Hi, After rebuilt the 2.6 kernel with CONFIG_RAW_DRIVER on, I successfully created the OCFS2 volume. I found following issues. 1. The mount operation completes with error information. buffer layer error at fs/buffer.c:1260 Call Trace: [<c015e9b6>] mark_buffer_dirty [ ] journal_create [ ] ocfs_journal_create [ ] ocfs_check_volume [ ] default_wake_function ...... 2. The umount operation halts with error information. sleeping function called from invalid context at kernel/sched.c:1751 in_atomic():1, irq_disable():0 Call Trace: [ ] __might_sleep [ ] wait_for_completion [ ] send_sig_info [ ] ocfs_dismount_volume ********************************************* Sonic Zhang Software Engineer Intel China Software Lab Tel: (086)021-52574545-1667 iNet: 752-1667 *********************************************