I am still reading scsi_mid_low_api.txt file. Report my newly discovery. Trace to kernel code,function call to "blk_execute_rq(req->q, NULL, req, 1);" at scsi_lib.c It's too deep to trace. This function not response to my driver so that insmod stuck. If you are well known on this please tell me what wrong is! ___________________________________________________ 您的生活即時通 - 溝通、娛樂、生活、工作一次搞定! http://messenger.yahoo.com.tw/ - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html