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permalink · #1 (**permalink**) 02-21-2008, 08:48 AM

I have a strange problem with a USB flash drive. After a fresh reboot,
the device of the drive's partition (/dev/sda1) does not exist:

[~]$ mount /mnt/flash/
mount: special device /dev/sda1 does not exist

The only way I've found to make it show up is to attempt to mount the
device itself as root:

>>>ROOT<<< [~]# mount /dev/sda /mnt/flash
mount: you must specify the filesystem type

This fails for obvious reasons, but immediately after running this
command, the "real" device /dev/sda1 shows up, and works fine as a
normal user. The above command only has this effect when run as root;
a normal user can't make this happen. Here's the relevant fstab entry:

/dev/sda1 /mnt/flash vfat
noauto,sync,users,umask=000,defaults 0 0

Does anyone know what's going on? Is there something I can do to make
the device properly available on boot? After doing the workaround
above, the device works perfectly well and can be mounted and unmounted
by a normal user, until the next reboot.

permalink · #2 (**permalink**) 02-21-2008, 08:48 AM

micromoog enlightened us with:
> I have a strange problem with a USB flash drive. After a fresh
> reboot, the device of the drive's partition (/dev/sda1) does not
> exist: [...] The only way I've found to make it show up is to
> attempt to mount the device itself as root:

I have the same problem with my USB card reader. I wrote a little
script that can mount it, instead of using 'mount' directly.

Sybren
--
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself?

permalink · #3 (**permalink**) 02-21-2008, 08:48 AM

Sybren Stuvel wrote:
> micromoog enlightened us with:
>
>>I have a strange problem with a USB flash drive. [Initially],
>>the device of the drive's partition (/dev/sda1) does not
>>exist
>
> I have the same problem with my USB card reader. I wrote a little
> script that can mount it, instead of using 'mount' directly.

Shouldn't hotplug load the required modules automagically?

--
Ben M.

permalink · #4 (**permalink**) 02-21-2008, 08:48 AM

Exactly the same problem for me. I have to mount in root, unmount, then it
mounts in user space. I haver never really tried to solve that problem, but
if anybody has a clue ?
Concerning hotplug : when a device is plugged, scripts are automatically
lauched in /etc/hotplug/usb. I've plenty of 'sane' stuff there, but this is
a nice case because scanners are listed and identified. I don't know if
there is a listing of USB devices such as flash keys, with the
corresponding scripts. In this case, it should be easy to automatically
mount the key.
What about automount ? How does it work ?

permalink · #5 (**permalink**) 02-21-2008, 08:48 AM

Albert enlightened us with:
> Concerning hotplug : when a device is plugged, scripts are
> automatically lauched in /etc/hotplug/usb. [...] I don't know if
> there is a listing of USB devices such as flash keys, with the
> corresponding scripts. In this case, it should be easy to
> automatically mount the key.

Write your own script, reference it in /etc/hotplug/usb.usermap.

Sybren
--
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself?

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Flash drive not available until accessed by root user