Hi everyone this error has been posted before, but there was no reply. i am trying to install a two node cluster, but cannot install the lock_dm module into the kernel. when i type modeprobe lock_dlm. i get the error. FATAL: Error inserting lock_dlm (/lib/modules/2.6.13-1.1532_FC4smp/kernel/fs/gfs_locking/lock_dlm/lock_dlm.ko): Unknown symbol in module, or unknown parameter (see dmesg) Any idea what is going on? see contents of dmesg below: GFS 2.6.11.8-20050601.152643.FC4.18 (built Oct 25 2005 18:08:46) installed lock_dlm: Unknown symbol dlm_debug_dump lock_dlm: Unknown symbol dlm_new_lockspace lock_dlm: Unknown symbol kcl_register_service lock_dlm: Unknown symbol dlm_unlock lock_dlm: Unknown symbol kcl_start_done lock_dlm: Unknown symbol dlm_release_lockspace lock_dlm: Unknown symbol kcl_join_service lock_dlm: Unknown symbol kcl_unregister_service lock_dlm: Unknown symbol kcl_leave_service lock_dlm: Unknown symbol dlm_query lock_dlm: Unknown symbol kcl_get_members lock_dlm: Unknown symbol kcl_releaseref_cluster lock_dlm: Unknown symbol dlm_lock lock_dlm: Unknown symbol kcl_cluster_name lock_dlm: Unknown symbol kcl_get_services lock_dlm: Unknown symbol kcl_addref_cluster lock_dlm: Unknown symbol dlm_debug_dump lock_dlm: Unknown symbol dlm_new_lockspace lock_dlm: Unknown symbol kcl_register_service lock_dlm: Unknown symbol dlm_unlock lock_dlm: Unknown symbol kcl_start_done lock_dlm: Unknown symbol dlm_release_lockspace lock_dlm: Unknown symbol kcl_join_service lock_dlm: Unknown symbol kcl_unregister_service lock_dlm: Unknown symbol kcl_leave_service lock_dlm: Unknown symbol dlm_query lock_dlm: Unknown symbol kcl_get_members lock_dlm: Unknown symbol kcl_releaseref_cluster lock_dlm: Unknown symbol dlm_lock lock_dlm: Unknown symbol kcl_cluster_name lock_dlm: Unknown symbol kcl_get_services lock_dlm: Unknown symbol kcl_addref_cluster lock_dlm: Unknown symbol dlm_debug_dump lock_dlm: Unknown symbol dlm_new_lockspace lock_dlm: Unknown symbol kcl_register_service lock_dlm: Unknown symbol dlm_unlock lock_dlm: Unknown symbol kcl_start_done lock_dlm: Unknown symbol dlm_release_lockspace lock_dlm: Unknown symbol kcl_join_service lock_dlm: Unknown symbol kcl_unregister_service lock_dlm: Unknown symbol kcl_leave_service lock_dlm: Unknown symbol dlm_query lock_dlm: Unknown symbol kcl_get_members lock_dlm: Unknown symbol kcl_releaseref_cluster lock_dlm: Unknown symbol dlm_lock lock_dlm: Unknown symbol kcl_cluster_name lock_dlm: Unknown symbol kcl_get_services lock_dlm: Unknown symbol kcl_addref_cluster lock_dlm: Unknown symbol dlm_debug_dump lock_dlm: Unknown symbol dlm_new_lockspace lock_dlm: Unknown symbol kcl_register_service lock_dlm: Unknown symbol dlm_unlock lock_dlm: Unknown symbol kcl_start_done lock_dlm: Unknown symbol dlm_release_lockspace lock_dlm: Unknown symbol kcl_join_service lock_dlm: Unknown symbol kcl_unregister_service lock_dlm: Unknown symbol kcl_leave_service lock_dlm: Unknown symbol dlm_query lock_dlm: Unknown symbol kcl_get_members lock_dlm: Unknown symbol kcl_releaseref_cluster lock_dlm: Unknown symbol dlm_lock lock_dlm: Unknown symbol kcl_cluster_name lock_dlm: Unknown symbol kcl_get_services lock_dlm: Unknown symbol kcl_addref_cluster lock_dlm: Unknown symbol dlm_debug_dump lock_dlm: Unknown symbol dlm_new_lockspace lock_dlm: Unknown symbol kcl_register_service lock_dlm: Unknown symbol dlm_unlock lock_dlm: Unknown symbol kcl_start_done lock_dlm: Unknown symbol dlm_release_lockspace lock_dlm: Unknown symbol kcl_join_service lock_dlm: Unknown symbol kcl_unregister_service lock_dlm: Unknown symbol kcl_leave_service lock_dlm: Unknown symbol dlm_query lock_dlm: Unknown symbol kcl_get_members lock_dlm: Unknown symbol kcl_releaseref_cluster lock_dlm: Unknown symbol dlm_lock lock_dlm: Unknown symbol kcl_cluster_name lock_dlm: Unknown symbol kcl_get_services lock_dlm: Unknown symbol kcl_addref_cluster -- Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster