cs,

>I have two question for davinci Dm6446 to use usb disk . 
>
>I plug my udisk to Dm6446 EVM, but I get an message " usb 1->1: new high speed 
>USB device using musb_hdrc and address XXX". But I didn't see /dev/sda?? , so 
>I wander how to use udisk under linux. Can any one tell me. 

can you tell us which kernel version did you use?
I think you should have a look at this thread:
http://www.mail-archive.com/[email protected]/msg05480.html

try it:
modprobe scsi_mod
modprobe sd_mod
modprobe musb_hdrc
modprobe usb_storage
mount -t vfat /dev/sda1 /mnt


>Another question, the if driver use USB 2.0 full speed mode ( 480M bps ) , 
>what is the average speed when transfer data , I also expect it can attain 54M 
>byte per sec at least 

/Frank
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