On 12/22/06, colin <colin@xxxxxxxxxxxxxx> wrote:
Hi Erik, My colleague said that when use direct I/O on USB disk that has a ext3 partition, open can succeed, but read fails. I know that filesystem must have some system calls for direct I/O, and open with O_DIRECT flag will check if these system calls exist. But why does read fail? Is it that direst I/O cannot use on USB disk?
Have you aligned the buffers correctly. Read/Write will fail if buffer is not aligned in sector boundry. -- --------------------------------------------------------------- regards Manish Regmi --------------------------------------------------------------- UNIX without a C Compiler is like eating Spaghetti with your mouth sewn shut. It just doesn't make sense. -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
