I am connecting a samsung smartphone (galaxy s3) to a freebsd machine. It does not automatically mount. When plugging this machine in, the following message appears:
ugen 7.2: <SAMSUNG> at usbus7
When disconnecting, the following message appears:
ugen 7.2: <SAMSUNG> at usbus7 (disconnected)
What does this tell me about how to mount this smartphone?
Can/Do you set it to mass storage mode on the phone before attaching the cable? (I do not have one, but mine has several USB options and does not automatically become a pen drive.
Unfortunately not. When plugging in the device, the screen shows the message:
Connected as a media device (touch for other USB options)
and when pressing that the following two options appear:
Media device (MTP) [switched on by default]
Camera (PTP) [switched off by default]
The former option mentions a link to Android.com, which contains some instructions on how to connect to a Mac or Windows computer, but not Linux or FreeBSD.
So, no mount, but is there a new raw device in /dev ?
There is. The following new line appears:
lrwxr-xr-x 1 root wheel 9 Oct 20 08:06 ugen7.2 -> usb/7.2.0
List the target (-L). Can you manually mount it?
With listing the target you mean something like the following?:
ls -L ugen7.2
Mounting is something as follows?:
# mount -t msdosfs /dev/ugen7.2 /mnt
mount_msdosfs: /dev/ugen7.2: Block device required
Perhaps a different syntax?
Yes, now that we can see that it is a symbolic link inode, what is the nature of the thing it points to? The -L of ls is like the -follow in find, or stat() versus lstat(): Man Page for stat (linux Section 2) - The UNIX and Linux Forums
Well, that is what ls tells us -- what sort of inode do we have so far.
Here is what I tried:
# ls -L ugen7.1
ugen7.1
Also can you explain a bit more about the way to mount? What are things to try?
ls -lLd ugen7.2
Maybe grep in fstab and mtab files to see if it is present, do df ?
# ls -lLd /dev/ugen7.2
crw------- 1 root operator 0, 92 Oct 25 04:46 /dev/ugen7.2
This is what is in fstab:
# Device Mountpoint FStype Options Dump Pass#
/dev/ad4s1b none swap sw 0 0
/dev/ad4s1a / ufs rw 1 1
/dev/ad4s1e /tmp ufs rw 2 2
/dev/ad4s1f /usr ufs rw 2 2
/dev/ad4s1d /var ufs rw 2 2
/dev/acd0 /cdrom cd9660 ro,noauto 0 0
Also df shows the same file systems, ie without the ugen7.2.
By the way, all the time, the samsung galaxy is connected via the usb wire.
I dont think I have a mtab file, at least measuring from the "locate mtab" results.
The mtab is usually /etc/mtab. The device is a c character not a b raw device. If there is no parallel raw device, it may be that the USB is being mounted raw as a character device, not through a driver for a flash memory on USB. Make a listing of the *tab files, df and /dev with the phone and with a pen drive (which probably mounts just fine).
Many users of this and similar devices on *NIX say it is easier to connect over the air to a server you establish on the phone: ftp, ssh, samba! I suppose you could mount an sftp service as a drive with the right tools. Some windows articles talk about MTP drivers, mtpfs, gMTP, libmtp: http://libmtp.sourceforge.net/
One says you need an OTG cable, not the micro usb cable used for charging and sync (2 different USB ports on the phone?)
Another suggested this S2 procedure:
Try the following. This was tested on Galaxy SII, i am assuming it will work for SIII as well
Reference: http://www.tuxtrix.com/2011/07/how-to-access-samsung-galaxy-s-ii-usb.html
Here's how I connect devices through USB to FreeBSD 9 RELEASE:
Plug the device into an available USB port.
Open a terminal window and type the following (with root privileges) to see what the system is calling the device connected to USB:
camcontrol devlist
Here's what mine looks like:
<ST9160310AS 0303> at scbus0 target 0 lun 0 (pass0,ada0)
< USB Flash Memory PMAP> at scbus2 target 0 lun 0 (pass1,da0)
Disregard the fact that my example device is a flash drive, the phone should mount this way as well.
Now you can mount the device with:
mount -t msdosfs /dev/da0s1 /MOUNTPOINT
Just be sure that you get the right device and mount point, and your phone should be mounted.
I think you have slice 1 (s1) automatically detected as being connected to your device. If you do this:
# dmesg | grep da0
then you probably do not see this:
da0: Attempt to query device size failed: NOT READY, Medium not present