SanDisk mp3 player not seen

[aaron d]

I have a clip+ and can second the MSC protocol for use as mass storage
filesystem. It then works well with gpodder and simple 'cp' (or GUI equiv.)


On Thu, Oct 14, 2010 at 1:01 PM, D. Hugh Redelmeier <hugh-pmF8o41NoarQT0dZR+AlfA at public.gmane.org> wrote:

> | From: Chris F.A. Johnson <chris-E7bvbYbpR6jSUeElwK9/Pw at public.gmane.org>
>
> |    It's a 1GB SanDisk Clip: <http://cfajohnson.com/testing/SanDisk.jpg>.
> |
> |    I followed the instructions at
> |    <http://www.howtoforge.com/sandisk_mp3_player_linux>, but nothing
> |    works.
>
> Those instructions are for the e200 series.  You have a Sansa Clip of
> some kind (there are several versions, the current being the Clip+).
>
> Judging from the fact that rockbox has stable ports for the e200
> series and unstable ones for the Clip v2 and Clip+, they are surely
> different in guts.  <http://www.rockbox.org/>
>
> That does not mean that the Linux support is different, but it means
> that it could be.
>
> There are two "standard" protocols for USB Digital Audio Players: UMS
> (USB Mass Storage -- looks like flash memory; well supported) aka MSC
> (usb Mass Storage Class) and MTP (Microsoft's favoured Media Transport
> Protocol <http://en.wikipedia.org/wiki/Media_Transfer_Protocol>).
>
> MTP support does exist in Linux.  My understanding is that various
> manufacturers implement it a little differently so there are some
> device-dependent fiddles.
>
> Your version of the Clip may or may not let you configure which you
> are using.  The instructions pointed at (for the e250) tell you to
> switch it to "MSC".
>
> MTP is supported in current Linux, but it has been improving over the
> last few years.  So you should be using a non-ancient distro if you
> want good luck with MTP devices.  If that sounds like superstition,
> that's because it is: I don't know the cold hard facts.
>
> So: before I go too much further, I should know if MTP is an issue
> here.  Do you know if your clip can be set to be UMS?  If so, that is
> the easiest approach.
>
> MTP may be more suited to DAP uses.  I don't understand it, but it
> seems to have a model of files as having artists, titles, albums,
> covers, etc. that matches commercial music.  MSC just has a filesystem
> hierarchy (which I'm more comfortable with) and some convention(s)
> for encoding playlists in a file.
>
> Programs such as Amorok and Gnomad2 understand MTP, with the aid of
> libraries (libmtp in particular).  I don't know if MTP devices can
> appear as mounted filesystems.
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