Accessing a Samsung galaxy mini from Fedora 20 via USB.

[Andy Johnson]

Hi,
I want to access a Samsung galaxy mini smartphone from Fedora 20 via USB.

I am able to do it from windows with Kies (when I plug the USB phone it asks for
USB storage confirmation, and when I press OK everything is fine).

When I connect the galaxy mini smartphone to a Fedora 20 desktop I see
this messages in the kernel log:
usbcore: registered new interface driver usb-storage
scsi 4:0:0:0: Direct-Access     SAMSUNG  GT-S5570 Card    0100 PQ: 0 ANSI: 2
sd 4:0:0:0: Attached scsi generic sg2 type 0
sd 4:0:0:0: [sdb] Attached SCSI removable disk


but fdisk -l does not show /dev/sdb


and:
simple-mtpfs -l
shows:
No raw devices found

Should I install some software on the smartphone to enable access from Fedora ?

regards,
Andy

[Patrick O'Callaghan]

On Tue, Jan 7, 2014 at 7:11 PM, Chris Murphy <lists(a)colorremedies.com&gt;wrote:

>  What you mean is that Android devices don't present themselves as
> a block
>  device, i.e. we don't have access to either logical or physical sectors,
>  therefore we can't load a partition table or even find file system
>  superblocks. It's kinda like only being able to mount a share via NFS,
>  rather than as iSCSI.
>  

Correct, I meant as a block device. However MTP isn't even as capable as
NFS since it doesn't allow random access for writes (not sure about reads).
Files can only be written in their entirety or deleted. mtpfs and similar
interfaces try to make it look as filesystem-like as possible using
caching, but it's still important to keep this in mind.

poc

[Chris Murphy]

On Jan 7, 2014, at 12:11 PM, Chris Murphy <lists(a)colorremedies.com&gt; wrote:
>  mount shows:
>  
>  fusectl on /sys/fs/fuse/connections type fusectl (rw,relatime)
>  gvfsd-fuse on /run/user/1000/gvfs type fuse.gvfsd-fuse
> (rw,nosuid,nodev,relatime,user_id=1000,group_id=1000)
>  
>  So to access storage from command line you'd need to figure out how to use MTP via
> fusectl, I'm not sure it's done with the mount command, never tried it. 

http://askubuntu.com/questions/360002/how-to-use-gvfs-mtp-mount-from-the-...


Chris Murphy

[Mark Haney]

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On 1/7/2014 8:51 AM, Andy Johnson wrote:
>  Hi, I want to access a Samsung galaxy mini smartphone from Fedora
>  20 via USB. 
>  
>  and: simple-mtpfs -l shows: No raw devices found
>  
>  Should I install some software on the smartphone to enable access
>  from Fedora ? 
I have a Nexus 10 and have had the same problem.  My only solution has
been to connect mine to the only copy of Windows I still own (for
gaming only).  I haven't tried with F20, but I know with F19 it did
exactly what you are seeing.



- -- 
Mark Haney
Network Administrator/IT Support
Practichem
W:919-714-8428
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[Chris Murphy]

On Jan 7, 2014, at 9:38 AM, Andy Johnson <johnsonzjo(a)gmail.com&gt; wrote:

>  Hi,
>  Thanks for your answer.
>  
> > Android 4 devices don't export a storage interface,
>  I know, but this is a veteran mini galaxy, and I am sure that it *does* export
>  a storage interface; when I am accessing it from windows with Kies, it
>  prompts me to accept it as a storage device, as I mentioned in my
>  post. 
When Android is in normal operation, it's either MTP or PTP depending on the setting
in USB Connections. By default it's MTP. If you unlock the bootloader and get into the
debug mode, the device behaves differently and it's possible to access the individual
logical block devices, but thus far I haven't found (or gone looking for) a way to
access the partition table. In this mode, one or two of the "partitions" permits
being reformatted, but this is done via SDK tools so only ext4 is permitted. You can't
actually mount the file system as a block device. It's all done via a bridge - that
was via ADB and fastboot when I was trying to truly blow away my phone by replacing with
Google supplied images rather than OTA based updates.

Anyway, what are you trying to do?


Chris Murphy

[Chris Murphy]

On Jan 7, 2014, at 7:01 AM, Patrick O'Callaghan <pocallaghan(a)gmail.com&gt; wrote:

>  Haven't used F20 so far, but note that Android 4 devices
> don't export a storage interface, i.e. they can't be treated as external disks.
Technically they do export a storage interface, by default via MTP, optionally as PTP. Or
neither, in which case I have no access at all.

What you mean is that Android devices don't present themselves as a block device, i.e.
we don't have access to either logical or physical sectors, therefore we can't
load a partition table or even find file system superblocks. It's kinda like only
being able to mount a share via NFS, rather than as iSCSI.

>  You must use MTP to access them which is what simple-mtfs does.
> I've used it successfully on F19. 
Right, this is built into Gnome. I just connected my 2 year old Galaxy Nexus running
4.3.1, and it automounts the Galaxy Nexus device with an Internal Storage icon that I can
navigate. mount shows:

fusectl on /sys/fs/fuse/connections type fusectl (rw,relatime)
gvfsd-fuse on /run/user/1000/gvfs type fuse.gvfsd-fuse
(rw,nosuid,nodev,relatime,user_id=1000,group_id=1000)

So to access storage from command line you'd need to figure out how to use MTP via
fusectl, I'm not sure it's done with the mount command, never tried it.


Chris Murphy

[Andy Johnson]

Hi,
Thanks for your answer.

> Android 4 devices don't export a storage interface, 
I know,
but this is a veteran mini galaxy, and I am sure that it *does* export
a storage interface; when I am accessing it from windows with Kies, it
prompts me to accept it as a storage device, as I mentioned in my
post.

Regards,
Andy


On Tue, Jan 7, 2014 at 4:01 PM, Patrick O'Callaghan
<pocallaghan(a)gmail.com&gt; wrote:
>  On Tue, Jan 7, 2014 at 1:51 PM, Andy Johnson <johnsonzjo(a)gmail.com&gt; wrote:
> >
> > I want to access a Samsung galaxy mini smartphone from Fedora 20 via USB.
> >
> > I am able to do it from windows with Kies (when I plug the USB phone it
> > asks for
> > USB storage confirmation, and when I press OK everything is fine).
> >
> > When I connect the galaxy mini smartphone to a Fedora 20 desktop I see
> > this messages in the kernel log:
> > usbcore: registered new interface driver usb-storage
> > scsi 4:0:0:0: Direct-Access     SAMSUNG  GT-S5570 Card    0100 PQ: 0 ANSI:
> > 2
> > sd 4:0:0:0: Attached scsi generic sg2 type 0
> > sd 4:0:0:0: [sdb] Attached SCSI removable disk
> >
> >
> > but fdisk -l does not show /dev/sdb
> >
> >
> > and:
> > simple-mtpfs -l
> > shows:
> > No raw devices found
> >
> > Should I install some software on the smartphone to enable access from
> > Fedora
>
>
>  Haven't used F20 so far, but note that Android 4 devices don't export a
>  storage interface, i.e. they can't be treated as external disks. You must
>  use MTP to access them which is what simple-mtfs does. I've used it
>  successfully on F19.
>
>  poc
>
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>

[Allann Jones]

On Tue, Jan 7, 2014 at 9:51 AM, Andy Johnson <johnsonzjo(a)gmail.com&gt; wrote:

>  Hi,
>  I want to access a Samsung galaxy mini smartphone from Fedora 20 via USB.
>
>  I am able to do it from windows with Kies (when I plug the USB phone it
>  asks for
>  USB storage confirmation, and when I press OK everything is fine).
>
>  When I connect the galaxy mini smartphone to a Fedora 20 desktop I see
>  this messages in the kernel log:
>  usbcore: registered new interface driver usb-storage
>  scsi 4:0:0:0: Direct-Access     SAMSUNG  GT-S5570 Card    0100 PQ: 0 ANSI:
>  2
>  sd 4:0:0:0: Attached scsi generic sg2 type 0
>  sd 4:0:0:0: [sdb] Attached SCSI removable disk
>
>
>  but fdisk -l does not show /dev/sdb
>
>
>  and:
>  simple-mtpfs -l
>  shows:
>  No raw devices found
>
>  Should I install some software on the smartphone to enable access from
>  Fedora ?
>
>  
https://play.google.com/store/apps/details?id=berserker.android.apps.sshd...

[Patrick O'Callaghan]

On Tue, Jan 7, 2014 at 1:51 PM, Andy Johnson <johnsonzjo(a)gmail.com&gt; wrote:

>  I want to access a Samsung galaxy mini smartphone from Fedora 20 via
> USB.
>
>  I am able to do it from windows with Kies (when I plug the USB phone it
>  asks for
>  USB storage confirmation, and when I press OK everything is fine).
>
>  When I connect the galaxy mini smartphone to a Fedora 20 desktop I see
>  this messages in the kernel log:
>  usbcore: registered new interface driver usb-storage
>  scsi 4:0:0:0: Direct-Access     SAMSUNG  GT-S5570 Card    0100 PQ: 0 ANSI:
>  2
>  sd 4:0:0:0: Attached scsi generic sg2 type 0
>  sd 4:0:0:0: [sdb] Attached SCSI removable disk
>
>
>  but fdisk -l does not show /dev/sdb
>
>
>  and:
>  simple-mtpfs -l
>  shows:
>  No raw devices found
>
>  Should I install some software on the smartphone to enable access from
>  Fedora
>  
Haven't used F20 so far, but note that Android 4 devices don't export a
storage interface, i.e. they can't be treated as external disks. You must
use MTP to access them which is what simple-mtfs does. I've used it
successfully on F19.

poc