I write simple test programm (host mode, full speed) to work with USB Disk. In the begining this program do: - get descriptor form USB stick (with numbers of IN and OUT end-points in the device), - set this number of IN, OUT endpoints in the USB controller, - set Address 1, - set Configuration 1, - set Interface 0. It can be enumerated . Then program send CBW with any SCSI command (inquiry/read10/write10), but recive NACK. How can I deal with this situation? My Disk is Sandisk 1GB U-Disk.