            Re: Can't scan new disk Mark Allums <mark@allums.email> - 2019-02-20 10:50 +0100
              Re: Can't scan new disk "Thomas Schmitt" <scdbackup@gmx.net> - 2019-02-20 11:30 +0100
            Re: Can't scan new disk Curt <curty@free.fr> - 2019-02-20 13:20 +0100
            Re: Can't scan new disk Mark Allums <mark@allums.email> - 2019-02-24 15:50 +0100
              Re: Can't scan new disk David Christensen <dpchrist@holgerdanske.com> - 2019-02-24 21:30 +0100
                Re: Can't scan new disk David Wright <deblis@lionunicorn.co.uk> - 2019-02-24 23:10 +0100
                Re: Can't scan new disk David Christensen <dpchrist@holgerdanske.com> - 2019-02-25 01:10 +0100
                Re: Can't scan new disk Linux-Fan <Ma_Sys.ma@web.de> - 2019-02-25 12:40 +0100
                Re: Can't scan new disk Mark Allums <mark@allums.email> - 2019-02-25 15:20 +0100
                Re: Can't scan new disk Curt <curty@free.fr> - 2019-02-25 15:50 +0100
                Re: Can't scan new disk Mark Allums <mark@allums.email> - 2019-02-25 16:00 +0100
                Re: Can't scan new disk David Wright <deblis@lionunicorn.co.uk> - 2019-02-25 16:30 +0100
                Re: Can't scan new disk <tomas@tuxteam.de> - 2019-02-26 09:30 +0100
              Re: Can't scan new disk David Wright <deblis@lionunicorn.co.uk> - 2019-02-24 23:10 +0100
              Re: Can't scan new disk "Alexander V. Makartsev" <avbetev@gmail.com> - 2019-02-25 20:20 +0100
          Re: Can't scan new disk Jude DaShiell <jdashiel@panix.com> - 2019-02-20 18:40 +0100

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