Re: Pendrive not mounted when another usb device is plugged in
On Sat, 2008-08-16 at 22:27 +0100, Rodolfo Medina wrote:
> Rodolfo Medina <rodolfo.medina@gmail.com> writes:
>
> >>> In my /etc/fstab there is the following entry:
> >>>
> >>> /dev/sda /mnt/sda vfat rw,user,noauto 0 0
> >>>
> >>> , so I normally mount my usb pendrive simply with:
> >>>
> >>> $ mount /mnt/sda
> >>>
> >>> . But, now that I have a usb umts modem (Huawei e169), when it is plugged
> >>> in I don't manage to mount the pendrive: the system claims that the medium
> >>> is `not found'. Then I have to unplug the modem and plug the pendrive in
> >>> again.
>
>
>
> Ron Johnson <ron.l.johnson@cox.net> writes:
>
> >> [...] in /etc/fstab I'd refer to that drive not as /dev/sda but by it's
> >> UUID.
>
>
>
>
> Rodolfo:
>
> > All right, I did so and now the mount problem seems to be fixed. But now,
> > when I want to unmount it, with: `umount /mnt/sda', the output is:
> > `Segmentation fault', and the drive is not unmounted.
> >
> > How to unmount it now?
>
>
> I have to unmount it as root. In fstab there is now:
>
> UUID=44F1-7D0C /mnt/sda vfat rw,user,noauto 0 0
>
> , but as a normal user I can only mount the device, not unmount it: to unmount
> it I must be root. Why this?
>
> Another thing that is not clear to me is the difference between the `user' and
> `users' options of `mount' command.
sent this yesterday, but never saw it come through. If you saw this
post yesterday, just drop me a line so that I can know to check my
filter settings.
User means any user can mount the device, but only THAT user can umount
it.
Users means any user can mount the device, any ANY user can umount that
device.
>
> But now I understand why the problem occurs trying to mount the drive when the
> umts device is already plugged in: for some reason, although the umts device
> is mapped into /dev/ttyUSB0, /dev/sda comes to be busy. So, if I add in fstab
> another line:
>
> /dev/sdb /mnt/sdb vfat rw,user,noauto 0 0
>
> , I can mount the pendrive on /mnt/sdb. But now I wish to use the UUID as
> normal user. Suggestions welcome.
>
> Bye
> Rodolfo
>
>
--
Damon L. Chesser
damon@damtek.com
http://www.linkedin.com/in/dchesser
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