Re: SCSI Emulace (USB flash disk)

[vitko <vitk0 zavinac seznam bod cz>]

Slavek Banko píše v Ne 17. 09. 2006 v 21:51 +0200:

> Setkal jsem se s tím, že novější jádra již místo modulu usb-storage 
> používají nový modul ub a zařízení pak jsou dostupná jako /dev/ub*, 
> například /dev/uba1.

...
CONFIG_BLK_DEV_UB is a _low_ performance driver. It is SLOWER than 
usb-storage. The trade-off is higher "reliablity" in a certain sense. it 
is the "low-performance but highly interoperable driver"
...
So Pete wrote UB. UB bypasses the SCSI layer altogether and impliments 
only a subset of usb-storage. It tries to impliment such a small subset 
of the protocol that is likely to work with a larg number of devices 
without any issues even if it only supports partial functionality. And 
that if it doesn't work with a device no work arounds will be put in -- 
that device just isn't supported. Additionally it has full tracing on 
for errors at all times.
...
So, it is better for certain things and worse for others.
...

(vice na http://linux.usc.edu/pipermail/usclug-chat/2004-December/000111.html,
stoji za precteni)

VK