Ich werde ab  05.06.2010 nicht im Büro sein. Ich kehre zurück am
18.06.2010.

I will answer this mail after my return.

Kind Regards,
Thomas Luetzel



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On Wed, 9 Jun 2010, Francois Joubert wrote:

> It seems there are two types of memory sticks. The one type will be visible
> as /dev/umass0t?? the other type as /dev/hd1t6 (example). As I understand a
> flash drive is mounted as /dev/hd? and then its partitions.

I think this is more dependent on when the stick is inserted. There are still
two versions of usb enumerator used in 6.4.1 on the selfhosted default installation.

>
> If a memory stick is inserted and the device /dev/umass0 is created, the
> memory stick will automatically be mounted under /fs/usb0, no problem.
>
> If a memory stick(a flash drive)  is inserted and the device /dev/hd1t6, as
> an example, is created, the memory stick is not automatically mounted.
>
> If however QNX boot up with the flash drive inserted (/dev/hd1), then the
> memory stick is mounted as /fs/hd1xxxx. If the memory stick is now removed
> and inserted, then the memory stick mounts automatically.
>
> We have to write software to handle all this because the customer will arrive
> with any type of USB memory stick and I want the system to respond in a
> consistent manner.
>
> To add to the confusion, it seems the way the device is created depends on
> the motherboard and the BIOS. On one motherboard, the memory stick is mounted
> as /dev/hd1 and on another motherboard as /dev/umass0.

Compare the args to devb-umass in the two cases and you'll see that in the
second case specific device names are passed in (name=umass) where as in the
first case the defaults are used which is the hd# convention.

You want to look at the new device enumerators as those are supported going
forward. (enum-devices and enum-usb) Also check out the docs on mcd which
should handle mounting of partitioned and non-partitions memory sticks.

Hope this helps a bit.

Peter